Comparison of Matlab functions and Ops

This page is under active development.

The intention is to help developers switch from MATLAB to Ops by showing equivalent operations.

Import, Export, and Conversion

Read and Write Image Data from Files

\| [`imread`](https://www.mathworks.com/help/matlab/ref/imread.html)	\| Read image from graphics file
\| [`imwrite`](https://www.mathworks.com/help/matlab/ref/imwrite.html)	\| Write image to graphics file
\| [`imfinfo`](https://www.mathworks.com/help/matlab/ref/imfinfo.html)	\| Information about graphics file
\| [`nitfinfo`](https://www.mathworks.com/help/images/ref/nitfinfo.html)	\| Read metadata from National Imagery Transmission Format (NITF) file
\| [`nitfread`](https://www.mathworks.com/help/images/ref/nitfread.html)	\| Read image from NITF file
\| [`dpxinfo`](https://www.mathworks.com/help/images/ref/dpxinfo.html)	\| Read metadata from DPX file
\| [`dpxread`](https://www.mathworks.com/help/images/ref/dpxread.html)	\| Read DPX image
\| [`analyze75info`](https://www.mathworks.com/help/images/ref/analyze75info.html)	\| Read metadata from header file of Analyze 7.5 data set
\| [`analyze75read`](https://www.mathworks.com/help/images/ref/analyze75read.html)	\| Read image data from image file of Analyze 7.5 data set
\| [`interfileinfo`](https://www.mathworks.com/help/images/ref/interfileinfo.html)	\| Read metadata from Interfile file
\| [`interfileread`](https://www.mathworks.com/help/images/ref/interfileread.html)	\| Read images in Interfile format

Read and Write Image Data from DICOM Files

\| [`dicomanon`](https://www.mathworks.com/help/images/ref/dicomanon.html)	\| Anonymize DICOM file
\| [`dicomdict`](https://www.mathworks.com/help/images/ref/dicomdict.html)	\| Get or set active DICOM data dictionary
\| [`dicomdisp`](https://www.mathworks.com/help/images/ref/dicomdisp.html)	\| Display DICOM file structure
\| [`dicominfo`](https://www.mathworks.com/help/images/ref/dicominfo.html)	\| Read metadata from DICOM message
\| [`dicomlookup`](https://www.mathworks.com/help/images/ref/dicomlookup.html)	\| Find attribute in DICOM data dictionary
\| [`dicomread`](https://www.mathworks.com/help/images/ref/dicomread.html)	\| Read DICOM image
\| [`dicomuid`](https://www.mathworks.com/help/images/ref/dicomuid.html)	\| Generate DICOM unique identifier
\| [`dicomwrite`](https://www.mathworks.com/help/images/ref/dicomwrite.html)	\| Write images as DICOM files

High Dynamic Range Images

\| [`hdrread`](https://www.mathworks.com/help/images/ref/hdrread.html)	\| Read high dynamic range (HDR) image
\| [`hdrwrite`](https://www.mathworks.com/help/images/ref/hdrwrite.html)	\| Write Radiance high dynamic range (HDR) image file
\| [`makehdr`](https://www.mathworks.com/help/images/ref/makehdr.html)	\| Create high dynamic range image
\| [`tonemap`](https://www.mathworks.com/help/images/ref/tonemap.html)	\| Render high dynamic range image for viewing

Large Image Files

\| [`ImageAdapter`](https://www.mathworks.com/help/images/ref/ImageAdapter.html)	\| Interface for image I/O
\| [`isrset`](https://www.mathworks.com/help/images/ref/isrset.html)	\| Check if file is R-Set
\| [`openrset`](https://www.mathworks.com/help/images/ref/openrset.html)	\| Open R-Set file
\| [`rsetwrite`](https://www.mathworks.com/help/images/ref/rsetwrite.html)	\| Create reduced resolution data set from image file

Image Type Conversion

\| [`gray2ind`](https://www.mathworks.com/help/images/ref/gray2ind.html)	\| Convert grayscale or binary image to indexed image
\| [`ind2gray`](https://www.mathworks.com/help/images/ref/ind2gray.html)	\| Convert indexed image to grayscale image
\| [`mat2gray`](https://www.mathworks.com/help/images/ref/mat2gray.html)	\| Convert matrix to grayscale image
\| [`rgb2gray`](https://www.mathworks.com/help/matlab/ref/rgb2gray.html)	\| Convert RGB image or colormap to grayscale
\| [`ind2rgb`](https://www.mathworks.com/help/images/ref/ind2rgb.html)	\| Convert indexed image to RGB image
\| [`label2rgb`](https://www.mathworks.com/help/images/ref/label2rgb.html)	\| Convert label matrix into RGB image
\| [`demosaic`](https://www.mathworks.com/help/images/ref/demosaic.html)	\| Convert Bayer pattern encoded image to truecolor image
\| [`imbinarize`](https://www.mathworks.com/help/images/ref/imbinarize.html)	\| Binarize image by thresholding
\| [`imquantize`](https://www.mathworks.com/help/images/ref/imquantize.html)	\| Quantize image using specified quantization levels and output values
\| [`multithresh`](https://www.mathworks.com/help/images/ref/multithresh.html)	\| Multilevel image thresholds using Otsu's method
\| [`adaptthresh`](https://www.mathworks.com/help/images/ref/adaptthresh.html)	\| Adaptive image threshold using local first-order statistics
\| [`otsuthresh`](https://www.mathworks.com/help/images/ref/otsuthresh.html)	\| Global histogram threshold using Otsu's method
\| [`graythresh`](https://www.mathworks.com/help/images/ref/graythresh.html)	\| Global image threshold using Otsu's method
\| [`grayslice`](https://www.mathworks.com/help/images/ref/grayslice.html)	\| Convert grayscale image to indexed image using multilevel thresholding
\| [`im2double`](https://www.mathworks.com/help/matlab/ref/im2double.html)	\| Convert image to double precision
\| [`im2int16`](https://www.mathworks.com/help/images/ref/im2int16.html)	\| Convert image to 16-bit signed integers
\| [`im2java2d`](https://www.mathworks.com/help/images/ref/im2java2d.html)	\| Convert image to Java buffered image
\| [`im2single`](https://www.mathworks.com/help/images/ref/im2single.html)	\| Convert image to single precision
\| [`im2uint16`](https://www.mathworks.com/help/images/ref/im2uint16.html)	\| Convert image to 16-bit unsigned integers
\| [`im2uint8`](https://www.mathworks.com/help/images/ref/im2uint8.html)	\| Convert image to 8-bit unsigned integers

Color

\| [`rgb2lab`](https://www.mathworks.com/help/images/ref/rgb2lab.html)	\| Convert RGB to CIE 1976 Lab*
\| [`rgb2ntsc`](https://www.mathworks.com/help/images/ref/rgb2ntsc.html)	\| Convert RGB color values to NTSC color space
\| [`rgb2xyz`](https://www.mathworks.com/help/images/ref/rgb2xyz.html)	\| Convert RGB to CIE 1931 XYZ
\| [`rgb2ycbcr`](https://www.mathworks.com/help/images/ref/rgb2ycbcr.html)	\| Convert RGB color values to YCbCr color space
\| [`lab2rgb`](https://www.mathworks.com/help/images/ref/lab2rgb.html)	\| Convert CIE 1976 Lab* to RGB
\| [`lab2xyz`](https://www.mathworks.com/help/images/ref/lab2xyz.html)	\| Convert CIE 1976 Lab* to CIE 1931 XYZ
\| [`xyz2lab`](https://www.mathworks.com/help/images/ref/xyz2lab.html)	\| Convert CIE 1931 XYZ to CIE 1976 Lab*
\| [`xyz2rgb`](https://www.mathworks.com/help/images/ref/xyz2rgb.html)	\| Convert CIE 1931 XYZ to RGB
\| [`ycbcr2rgb`](https://www.mathworks.com/help/images/ref/ycbcr2rgb.html)	\| Convert YCbCr color values to RGB color space
\| [`ntsc2rgb`](https://www.mathworks.com/help/images/ref/ntsc2rgb.html)	\| Convert NTSC values to RGB color space
\| [`lab2double`](https://www.mathworks.com/help/images/ref/lab2double.html)	\| Convert Lab* data to double
\| [`lab2uint16`](https://www.mathworks.com/help/images/ref/lab2uint16.html)	\| Convert Lab* data to uint16
\| [`lab2uint8`](https://www.mathworks.com/help/images/ref/lab2uint8.html)	\| Convert Lab* data to uint8
\| [`xyz2double`](https://www.mathworks.com/help/images/ref/xyz2double.html)	\| Convert XYZ color values to double
\| [`xyz2uint16`](https://www.mathworks.com/help/images/ref/xyz2uint16.html)	\| Convert XYZ color values to uint16
\| [`iccfind`](https://www.mathworks.com/help/images/ref/iccfind.html)	\| Search for ICC profiles
\| [`iccread`](https://www.mathworks.com/help/images/ref/iccread.html)	\| Read ICC profile
\| [`iccroot`](https://www.mathworks.com/help/images/ref/iccroot.html)	\| Find system default ICC profile repository
\| [`iccwrite`](https://www.mathworks.com/help/images/ref/iccwrite.html)	\| Write ICC color profile to disk file
\| [`isicc`](https://www.mathworks.com/help/images/ref/isicc.html)	\| True for valid ICC color profile
\| [`makecform`](https://www.mathworks.com/help/images/ref/makecform.html)	\| Create color transformation structure
\| [`applycform`](https://www.mathworks.com/help/images/ref/applycform.html)	\| Apply device-independent color space transformation
\| [`imapprox`](https://www.mathworks.com/help/matlab/ref/imapprox.html)	\| Approximate indexed image by reducing number of colors
\| [`colorcloud`](https://www.mathworks.com/help/images/ref/colorcloud.html)	\| Display 3-D color gamut as point cloud in specified color space
\| [`whitepoint`](https://www.mathworks.com/help/images/ref/whitepoint.html)	\| XYZ color values of standard illuminants

Synthetic Images

\| [`checkerboard`](https://www.mathworks.com/help/images/ref/checkerboard.html)	\| Create checkerboard image
\| [`phantom`](https://www.mathworks.com/help/images/ref/phantom.html)	\| Create head phantom image
\| [`imnoise`](https://www.mathworks.com/help/images/ref/imnoise.html)	\| Add noise to image

Display and Exploration

Basic Display

\| [`imshow`](https://www.mathworks.com/help/images/ref/imshow.html)	\| Display image
\| [`montage`](https://www.mathworks.com/help/images/ref/montage.html)	\| Display multiple image frames as rectangular montage
\| [`immovie`](https://www.mathworks.com/help/images/ref/immovie.html)	\| Make movie from multiframe image
\| [`implay`](https://www.mathworks.com/help/images/ref/implay.html)	\| Play movies, videos, or image sequences
\| [`warp`](https://www.mathworks.com/help/images/ref/warp.html)	\| Display image as texture-mapped surface
\| [`iptgetpref`](https://www.mathworks.com/help/images/ref/iptgetpref.html)	\| Get values of Image Processing Toolbox preferences
\| [`iptprefs`](https://www.mathworks.com/help/images/ref/iptprefs.html)	\| Display Image Processing Toolbox Preferences dialog box
\| [`iptsetpref`](https://www.mathworks.com/help/images/ref/iptsetpref.html)	\| Set Image Processing Toolbox preferences or display valid values

Interactive Exploration with the Image Viewer App

\| [`imtool`](https://www.mathworks.com/help/images/ref/imtool.html)	\| Image Viewer app
\| [`imageinfo`](https://www.mathworks.com/help/images/ref/imageinfo.html)	\| Image Information tool
\| [`imcontrast`](https://www.mathworks.com/help/images/ref/imcontrast.html)	\| Adjust Contrast tool
\| [`imdisplayrange`](https://www.mathworks.com/help/images/ref/imdisplayrange.html)	\| Display Range tool
\| [`imdistline`](https://www.mathworks.com/help/images/ref/imdistline.html)	\| Distance tool
\| [`impixelinfo`](https://www.mathworks.com/help/images/ref/impixelinfo.html)	\| Pixel Information tool
\| [`impixelinfoval`](https://www.mathworks.com/help/images/ref/impixelinfoval.html)	\| Pixel Information tool without text label
\| [`impixelregion`](https://www.mathworks.com/help/images/ref/impixelregion.html)	\| Pixel Region tool
\| [`immagbox`](https://www.mathworks.com/help/images/ref/immagbox.html)	\| Magnification box for scroll panel
\| [`imoverview`](https://www.mathworks.com/help/images/ref/imoverview.html)	\| Overview tool for image displayed in scroll panel
\| [`iptgetpref`](https://www.mathworks.com/help/images/ref/iptgetpref.html)	\| Get values of Image Processing Toolbox preferences
\| [`iptprefs`](https://www.mathworks.com/help/images/ref/iptprefs.html)	\| Display Image Processing Toolbox Preferences dialog box
\| [`iptsetpref`](https://www.mathworks.com/help/images/ref/iptsetpref.html)	\| Set Image Processing Toolbox preferences or display valid values

Build Interactive Tools

\| [`imageinfo`](https://www.mathworks.com/help/images/ref/imageinfo.html)	\| Image Information tool
\| [`imcolormaptool`](https://www.mathworks.com/help/images/ref/imcolormaptool.html)	\| Choose Colormap tool
\| [`imcontrast`](https://www.mathworks.com/help/images/ref/imcontrast.html)	\| Adjust Contrast tool
\| [`imcrop`](https://www.mathworks.com/help/images/ref/imcrop.html)	\| Crop image
\| [`imdisplayrange`](https://www.mathworks.com/help/images/ref/imdisplayrange.html)	\| Display Range tool
\| [`imdistline`](https://www.mathworks.com/help/images/ref/imdistline.html)	\| Distance tool
\| [`impixelinfo`](https://www.mathworks.com/help/images/ref/impixelinfo.html)	\| Pixel Information tool
\| [`impixelinfoval`](https://www.mathworks.com/help/images/ref/impixelinfoval.html)	\| Pixel Information tool without text label
\| [`impixelregion`](https://www.mathworks.com/help/images/ref/impixelregion.html)	\| Pixel Region tool
\| [`impixelregionpanel`](https://www.mathworks.com/help/images/ref/impixelregionpanel.html)	\| Pixel Region tool panel
\| [`immagbox`](https://www.mathworks.com/help/images/ref/immagbox.html)	\| Magnification box for scroll panel
\| [`imoverview`](https://www.mathworks.com/help/images/ref/imoverview.html)	\| Overview tool for image displayed in scroll panel
\| [`imoverviewpanel`](https://www.mathworks.com/help/images/ref/imoverviewpanel.html)	\| Overview tool panel for image displayed in scroll panel
\| [`imsave`](https://www.mathworks.com/help/images/ref/imsave.html)	\| Save Image Tool
\| [`imscrollpanel`](https://www.mathworks.com/help/images/ref/imscrollpanel.html)	\| Scroll panel for interactive image navigation
\| [`imellipse`](https://www.mathworks.com/help/images/ref/imellipse.html)	\| Create draggable ellipse
\| [`imfreehand`](https://www.mathworks.com/help/images/ref/imfreehand.html)	\| Create draggable freehand region
\| [`imline`](https://www.mathworks.com/help/images/ref/imline.html)	\| Create draggable, resizable line
\| [`impoint`](https://www.mathworks.com/help/images/ref/impoint.html)	\| Create draggable point
\| [`impoly`](https://www.mathworks.com/help/images/ref/impoly.html)	\| Create draggable, resizable polygon
\| [`imrect`](https://www.mathworks.com/help/images/ref/imrect.html)	\| Create draggable rectangle
\| [`imroi`](https://www.mathworks.com/help/images/ref/imroi.html)	\| Region-of-interest (ROI) base class
\| [`getline`](https://www.mathworks.com/help/images/ref/getline.html)	\| Select polyline with mouse
\| [`getpts`](https://www.mathworks.com/help/images/ref/getpts.html)	\| Specify points with mouse
\| [`getrect`](https://www.mathworks.com/help/images/ref/getrect.html)	\| Specify rectangle with mouse
\| [`getimage`](https://www.mathworks.com/help/images/ref/getimage.html)	\| Image data from axes
\| [`getimagemodel`](https://www.mathworks.com/help/images/ref/getimagemodel.html)	\| Image model object from image object
\| [`imagemodel`](https://www.mathworks.com/help/images/ref/imagemodel.html)	\| Image Model object
\| [`axes2pix`](https://www.mathworks.com/help/images/ref/axes2pix.html)	\| Convert axes coordinates to pixel coordinates
\| [`imattributes`](https://www.mathworks.com/help/images/ref/imattributes.html)	\| Information about image attributes
\| [`imgca`](https://www.mathworks.com/help/images/ref/imgca.html)	\| Get current axes containing image
\| [`imgcf`](https://www.mathworks.com/help/images/ref/imgcf.html)	\| Get current figure containing image
\| [`imgetfile`](https://www.mathworks.com/help/images/ref/imgetfile.html)	\| Display Open Image dialog box
\| [`imhandles`](https://www.mathworks.com/help/images/ref/imhandles.html)	\| Get all image objects
\| [`iptaddcallback`](https://www.mathworks.com/help/images/ref/iptaddcallback.html)	\| Add function handle to callback list
\| [`iptcheckhandle`](https://www.mathworks.com/help/images/ref/iptcheckhandle.html)	\| Check validity of handle
\| [`iptgetapi`](https://www.mathworks.com/help/images/ref/iptgetapi.html)	\| Get Application Programmer Interface (API) for handle
\| [`iptGetPointerBehavior`](https://www.mathworks.com/help/images/ref/iptGetPointerBehavior.html)	\| Retrieve pointer behavior from graphics object
\| [`ipticondir`](https://www.mathworks.com/help/images/ref/ipticondir.html)	\| Directories containing IPT and MATLAB icons
\| [`iptPointerManager`](https://www.mathworks.com/help/images/ref/iptPointerManager.html)	\| Create pointer manager in figure
\| [`iptremovecallback`](https://www.mathworks.com/help/images/ref/iptremovecallback.html)	\| Delete function handle from callback list
\| [`iptSetPointerBehavior`](https://www.mathworks.com/help/images/ref/iptSetPointerBehavior.html)	\| Store pointer behavior structure in graphics object
\| [`iptwindowalign`](https://www.mathworks.com/help/images/ref/iptwindowalign.html)	\| Align figure windows
\| [`makeConstrainToRectFcn`](https://www.mathworks.com/help/images/ref/makeConstrainToRectFcn.html)	\| Create rectangularly bounded drag constraint function
\| [`truesize`](https://www.mathworks.com/help/images/ref/truesize.html)	\| Adjust display size of image

Geometric Transformation, Spatial Referencing, and Image Registration

Geometric Transformations

\| [`imcrop`](https://www.mathworks.com/help/images/ref/imcrop.html)	\| Crop image
\| [`imresize`](https://www.mathworks.com/help/images/ref/imresize.html)	\| Resize image
\| [`imrotate`](https://www.mathworks.com/help/images/ref/imrotate.html)	\| Rotate image
\| [`imtranslate`](https://www.mathworks.com/help/images/ref/imtranslate.html)	\| Translate image
\| [`impyramid`](https://www.mathworks.com/help/images/ref/impyramid.html)	\| Image pyramid reduction and expansion
\| [`imwarp`](https://www.mathworks.com/help/images/ref/imwarp.html)	\| Apply geometric transformation to image
\| [`fitgeotrans`](https://www.mathworks.com/help/images/ref/fitgeotrans.html)	\| Fit geometric transformation to control point pairs
\| [`imtransform`](https://www.mathworks.com/help/images/ref/imtransform.html)	\| Apply 2-D spatial transformation to image
\| [`findbounds`](https://www.mathworks.com/help/images/ref/findbounds.html)	\| Find output bounds for spatial transformation
\| [`fliptform`](https://www.mathworks.com/help/images/ref/fliptform.html)	\| Flip input and output roles of TFORM structure
\| [`makeresampler`](https://www.mathworks.com/help/images/ref/makeresampler.html)	\| Create resampling structure
\| [`maketform`](https://www.mathworks.com/help/images/ref/maketform.html)	\| Create spatial transformation structure (TFORM)
\| [`tformarray`](https://www.mathworks.com/help/images/ref/tformarray.html)	\| Apply spatial transformation to N-D array
\| [`tformfwd`](https://www.mathworks.com/help/images/ref/tformfwd.html)	\| Apply forward spatial transformation
\| [`tforminv`](https://www.mathworks.com/help/images/ref/tforminv.html)	\| Apply inverse spatial transformation
\| [`checkerboard`](https://www.mathworks.com/help/images/ref/checkerboard.html)	\| Create checkerboard image
\| [`affine2d`](https://www.mathworks.com/help/images/ref/affine2d.html)	\| 2-D Affine Geometric Transformation
\| [`affine3d`](https://www.mathworks.com/help/images/ref/affine3d.html)	\| 3-D Affine Geometric Transformation
\| [`projective2d`](https://www.mathworks.com/help/images/ref/projective2d.html)	\| 2-D Projective Geometric Transformation
\| [`images.geotrans.PiecewiseLinearTransformation2D`](https://www.mathworks.com/help/images/ref/images.geotrans.PiecewiseLinearTransformation2D.html)	\| 2-D piecewise linear geometric transformation
\| [`images.geotrans.PolynomialTransformation2D`](https://www.mathworks.com/help/images/ref/images.geotrans.PolynomialTransformation2D.html)	\| 2-D Polynomial Geometric Transformation
\| [`images.geotrans.LocalWeightedMeanTransformation2D`](https://www.mathworks.com/help/images/ref/images.geotrans.LocalWeightedMeanTransformation2D.html)	\| 2-D Local Weighted Mean Geometric Transformation

Spatial Referencing

\| [`imwarp`](https://www.mathworks.com/help/images/ref/imwarp.html)	\| Apply geometric transformation to image
\| [`imregister`](https://www.mathworks.com/help/images/ref/imregister.html)	\| Intensity-based image registration
\| [`imregtform`](https://www.mathworks.com/help/images/ref/imregtform.html)	\| Estimate geometric transformation that aligns two 2-D or 3-D images
\| [`imshow`](https://www.mathworks.com/help/images/ref/imshow.html)	\| Display image
\| [`imshowpair`](https://www.mathworks.com/help/images/ref/imshowpair.html)	\| Compare differences between images
\| [`imfuse`](https://www.mathworks.com/help/images/ref/imfuse.html)	\| Composite of two images
\| [`imref2d`](https://www.mathworks.com/help/images/ref/imref2d.html)	\| Reference 2-D image to world coordinates
\| [`imref3d`](https://www.mathworks.com/help/images/ref/imref3d.html)	\| Reference 3-D image to world coordinates

Automatic Registration

\| [`imregister`](https://www.mathworks.com/help/images/ref/imregister.html)	\| Intensity-based image registration
\| [`imregconfig`](https://www.mathworks.com/help/images/ref/imregconfig.html)	\| Configurations for intensity-based registration
\| [`imregtform`](https://www.mathworks.com/help/images/ref/imregtform.html)	\| Estimate geometric transformation that aligns two 2-D or 3-D images
\| [`imregcorr`](https://www.mathworks.com/help/images/ref/imregcorr.html)	\| Estimates geometric transformation that aligns two 2-D images using phase correlation
\| [`imregdemons`](https://www.mathworks.com/help/images/ref/imregdemons.html)	\| Estimate displacement field that aligns two 2-D or 3-D images
\| [`imfuse`](https://www.mathworks.com/help/images/ref/imfuse.html)	\| Composite of two images
\| [`imshowpair`](https://www.mathworks.com/help/images/ref/imshowpair.html)	\| Compare differences between images
\| [`registration.metric.MattesMutualInformation`](https://www.mathworks.com/help/images/ref/registration.metric.MattesMutualInformation.html)	\| Mattes mutual information metric configuration object
\| [`registration.metric.MeanSquares`](https://www.mathworks.com/help/images/ref/registration.metric.MeanSquares.html)	\| Mean square error metric configuration object
\| [`registration.optimizer.RegularStepGradientDescent`](https://www.mathworks.com/help/images/ref/registration.optimizer.RegularStepGradientDescent.html)	\| Regular step gradient descent optimizer configuration object
\| [`registration.optimizer.OnePlusOneEvolutionary`](https://www.mathworks.com/help/images/ref/registration.optimizer.OnePlusOneEvolutionary.html)	\| One-plus-one evolutionary optimizer configuration object

Control Point Registration

\| [`cpselect`](https://www.mathworks.com/help/images/ref/cpselect.html)	\| Control Point Selection Tool
\| [`fitgeotrans`](https://www.mathworks.com/help/images/ref/fitgeotrans.html)	\| Fit geometric transformation to control point pairs
\| [`cpcorr`](https://www.mathworks.com/help/images/ref/cpcorr.html)	\| Tune control-point locations using cross correlation
\| [`cpstruct2pairs`](https://www.mathworks.com/help/images/ref/cpstruct2pairs.html)	\| Convert CPSTRUCT to valid pairs of control points
\| [`normxcorr2`](https://www.mathworks.com/help/images/ref/normxcorr2.html)	\| Normalized 2-D cross-correlation
\| [`cp2tform`](https://www.mathworks.com/help/images/ref/cp2tform.html)	\| Infer spatial transformation from control point pairs

Image Enhancement

Contrast Adjustment

\| [`imadjust`](https://www.mathworks.com/help/images/ref/imadjust.html)	\| Adjust image intensity values or colormap
\| [`imcontrast`](https://www.mathworks.com/help/images/ref/imcontrast.html)	\| Adjust Contrast tool
\| [`imsharpen`](https://www.mathworks.com/help/images/ref/imsharpen.html)	\| Sharpen image using unsharp masking
\| [`locallapfilt`](https://www.mathworks.com/help/images/ref/locallapfilt.html)	\| Fast Local Laplacian Filtering of images
\| [`localcontrast`](https://www.mathworks.com/help/images/ref/localcontrast.html)	\| Edge-aware local contrast manipulation of images
\| [`localtonemap`](https://www.mathworks.com/help/images/ref/localtonemap.html)	\| Render HDR image for viewing while enhancing local contrast
\| [`histeq`](https://www.mathworks.com/help/images/ref/histeq.html)	\| Enhance contrast using histogram equalization
\| [`adapthisteq`](https://www.mathworks.com/help/images/ref/adapthisteq.html)	\| Contrast-limited adaptive histogram equalization (CLAHE)
\| [`imhistmatch`](https://www.mathworks.com/help/images/ref/imhistmatch.html)	\| Adjust histogram of image to match N-bin histogram of reference image
\| [`decorrstretch`](https://www.mathworks.com/help/images/ref/decorrstretch.html)	\| Apply decorrelation stretch to multichannel image
\| [`stretchlim`](https://www.mathworks.com/help/images/ref/stretchlim.html)	\| Find limits to contrast stretch image
\| [`intlut`](https://www.mathworks.com/help/images/ref/intlut.html)	\| Convert integer values using lookup table
\| [`imnoise`](https://www.mathworks.com/help/images/ref/imnoise.html)	\| Add noise to image

Image Filtering

\| [`imfilter`](https://www.mathworks.com/help/images/ref/imfilter.html)	\| N-D filtering of multidimensional images
\| [`imgaussfilt`](https://www.mathworks.com/help/images/ref/imgaussfilt.html)	\| 2-D Gaussian filtering of images
\| [`imgaussfilt3`](https://www.mathworks.com/help/images/ref/imgaussfilt3.html)	\| 3-D Gaussian filtering of 3-D images
\| [`fspecial`](https://www.mathworks.com/help/images/ref/fspecial.html)	\| Create predefined 2-D filter
\| [`imguidedfilter`](https://www.mathworks.com/help/images/ref/imguidedfilter.html)	\| Guided filtering of images
\| [`normxcorr2`](https://www.mathworks.com/help/images/ref/normxcorr2.html)	\| Normalized 2-D cross-correlation
\| [`wiener2`](https://www.mathworks.com/help/images/ref/wiener2.html)	\| 2-D adaptive noise-removal filtering
\| [`medfilt2`](https://www.mathworks.com/help/images/ref/medfilt2.html)	\| 2-D median filtering
\| [`medfilt3`](https://www.mathworks.com/help/images/ref/medfilt3.html)	\| 3-D median filtering
\| [`ordfilt2`](https://www.mathworks.com/help/images/ref/ordfilt2.html)	\| 2-D order-statistic filtering
\| [`stdfilt`](https://www.mathworks.com/help/images/ref/stdfilt.html)	\| Local standard deviation of image
\| [`rangefilt`](https://www.mathworks.com/help/images/ref/rangefilt.html)	\| Local range of image
\| [`entropyfilt`](https://www.mathworks.com/help/images/ref/entropyfilt.html)	\| Local entropy of grayscale image
\| [`nlfilter`](https://www.mathworks.com/help/images/ref/nlfilter.html)	\| General sliding-neighborhood operations
\| [`gabor`](https://www.mathworks.com/help/images/ref/gabor.html)	\| Create Gabor filter or Gabor filter bank
\| [`imgaborfilt`](https://www.mathworks.com/help/images/ref/imgaborfilt.html)	\| Apply Gabor filter or set of filters to 2-D image
\| [`imboxfilt`](https://www.mathworks.com/help/images/ref/imboxfilt.html)	\| 2-D box filtering of images
\| [`imboxfilt3`](https://www.mathworks.com/help/images/ref/imboxfilt3.html)	\| 3-D box filtering of 3-D images
\| [`integralImage`](https://www.mathworks.com/help/images/ref/integralImage.html)	\| Calculate integral image
\| [`integralImage3`](https://www.mathworks.com/help/images/ref/integralImage3.html)	\| Calculate 3-D integral image
\| [`integralBoxFilter`](https://www.mathworks.com/help/images/ref/integralBoxFilter.html)	\| 2-D box filtering of integral images
\| [`integralBoxFilter3`](https://www.mathworks.com/help/images/ref/integralBoxFilter3.html)	\| 3-D box filtering of 3-D integral images
\| [`bwareafilt`](https://www.mathworks.com/help/images/ref/bwareafilt.html)	\| Extract objects from binary image by size
\| [`bwpropfilt`](https://www.mathworks.com/help/images/ref/bwpropfilt.html)	\| Extract objects from binary image using properties
\| [`padarray`](https://www.mathworks.com/help/images/ref/padarray.html)	\| Pad array
\| [`freqz2`](https://www.mathworks.com/help/images/ref/freqz2.html)	\| 2-D frequency response
\| [`fsamp2`](https://www.mathworks.com/help/images/ref/fsamp2.html)	\| 2-D FIR filter using frequency sampling
\| [`ftrans2`](https://www.mathworks.com/help/images/ref/ftrans2.html)	\| 2-D FIR filter using frequency transformation
\| [`fwind1`](https://www.mathworks.com/help/images/ref/fwind1.html)	\| 2-D FIR filter using 1-D window method
\| [`fwind2`](https://www.mathworks.com/help/images/ref/fwind2.html)	\| 2-D FIR filter using 2-D window method
\| [`convmtx2`](https://www.mathworks.com/help/images/ref/convmtx2.html)	\| 2-D convolution matrix

Morphological Operations

\| [`bwhitmiss`](https://www.mathworks.com/help/images/ref/bwhitmiss.html)	\| Binary hit-miss operation
\| [`bwmorph`](https://www.mathworks.com/help/images/ref/bwmorph.html)	\| Morphological operations on binary images
\| [`bwulterode`](https://www.mathworks.com/help/images/ref/bwulterode.html)	\| Ultimate erosion
\| [`bwareaopen`](https://www.mathworks.com/help/images/ref/bwareaopen.html)	\| Remove small objects from binary image
\| [`imbothat`](https://www.mathworks.com/help/images/ref/imbothat.html)	\| Bottom-hat filtering
\| [`imclearborder`](https://www.mathworks.com/help/images/ref/imclearborder.html)	\| Suppress light structures connected to image border
\| [`imclose`](https://www.mathworks.com/help/images/ref/imclose.html)	\| Morphologically close image
\| [`imdilate`](https://www.mathworks.com/help/images/ref/imdilate.html)	\| Dilate image
\| [`imerode`](https://www.mathworks.com/help/images/ref/imerode.html)	\| Erode image
\| [`imextendedmax`](https://www.mathworks.com/help/images/ref/imextendedmax.html)	\| Extended-maxima transform
\| [`imextendedmin`](https://www.mathworks.com/help/images/ref/imextendedmin.html)	\| Extended-minima transform
\| [`imfill`](https://www.mathworks.com/help/images/ref/imfill.html)	\| Fill image regions and holes
\| [`imhmax`](https://www.mathworks.com/help/images/ref/imhmax.html)	\| H-maxima transform
\| [`imhmin`](https://www.mathworks.com/help/images/ref/imhmin.html)	\| H-minima transform
\| [`imimposemin`](https://www.mathworks.com/help/images/ref/imimposemin.html)	\| Impose minima
\| [`imopen`](https://www.mathworks.com/help/images/ref/imopen.html)	\| Morphologically open image
\| [`imreconstruct`](https://www.mathworks.com/help/images/ref/imreconstruct.html)	\| Morphological reconstruction
\| [`imregionalmax`](https://www.mathworks.com/help/images/ref/imregionalmax.html)	\| Regional maxima
\| [`imregionalmin`](https://www.mathworks.com/help/images/ref/imregionalmin.html)	\| Regional minima
\| [`imtophat`](https://www.mathworks.com/help/images/ref/imtophat.html)	\| Top-hat filtering
\| [`watershed`](https://www.mathworks.com/help/images/ref/watershed.html)	\| Watershed transform
\| [`conndef`](https://www.mathworks.com/help/images/ref/conndef.html)	\| Create connectivity array
\| [`iptcheckconn`](https://www.mathworks.com/help/images/ref/iptcheckconn.html)	\| Check validity of connectivity argument
\| [`applylut`](https://www.mathworks.com/help/images/ref/applylut.html)	\| Neighborhood operations on binary images using lookup tables
\| [`bwlookup`](https://www.mathworks.com/help/images/ref/bwlookup.html)	\| Nonlinear filtering using lookup tables
\| [`makelut`](https://www.mathworks.com/help/images/ref/makelut.html)	\| Create lookup table for use with bwlookup
\| [`strel`](https://www.mathworks.com/help/images/ref/strel.html)	\| Morphological structuring element
\| [`offsetstrel`](https://www.mathworks.com/help/images/ref/offsetstrel.html)	\| Morphological offset structuring element

Deblurring

\| [`deconvblind`](https://www.mathworks.com/help/images/ref/deconvblind.html)	\| Deblur image using blind deconvolution
\| [`deconvlucy`](https://www.mathworks.com/help/images/ref/deconvlucy.html)	\| Deblur image using Lucy-Richardson method
\| [`deconvreg`](https://www.mathworks.com/help/images/ref/deconvreg.html)	\| Deblur image using regularized filter
\| [`deconvwnr`](https://www.mathworks.com/help/images/ref/deconvwnr.html)	\| Deblur image using Wiener filter
\| [`edgetaper`](https://www.mathworks.com/help/images/ref/edgetaper.html)	\| Taper discontinuities along image edges
\| [`otf2psf`](https://www.mathworks.com/help/images/ref/otf2psf.html)	\| Convert optical transfer function to point-spread function
\| [`psf2otf`](https://www.mathworks.com/help/images/ref/psf2otf.html)	\| Convert point-spread function to optical transfer function
\| [`padarray`](https://www.mathworks.com/help/images/ref/padarray.html)	\| Pad array

ROI-Based Processing

\| [`roipoly`](https://www.mathworks.com/help/images/ref/roipoly.html)	\| Specify polygonal region of interest (ROI)
\| [`poly2mask`](https://www.mathworks.com/help/images/ref/poly2mask.html)	\| Convert region of interest (ROI) polygon to region mask
\| [`regionfill`](https://www.mathworks.com/help/images/ref/regionfill.html)	\| Fill in specified regions in image using inward interpolation
\| [`roicolor`](https://www.mathworks.com/help/images/ref/roicolor.html)	\| Select region of interest (ROI) based on color
\| [`roifilt2`](https://www.mathworks.com/help/images/ref/roifilt2.html)	\| Filter region of interest (ROI) in image
\| [`imellipse`](https://www.mathworks.com/help/images/ref/imellipse.html)	\| Create draggable ellipse
\| [`imfreehand`](https://www.mathworks.com/help/images/ref/imfreehand.html)	\| Create draggable freehand region
\| [`impoly`](https://www.mathworks.com/help/images/ref/impoly.html)	\| Create draggable, resizable polygon
\| [`imrect`](https://www.mathworks.com/help/images/ref/imrect.html)	\| Create draggable rectangle
\| [`imroi`](https://www.mathworks.com/help/images/ref/imroi.html)	\| Region-of-interest (ROI) base class

Neighborhood and Block Processing

\| [`ImageAdapter`](https://www.mathworks.com/help/images/ref/ImageAdapter.html)	\| Interface for image I/O
\| [`blockproc`](https://www.mathworks.com/help/images/ref/blockproc.html)	\| Distinct block processing for image
\| [`bestblk`](https://www.mathworks.com/help/images/ref/bestblk.html)	\| Determine optimal block size for block processing
\| [`nlfilter`](https://www.mathworks.com/help/images/ref/nlfilter.html)	\| General sliding-neighborhood operations
\| [`col2im`](https://www.mathworks.com/help/images/ref/col2im.html)	\| Rearrange matrix columns into blocks
\| [`colfilt`](https://www.mathworks.com/help/images/ref/colfilt.html)	\| Columnwise neighborhood operations
\| [`im2col`](https://www.mathworks.com/help/images/ref/im2col.html)	\| Rearrange image blocks into columns

Image Arithmetic

\| [`imabsdiff`](https://www.mathworks.com/help/images/ref/imabsdiff.html)	\| Absolute difference of two images
\| [`imadd`](https://www.mathworks.com/help/images/ref/imadd.html)	\| Add two images or add constant to image
\| [`imapplymatrix`](https://www.mathworks.com/help/images/ref/imapplymatrix.html)	\| Linear combination of color channels
\| [`imcomplement`](https://www.mathworks.com/help/images/ref/imcomplement.html)	\| Complement image
\| [`imdivide`](https://www.mathworks.com/help/images/ref/imdivide.html)	\| Divide one image into another or divide image by constant
\| [`imlincomb`](https://www.mathworks.com/help/images/ref/imlincomb.html)	\| Linear combination of images
\| [`immultiply`](https://www.mathworks.com/help/images/ref/immultiply.html)	\| Multiply two images or multiply image by constant
\| [`imsubtract`](https://www.mathworks.com/help/images/ref/imsubtract.html)	\| Subtract one image from another or subtract constant from image

Image Analysis

Object Analysis

\| [`bwboundaries`](https://www.mathworks.com/help/images/ref/bwboundaries.html)	\| Trace region boundaries in binary image
\| [`bwtraceboundary`](https://www.mathworks.com/help/images/ref/bwtraceboundary.html)	\| Trace object in binary image
\| [`visboundaries`](https://www.mathworks.com/help/images/ref/visboundaries.html)	\| Plot region boundaries
\| [`edge`](https://www.mathworks.com/help/images/ref/edge.html)	\| Find edges in intensity image
\| [`imfindcircles`](https://www.mathworks.com/help/images/ref/imfindcircles.html)	\| Find circles using circular Hough transform
\| [`viscircles`](https://www.mathworks.com/help/images/ref/viscircles.html)	\| Create circle
\| [`imgradient`](https://www.mathworks.com/help/images/ref/imgradient.html)	\| Gradient magnitude and direction of an image
\| [`imgradientxy`](https://www.mathworks.com/help/images/ref/imgradientxy.html)	\| Directional gradients of an image
\| [`imgradient3`](https://www.mathworks.com/help/images/ref/imgradient3.html)	\| Find 3-D gradient magnitude and direction of images
\| [`imgradientxyz`](https://www.mathworks.com/help/images/ref/imgradientxyz.html)	\| Find the directional gradients of a 3-D image
\| [`hough`](https://www.mathworks.com/help/images/ref/hough.html)	\| Hough transform
\| [`houghlines`](https://www.mathworks.com/help/images/ref/houghlines.html)	\| Extract line segments based on Hough transform
\| [`houghpeaks`](https://www.mathworks.com/help/images/ref/houghpeaks.html)	\| Identify peaks in Hough transform
\| [`qtdecomp`](https://www.mathworks.com/help/images/ref/qtdecomp.html)	\| Quadtree decomposition
\| [`qtgetblk`](https://www.mathworks.com/help/images/ref/qtgetblk.html)	\| Block values in quadtree decomposition
\| [`qtsetblk`](https://www.mathworks.com/help/images/ref/qtsetblk.html)	\| Set block values in quadtree decomposition

Region and Image Properties

\| [`regionprops`](https://www.mathworks.com/help/images/ref/regionprops.html)	\| Measure properties of image regions
\| [`bwarea`](https://www.mathworks.com/help/images/ref/bwarea.html)	\| Area of objects in binary image
\| [`bwareafilt`](https://www.mathworks.com/help/images/ref/bwareafilt.html)	\| Extract objects from binary image by size
\| [`bwconncomp`](https://www.mathworks.com/help/images/ref/bwconncomp.html)	\| Find connected components in binary image
\| [`bwconvhull`](https://www.mathworks.com/help/images/ref/bwconvhull.html)	\| Generate convex hull image from binary image
\| [`bwdist`](https://www.mathworks.com/help/images/ref/bwdist.html)	\| Distance transform of binary image
\| [`bwdistgeodesic`](https://www.mathworks.com/help/images/ref/bwdistgeodesic.html)	\| Geodesic distance transform of binary image
\| [`bweuler`](https://www.mathworks.com/help/images/ref/bweuler.html)	\| Euler number of binary image
\| [`bwperim`](https://www.mathworks.com/help/images/ref/bwperim.html)	\| Find perimeter of objects in binary image
\| [`bwpropfilt`](https://www.mathworks.com/help/images/ref/bwpropfilt.html)	\| Extract objects from binary image using properties
\| [`bwselect`](https://www.mathworks.com/help/images/ref/bwselect.html)	\| Select objects in binary image
\| [`graydist`](https://www.mathworks.com/help/images/ref/graydist.html)	\| Gray-weighted distance transform of grayscale image
\| [`imcontour`](https://www.mathworks.com/help/images/ref/imcontour.html)	\| Create contour plot of image data
\| [`imhist`](https://www.mathworks.com/help/images/ref/imhist.html)	\| Histogram of image data
\| [`impixel`](https://www.mathworks.com/help/images/ref/impixel.html)	\| Pixel color values
\| [`improfile`](https://www.mathworks.com/help/images/ref/improfile.html)	\| Pixel-value cross-sections along line segments
\| [`corr2`](https://www.mathworks.com/help/images/ref/corr2.html)	\| 2-D correlation coefficient
\| [`mean2`](https://www.mathworks.com/help/images/ref/mean2.html)	\| Average or mean of matrix elements
\| [`std2`](https://www.mathworks.com/help/images/ref/std2.html)	\| Standard deviation of matrix elements
\| [`bwlabel`](https://www.mathworks.com/help/images/ref/bwlabel.html)	\| Label connected components in 2-D binary image
\| [`bwlabeln`](https://www.mathworks.com/help/images/ref/bwlabeln.html)	\| Label connected components in binary image
\| [`labelmatrix`](https://www.mathworks.com/help/images/ref/labelmatrix.html)	\| Create label matrix from bwconncomp structure
\| [`bwpack`](https://www.mathworks.com/help/images/ref/bwpack.html)	\| Pack binary image
\| [`bwunpack`](https://www.mathworks.com/help/images/ref/bwunpack.html)	\| Unpack binary image

Texture Analysis

\| [`entropy`](https://www.mathworks.com/help/images/ref/entropy.html)	\| Entropy of grayscale image
\| [`entropyfilt`](https://www.mathworks.com/help/images/ref/entropyfilt.html)	\| Local entropy of grayscale image
\| [`rangefilt`](https://www.mathworks.com/help/images/ref/rangefilt.html)	\| Local range of image
\| [`stdfilt`](https://www.mathworks.com/help/images/ref/stdfilt.html)	\| Local standard deviation of image
\| [`graycomatrix`](https://www.mathworks.com/help/images/ref/graycomatrix.html)	\| Create gray-level co-occurrence matrix from image
\| [`graycoprops`](https://www.mathworks.com/help/images/ref/graycoprops.html)	\| Properties of gray-level co-occurrence matrix

Image Quality

\| [`immse`](https://www.mathworks.com/help/images/ref/immse.html)	\| Mean-squared error
\| [`psnr`](https://www.mathworks.com/help/images/ref/psnr.html)	\| Peak Signal-to-Noise Ratio (PSNR)
\| [`ssim`](https://www.mathworks.com/help/images/ref/ssim.html)	\| Structural Similarity Index (SSIM) for measuring image quality

Image Segmentation

\| [`activecontour`](https://www.mathworks.com/help/images/ref/activecontour.html)	\| Segment image into foreground and background using active contour
\| [`imsegfmm`](https://www.mathworks.com/help/images/ref/imsegfmm.html)	\| Binary image segmentation using Fast Marching Method
\| [`imseggeodesic`](https://www.mathworks.com/help/images/ref/imseggeodesic.html)	\| Segment image into two or three regions using geodesic distance-based color segmentation
\| [`gradientweight`](https://www.mathworks.com/help/images/ref/gradientweight.html)	\| Calculate weights for image pixels based on image gradient
\| [`graydiffweight`](https://www.mathworks.com/help/images/ref/graydiffweight.html)	\| Calculate weights for image pixels based on grayscale intensity difference
\| [`grayconnected`](https://www.mathworks.com/help/images/ref/grayconnected.html)	\| Select contiguous image region with similar gray values
\| [`graythresh`](https://www.mathworks.com/help/images/ref/graythresh.html)	\| Global image threshold using Otsu's method
\| [`multithresh`](https://www.mathworks.com/help/images/ref/multithresh.html)	\| Multilevel image thresholds using Otsu's method
\| [`otsuthresh`](https://www.mathworks.com/help/images/ref/otsuthresh.html)	\| Global histogram threshold using Otsu's method
\| [`adaptthresh`](https://www.mathworks.com/help/images/ref/adaptthresh.html)	\| Adaptive image threshold using local first-order statistics
\| [`boundarymask`](https://www.mathworks.com/help/images/ref/boundarymask.html)	\| Find region boundaries of segmentation
\| [`superpixels`](https://www.mathworks.com/help/images/ref/superpixels.html)	\| 2-D superpixel oversegmentation of images
\| [`superpixels3`](https://www.mathworks.com/help/images/ref/superpixels3.html)	\| 3-D superpixel oversegmentation of 3-D image
\| [`imoverlay`](https://www.mathworks.com/help/images/ref/imoverlay.html)	\| Burn binary mask into 2-D image
\| [`label2idx`](https://www.mathworks.com/help/images/ref/label2idx.html)	\| Convert label matrix to cell array of linear indices

Image Transforms

\| [`bwdist`](https://www.mathworks.com/help/images/ref/bwdist.html)	\| Distance transform of binary image
\| [`bwdistgeodesic`](https://www.mathworks.com/help/images/ref/bwdistgeodesic.html)	\| Geodesic distance transform of binary image
\| [`graydist`](https://www.mathworks.com/help/images/ref/graydist.html)	\| Gray-weighted distance transform of grayscale image
\| [`hough`](https://www.mathworks.com/help/images/ref/hough.html)	\| Hough transform
\| [`dct2`](https://www.mathworks.com/help/images/ref/dct2.html)	\| 2-D discrete cosine transform
\| [`dctmtx`](https://www.mathworks.com/help/images/ref/dctmtx.html)	\| Discrete cosine transform matrix
\| [`fan2para`](https://www.mathworks.com/help/images/ref/fan2para.html)	\| Convert fan-beam projections to parallel-beam
\| [`fanbeam`](https://www.mathworks.com/help/images/ref/fanbeam.html)	\| Fan-beam transform
\| [`idct2`](https://www.mathworks.com/help/images/ref/idct2.html)	\| 2-D inverse discrete cosine transform
\| [`ifanbeam`](https://www.mathworks.com/help/images/ref/ifanbeam.html)	\| Inverse fan-beam transform
\| [`iradon`](https://www.mathworks.com/help/images/ref/iradon.html)	\| Inverse Radon transform
\| [`para2fan`](https://www.mathworks.com/help/images/ref/para2fan.html)	\| Convert parallel-beam projections to fan-beam
\| [`radon`](https://www.mathworks.com/help/images/ref/radon.html)	\| Radon transform
\| [`fft2`](https://www.mathworks.com/help/matlab/ref/fft2.html)	\| 2-D fast Fourier transform
\| [`fftshift`](https://www.mathworks.com/help/matlab/ref/fftshift.html)	\| Shift zero-frequency component to center of spectrum
\| [`ifft2`](https://www.mathworks.com/help/matlab/ref/ifft2.html)	\| 2-D inverse fast Fourier transform
\| [`ifftshift`](https://www.mathworks.com/help/matlab/ref/ifftshift.html)	\| Inverse FFT shift

3D Volumetric Image Processing

\| [`imboxfilt3`](https://www.mathworks.com/help/images/ref/imboxfilt3.html)	\| 3-D box filtering of 3-D images
\| [`imgaussfilt3`](https://www.mathworks.com/help/images/ref/imgaussfilt3.html)	\| 3-D Gaussian filtering of 3-D images
\| [`imgradient3`](https://www.mathworks.com/help/images/ref/imgradient3.html)	\| Find 3-D gradient magnitude and direction of images
\| [`imregdemons`](https://www.mathworks.com/help/images/ref/imregdemons.html)	\| Estimate displacement field that aligns two 2-D or 3-D images
\| [`integralBoxFilter3`](https://www.mathworks.com/help/images/ref/integralBoxFilter3.html)	\| 3-D box filtering of 3-D integral images
\| [`IntegralImage3`](https://www.mathworks.com/help/images/ref/IntegralImage3.html)	\| Calculate 3-D integral image
\| [`medfilt3`](https://www.mathworks.com/help/images/ref/medfilt3.html)	\| 3-D median filtering
\| [`superpixels3`](https://www.mathworks.com/help/images/ref/superpixels3.html)	\| 3-D superpixel oversegmentation of 3-D image
\| [`imref3d`](https://www.mathworks.com/help/images/ref/imref3d.html)	\| Reference 3-D image to world coordinates
\| [`affine3d`](https://www.mathworks.com/help/images/ref/affine3d.html)	\| 3-D Affine Geometric Transformation

Code Generation

\| [`adaptthresh`](https://www.mathworks.com/help/images/ref/adaptthresh.html)	\| Adaptive image threshold using local first-order statistics
\| [`boundarymask`](https://www.mathworks.com/help/images/ref/boundarymask.html)	\| Find region boundaries of segmentation
\| [`bwareaopen`](https://www.mathworks.com/help/images/ref/bwareaopen.html)	\| Remove small objects from binary image
\| [`bwboundaries`](https://www.mathworks.com/help/images/ref/bwboundaries.html)	\| Trace region boundaries in binary image
\| [`bwconncomp`](https://www.mathworks.com/help/images/ref/bwconncomp.html)	\| Find connected components in binary image
\| [`bwdist`](https://www.mathworks.com/help/images/ref/bwdist.html)	\| Distance transform of binary image
\| [`bweuler`](https://www.mathworks.com/help/images/ref/bweuler.html)	\| Euler number of binary image
\| [`bwlabel`](https://www.mathworks.com/help/images/ref/bwlabel.html)	\| Label connected components in 2-D binary image
\| [`bwlookup`](https://www.mathworks.com/help/images/ref/bwlookup.html)	\| Nonlinear filtering using lookup tables
\| [`bwmorph`](https://www.mathworks.com/help/images/ref/bwmorph.html)	\| Morphological operations on binary images
\| [`bwpack`](https://www.mathworks.com/help/images/ref/bwpack.html)	\| Pack binary image
\| [`bwperim`](https://www.mathworks.com/help/images/ref/bwperim.html)	\| Find perimeter of objects in binary image
\| [`bwselect`](https://www.mathworks.com/help/images/ref/bwselect.html)	\| Select objects in binary image
\| [`bwtraceboundary`](https://www.mathworks.com/help/images/ref/bwtraceboundary.html)	\| Trace object in binary image
\| [`bwunpack`](https://www.mathworks.com/help/images/ref/bwunpack.html)	\| Unpack binary image
\| [`conndef`](https://www.mathworks.com/help/images/ref/conndef.html)	\| Create connectivity array
\| [`demosaic`](https://www.mathworks.com/help/images/ref/demosaic.html)	\| Convert Bayer pattern encoded image to truecolor image
\| [`edge`](https://www.mathworks.com/help/images/ref/edge.html)	\| Find edges in intensity image
\| [`fitgeotrans`](https://www.mathworks.com/help/images/ref/fitgeotrans.html)	\| Fit geometric transformation to control point pairs
\| [`fspecial`](https://www.mathworks.com/help/images/ref/fspecial.html)	\| Create predefined 2-D filter
\| [`getrangefromclass`](https://www.mathworks.com/help/images/ref/getrangefromclass.html)	\| Default display range of image based on its class
\| [`grayconnected`](https://www.mathworks.com/help/images/ref/grayconnected.html)	\| Select contiguous image region with similar gray values
\| [`histeq`](https://www.mathworks.com/help/images/ref/histeq.html)	\| Enhance contrast using histogram equalization
\| [`hough`](https://www.mathworks.com/help/images/ref/hough.html)	\| Hough transform
\| [`houghlines`](https://www.mathworks.com/help/images/ref/houghlines.html)	\| Extract line segments based on Hough transform
\| [`houghpeaks`](https://www.mathworks.com/help/images/ref/houghpeaks.html)	\| Identify peaks in Hough transform
\| [`hsv2rgb`](https://www.mathworks.com/help/matlab/ref/hsv2rgb.html)	\| Convert HSV colormap to RGB colormap
\| [`im2double`](https://www.mathworks.com/help/matlab/ref/im2double.html)	\| Convert image to double precision
\| [`im2int16`](https://www.mathworks.com/help/images/ref/im2int16.html)	\| Convert image to 16-bit signed integers
\| [`im2single`](https://www.mathworks.com/help/images/ref/im2single.html)	\| Convert image to single precision
\| [`im2uint16`](https://www.mathworks.com/help/images/ref/im2uint16.html)	\| Convert image to 16-bit unsigned integers
\| [`im2uint8`](https://www.mathworks.com/help/images/ref/im2uint8.html)	\| Convert image to 8-bit unsigned integers
\| [`imabsdiff`](https://www.mathworks.com/help/images/ref/imabsdiff.html)	\| Absolute difference of two images
\| [`imadjust`](https://www.mathworks.com/help/images/ref/imadjust.html)	\| Adjust image intensity values or colormap
\| [`imbinarize`](https://www.mathworks.com/help/images/ref/imbinarize.html)	\| Binarize image by thresholding
\| [`imbothat`](https://www.mathworks.com/help/images/ref/imbothat.html)	\| Bottom-hat filtering
\| [`imboxfilt`](https://www.mathworks.com/help/images/ref/imboxfilt.html)	\| 2-D box filtering of images
\| [`imclearborder`](https://www.mathworks.com/help/images/ref/imclearborder.html)	\| Suppress light structures connected to image border
\| [`imclose`](https://www.mathworks.com/help/images/ref/imclose.html)	\| Morphologically close image
\| [`imcomplement`](https://www.mathworks.com/help/images/ref/imcomplement.html)	\| Complement image
\| [`imcrop`](https://www.mathworks.com/help/images/ref/imcrop.html)	\| Crop image
\| [`imdilate`](https://www.mathworks.com/help/images/ref/imdilate.html)	\| Dilate image
\| [`imerode`](https://www.mathworks.com/help/images/ref/imerode.html)	\| Erode image
\| [`imextendedmax`](https://www.mathworks.com/help/images/ref/imextendedmax.html)	\| Extended-maxima transform
\| [`imextendedmin`](https://www.mathworks.com/help/images/ref/imextendedmin.html)	\| Extended-minima transform
\| [`imfill`](https://www.mathworks.com/help/images/ref/imfill.html)	\| Fill image regions and holes
\| [`imfilter`](https://www.mathworks.com/help/images/ref/imfilter.html)	\| N-D filtering of multidimensional images
\| [`imfindcircles`](https://www.mathworks.com/help/images/ref/imfindcircles.html)	\| Find circles using circular Hough transform
\| [`imgaborfilt`](https://www.mathworks.com/help/images/ref/imgaborfilt.html)	\| Apply Gabor filter or set of filters to 2-D image
\| [`imgaussfilt`](https://www.mathworks.com/help/images/ref/imgaussfilt.html)	\| 2-D Gaussian filtering of images
\| [`imgradient3`](https://www.mathworks.com/help/images/ref/imgradient3.html)	\| Find 3-D gradient magnitude and direction of images
\| [`imgradientxyz`](https://www.mathworks.com/help/images/ref/imgradientxyz.html)	\| Find the directional gradients of a 3-D image
\| [`imhist`](https://www.mathworks.com/help/images/ref/imhist.html)	\| Histogram of image data
\| [`imhmax`](https://www.mathworks.com/help/images/ref/imhmax.html)	\| H-maxima transform
\| [`imhmin`](https://www.mathworks.com/help/images/ref/imhmin.html)	\| H-minima transform
\| [`imlincomb`](https://www.mathworks.com/help/images/ref/imlincomb.html)	\| Linear combination of images
\| [`immse`](https://www.mathworks.com/help/images/ref/immse.html)	\| Mean-squared error
\| [`imopen`](https://www.mathworks.com/help/images/ref/imopen.html)	\| Morphologically open image
\| [`imoverlay`](https://www.mathworks.com/help/images/ref/imoverlay.html)	\| Burn binary mask into 2-D image
\| [`impyramid`](https://www.mathworks.com/help/images/ref/impyramid.html)	\| Image pyramid reduction and expansion
\| [`imquantize`](https://www.mathworks.com/help/images/ref/imquantize.html)	\| Quantize image using specified quantization levels and output values
\| [`imread`](https://www.mathworks.com/help/matlab/ref/imread.html)	\| Read image from graphics file
\| [`imreconstruct`](https://www.mathworks.com/help/images/ref/imreconstruct.html)	\| Morphological reconstruction
\| [`imregionalmax`](https://www.mathworks.com/help/images/ref/imregionalmax.html)	\| Regional maxima
\| [`imregionalmin`](https://www.mathworks.com/help/images/ref/imregionalmin.html)	\| Regional minima
\| [`imresize`](https://www.mathworks.com/help/images/ref/imresize.html)	\| Resize image
\| [`imrotate`](https://www.mathworks.com/help/images/ref/imrotate.html)	\| Rotate image
\| [`imtophat`](https://www.mathworks.com/help/images/ref/imtophat.html)	\| Top-hat filtering
\| [`imtranslate`](https://www.mathworks.com/help/images/ref/imtranslate.html)	\| Translate image
\| [`imwarp`](https://www.mathworks.com/help/images/ref/imwarp.html)	\| Apply geometric transformation to image
\| [`integralBoxFilter`](https://www.mathworks.com/help/images/ref/integralBoxFilter.html)	\| 2-D box filtering of integral images
\| [`integralImage`](https://www.mathworks.com/help/images/ref/integralImage.html)	\| Calculate integral image
\| [`intlut`](https://www.mathworks.com/help/images/ref/intlut.html)	\| Convert integer values using lookup table
\| [`iptcheckmap`](https://www.mathworks.com/help/images/ref/iptcheckmap.html)	\| Check validity of colormap
\| [`iptcheckconn`](https://www.mathworks.com/help/images/ref/iptcheckconn.html)	\| Check validity of connectivity argument
\| [`lab2rgb`](https://www.mathworks.com/help/images/ref/lab2rgb.html)	\| Convert CIE 1976 Lab* to RGB
\| [`label2rgb`](https://www.mathworks.com/help/images/ref/label2rgb.html)	\| Convert label matrix into RGB image
\| [`label2idx`](https://www.mathworks.com/help/images/ref/label2idx.html)	\| Convert label matrix to cell array of linear indices
\| [`mean2`](https://www.mathworks.com/help/images/ref/mean2.html)	\| Average or mean of matrix elements
\| [`medfilt2`](https://www.mathworks.com/help/images/ref/medfilt2.html)	\| 2-D median filtering
\| [`multithresh`](https://www.mathworks.com/help/images/ref/multithresh.html)	\| Multilevel image thresholds using Otsu's method
\| [`ordfilt2`](https://www.mathworks.com/help/images/ref/ordfilt2.html)	\| 2-D order-statistic filtering
\| [`otsuthresh`](https://www.mathworks.com/help/images/ref/otsuthresh.html)	\| Global histogram threshold using Otsu's method
\| [`padarray`](https://www.mathworks.com/help/images/ref/padarray.html)	\| Pad array
\| [`psnr`](https://www.mathworks.com/help/images/ref/psnr.html)	\| Peak Signal-to-Noise Ratio (PSNR)
\| [`regionprops`](https://www.mathworks.com/help/images/ref/regionprops.html)	\| Measure properties of image regions
\| [`rgb2gray`](https://www.mathworks.com/help/matlab/ref/rgb2gray.html)	\| Convert RGB image or colormap to grayscale
\| [`rgb2hsv`](https://www.mathworks.com/help/matlab/ref/rgb2hsv.html)	\| Convert RGB colormap to HSV colormap
\| [`rgb2lab`](https://www.mathworks.com/help/images/ref/rgb2lab.html)	\| Convert RGB to CIE 1976 Lab*
\| [`rgb2ycbcr`](https://www.mathworks.com/help/images/ref/rgb2ycbcr.html)	\| Convert RGB color values to YCbCr color space
\| [`stretchlim`](https://www.mathworks.com/help/images/ref/stretchlim.html)	\| Find limits to contrast stretch image
\| [`superpixels`](https://www.mathworks.com/help/images/ref/superpixels.html)	\| 2-D superpixel oversegmentation of images
\| [`superpixels3`](https://www.mathworks.com/help/images/ref/superpixels3.html)	\| 3-D superpixel oversegmentation of 3-D image
\| [`watershed`](https://www.mathworks.com/help/images/ref/watershed.html)	\| Watershed transform
\| [`ycbcr2rgb`](https://www.mathworks.com/help/images/ref/ycbcr2rgb.html)	\| Convert YCbCr color values to RGB color space
\| [`imref2d`](https://www.mathworks.com/help/images/ref/imref2d.html)	\| Reference 2-D image to world coordinates
\| [`imref3d`](https://www.mathworks.com/help/images/ref/imref3d.html)	\| Reference 3-D image to world coordinates
\| [`affine2d`](https://www.mathworks.com/help/images/ref/affine2d.html)	\| 2-D Affine Geometric Transformation
\| [`projective2d`](https://www.mathworks.com/help/images/ref/projective2d.html)	\| 2-D Projective Geometric Transformation
\| [`strel`](https://www.mathworks.com/help/images/ref/strel.html)	\| Morphological structuring element
\| [`offsetstrel`](https://www.mathworks.com/help/images/ref/offsetstrel.html)	\| Morphological offset structuring element

GPU Computing

\| [`bwdist`](https://www.mathworks.com/help/images/ref/bwdist.html)	\| Distance transform of binary image
\| [`bwlabel`](https://www.mathworks.com/help/images/ref/bwlabel.html)	\| Label connected components in 2-D binary image
\| [`bwlookup`](https://www.mathworks.com/help/images/ref/bwlookup.html)	\| Nonlinear filtering using lookup tables
\| [`bwmorph`](https://www.mathworks.com/help/images/ref/bwmorph.html)	\| Morphological operations on binary images
\| [`corr2`](https://www.mathworks.com/help/images/ref/corr2.html)	\| 2-D correlation coefficient
\| [`edge`](https://www.mathworks.com/help/images/ref/edge.html)	\| Find edges in intensity image
\| [`histeq`](https://www.mathworks.com/help/images/ref/histeq.html)	\| Enhance contrast using histogram equalization
\| [`im2double`](https://www.mathworks.com/help/matlab/ref/im2double.html)	\| Convert image to double precision
\| [`im2single`](https://www.mathworks.com/help/images/ref/im2single.html)	\| Convert image to single precision
\| [`im2uint8`](https://www.mathworks.com/help/images/ref/im2uint8.html)	\| Convert image to 8-bit unsigned integers
\| [`im2uint16`](https://www.mathworks.com/help/images/ref/im2uint16.html)	\| Convert image to 16-bit unsigned integers
\| [`imabsdiff`](https://www.mathworks.com/help/images/ref/imabsdiff.html)	\| Absolute difference of two images
\| [`imadjust`](https://www.mathworks.com/help/images/ref/imadjust.html)	\| Adjust image intensity values or colormap
\| [`imbothat`](https://www.mathworks.com/help/images/ref/imbothat.html)	\| Bottom-hat filtering
\| [`imclose`](https://www.mathworks.com/help/images/ref/imclose.html)	\| Morphologically close image
\| [`imcomplement`](https://www.mathworks.com/help/images/ref/imcomplement.html)	\| Complement image
\| [`imdilate`](https://www.mathworks.com/help/images/ref/imdilate.html)	\| Dilate image
\| [`imerode`](https://www.mathworks.com/help/images/ref/imerode.html)	\| Erode image
\| [`imfill`](https://www.mathworks.com/help/images/ref/imfill.html)	\| Fill image regions and holes
\| [`imfilter`](https://www.mathworks.com/help/images/ref/imfilter.html)	\| N-D filtering of multidimensional images
\| [`imgradient`](https://www.mathworks.com/help/images/ref/imgradient.html)	\| Gradient magnitude and direction of an image
\| [`imgradientxy`](https://www.mathworks.com/help/images/ref/imgradientxy.html)	\| Directional gradients of an image
\| [`imhist`](https://www.mathworks.com/help/images/ref/imhist.html)	\| Histogram of image data
\| [`imlincomb`](https://www.mathworks.com/help/images/ref/imlincomb.html)	\| Linear combination of images
\| [`imnoise`](https://www.mathworks.com/help/images/ref/imnoise.html)	\| Add noise to image
\| [`ycbcr2rgb`](https://www.mathworks.com/help/images/ref/ycbcr2rgb.html)	\| Convert YCbCr color values to RGB color space
\| [`imopen`](https://www.mathworks.com/help/images/ref/imopen.html)	\| Morphologically open image
\| [`imreconstruct`](https://www.mathworks.com/help/images/ref/imreconstruct.html)	\| Morphological reconstruction
\| [`imregdemons`](https://www.mathworks.com/help/images/ref/imregdemons.html)	\| Estimate displacement field that aligns two 2-D or 3-D images
\| [`imresize`](https://www.mathworks.com/help/images/ref/imresize.html)	\| Resize image
\| [`imrotate`](https://www.mathworks.com/help/images/ref/imrotate.html)	\| Rotate image
\| [`imshow`](https://www.mathworks.com/help/images/ref/imshow.html)	\| Display image
\| [`imtophat`](https://www.mathworks.com/help/images/ref/imtophat.html)	\| Top-hat filtering
\| [`iradon`](https://www.mathworks.com/help/images/ref/iradon.html)	\| Inverse Radon transform
\| [`mat2gray`](https://www.mathworks.com/help/images/ref/mat2gray.html)	\| Convert matrix to grayscale image
\| [`mean2`](https://www.mathworks.com/help/images/ref/mean2.html)	\| Average or mean of matrix elements
\| [`medfilt2`](https://www.mathworks.com/help/images/ref/medfilt2.html)	\| 2-D median filtering
\| [`normxcorr2`](https://www.mathworks.com/help/images/ref/normxcorr2.html)	\| Normalized 2-D cross-correlation
\| [`padarray`](https://www.mathworks.com/help/images/ref/padarray.html)	\| Pad array
\| [`radon`](https://www.mathworks.com/help/images/ref/radon.html)	\| Radon transform
\| [`regionprops`](https://www.mathworks.com/help/images/ref/regionprops.html)	\| Measure properties of image regions
\| [`rgb2gray`](https://www.mathworks.com/help/matlab/ref/rgb2gray.html)	\| Convert RGB image or colormap to grayscale
\| [`rgb2ycbcr`](https://www.mathworks.com/help/images/ref/rgb2ycbcr.html)	\| Convert RGB color values to YCbCr color space
\| [`std2`](https://www.mathworks.com/help/images/ref/std2.html)	\| Standard deviation of matrix elements
\| [`stdfilt`](https://www.mathworks.com/help/images/ref/stdfilt.html)	\| Local standard deviation of image
\| [`stretchlim`](https://www.mathworks.com/help/images/ref/stretchlim.html)	\| Find limits to contrast stretch image