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Import, Export, and Conversion
Read and Write Image Data from Files
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Read image from graphics file |
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Write image to graphics file |
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Information about graphics file |
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Read metadata from National Imagery Transmission Format (NITF) file |
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Read image from NITF file |
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Read metadata from DPX file |
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Read DPX image |
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Read metadata from header file of Analyze 7.5 data set |
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Read image data from image file of Analyze 7.5 data set |
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Read metadata from Interfile file |
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Read images in Interfile format |
Read and Write Image Data from DICOM Files
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Anonymize DICOM file |
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Get or set active DICOM data dictionary |
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Display DICOM file structure |
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Read metadata from DICOM message |
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Find attribute in DICOM data dictionary |
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Read DICOM image |
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Generate DICOM unique identifier |
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Write images as DICOM files |
High Dynamic Range Images
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Read high dynamic range (HDR) image |
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Write Radiance high dynamic range (HDR) image file |
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Create high dynamic range image |
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Render high dynamic range image for viewing |
Large Image Files
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Interface for image I/O |
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Check if file is R-Set |
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Open R-Set file |
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Create reduced resolution data set from image file |
Image Type Conversion
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Convert grayscale or binary image to indexed image |
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Convert indexed image to grayscale image |
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Convert matrix to grayscale image |
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Convert RGB image or colormap to grayscale |
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Convert indexed image to RGB image |
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Convert label matrix into RGB image |
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Convert Bayer pattern encoded image to truecolor image |
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Binarize image by thresholding |
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Quantize image using specified quantization levels and output values |
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Multilevel image thresholds using Otsu's method |
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Adaptive image threshold using local first-order statistics |
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Global histogram threshold using Otsu's method |
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Global image threshold using Otsu's method |
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Convert grayscale image to indexed image using multilevel thresholding |
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Convert image to double precision |
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Convert image to 16-bit signed integers |
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Convert image to Java buffered image |
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Convert image to single precision |
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Convert image to 16-bit unsigned integers |
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Convert image to 8-bit unsigned integers |
Color
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Convert RGB to CIE 1976 L*a*b* |
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Convert RGB color values to NTSC color space |
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Convert RGB to CIE 1931 XYZ |
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Convert RGB color values to YCbCr color space |
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Convert CIE 1976 L*a*b* to RGB |
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Convert CIE 1976 L*a*b* to CIE 1931 XYZ |
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Convert CIE 1931 XYZ to CIE 1976 L*a*b* |
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Convert CIE 1931 XYZ to RGB |
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Convert YCbCr color values to RGB color space |
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Convert NTSC values to RGB color space |
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Convert L*a*b* data to double |
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Convert L*a*b* data to uint16 |
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Convert L*a*b* data to uint8 |
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Convert XYZ color values to double |
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Convert XYZ color values to uint16 |
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Search for ICC profiles |
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Read ICC profile |
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Find system default ICC profile repository |
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Write ICC color profile to disk file |
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True for valid ICC color profile |
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Create color transformation structure |
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Apply device-independent color space transformation |
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Approximate indexed image by reducing number of colors |
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Display 3-D color gamut as point cloud in specified color space |
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XYZ color values of standard illuminants |
Synthetic Images
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Create checkerboard image |
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Create head phantom image |
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Add noise to image |
Display and Exploration
Basic Display
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Display image |
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Display multiple image frames as rectangular montage |
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Make movie from multiframe image |
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Play movies, videos, or image sequences |
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Display image as texture-mapped surface |
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Get values of Image Processing Toolbox preferences |
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Display Image Processing Toolbox Preferences dialog box |
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Set Image Processing Toolbox preferences or display valid values |
Interactive Exploration with the Image Viewer App
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Image Viewer app |
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Image Information tool |
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Adjust Contrast tool |
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Display Range tool |
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Distance tool |
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Pixel Information tool |
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Pixel Information tool without text label |
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Pixel Region tool |
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Magnification box for scroll panel |
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Overview tool for image displayed in scroll panel |
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Get values of Image Processing Toolbox preferences |
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Display Image Processing Toolbox Preferences dialog box |
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Set Image Processing Toolbox preferences or display valid values |
Build Interactive Tools
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Image Information tool |
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Choose Colormap tool |
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Adjust Contrast tool |
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Crop image |
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Display Range tool |
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Distance tool |
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Pixel Information tool |
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Pixel Information tool without text label |
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Pixel Region tool |
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Pixel Region tool panel |
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Magnification box for scroll panel |
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Overview tool for image displayed in scroll panel |
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Overview tool panel for image displayed in scroll panel |
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Save Image Tool |
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Scroll panel for interactive image navigation |
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Create draggable ellipse |
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Create draggable freehand region |
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Create draggable, resizable line |
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Create draggable point |
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Create draggable, resizable polygon |
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Create draggable rectangle |
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Region-of-interest (ROI) base class |
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Select polyline with mouse |
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Specify points with mouse |
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Specify rectangle with mouse |
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Image data from axes |
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Image model object from image object |
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Image Model object |
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Convert axes coordinates to pixel coordinates |
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Information about image attributes |
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Get current axes containing image |
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Get current figure containing image |
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Display Open Image dialog box |
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Get all image objects |
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Add function handle to callback list |
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Check validity of handle |
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Get Application Programmer Interface (API) for handle |
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Retrieve pointer behavior from graphics object |
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Directories containing IPT and MATLAB icons |
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Create pointer manager in figure |
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Delete function handle from callback list |
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Store pointer behavior structure in graphics object |
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Align figure windows |
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Create rectangularly bounded drag constraint function |
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Adjust display size of image |
Geometric Transformation, Spatial Referencing, and Image Registration
Geometric Transformations
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Crop image |
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Resize image |
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Rotate image |
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Translate image |
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Image pyramid reduction and expansion |
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Apply geometric transformation to image |
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Fit geometric transformation to control point pairs |
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Apply 2-D spatial transformation to image |
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Find output bounds for spatial transformation |
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Flip input and output roles of TFORM structure |
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Create resampling structure |
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Create spatial transformation structure (TFORM) |
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Apply spatial transformation to N-D array |
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Apply forward spatial transformation |
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Apply inverse spatial transformation |
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Create checkerboard image |
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2-D Affine Geometric Transformation |
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3-D Affine Geometric Transformation |
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2-D Projective Geometric Transformation |
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2-D piecewise linear geometric transformation |
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2-D Polynomial Geometric Transformation |
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2-D Local Weighted Mean Geometric Transformation |
Spatial Referencing
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Apply geometric transformation to image |
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Intensity-based image registration |
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Estimate geometric transformation that aligns two 2-D or 3-D images |
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Display image |
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Compare differences between images |
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Composite of two images |
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Reference 2-D image to world coordinates |
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Reference 3-D image to world coordinates |
Automatic Registration
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Intensity-based image registration |
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Configurations for intensity-based registration |
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Estimate geometric transformation that aligns two 2-D or 3-D images |
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Estimates geometric transformation that aligns two 2-D images using phase correlation |
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Estimate displacement field that aligns two 2-D or 3-D images |
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Composite of two images |
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Compare differences between images |
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Mattes mutual information metric configuration object |
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Mean square error metric configuration object |
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Regular step gradient descent optimizer configuration object |
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One-plus-one evolutionary optimizer configuration object |
Control Point Registration
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Control Point Selection Tool |
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Fit geometric transformation to control point pairs |
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Tune control-point locations using cross correlation |
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Convert CPSTRUCT to valid pairs of control points |
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Normalized 2-D cross-correlation |
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Infer spatial transformation from control point pairs |
Image Enhancement
Contrast Adjustment
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Adjust image intensity values or colormap |
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Adjust Contrast tool |
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Sharpen image using unsharp masking |
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Fast Local Laplacian Filtering of images |
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Edge-aware local contrast manipulation of images |
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Render HDR image for viewing while enhancing local contrast |
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Enhance contrast using histogram equalization |
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Contrast-limited adaptive histogram equalization (CLAHE) |
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Adjust histogram of image to match N-bin histogram of reference image |
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Apply decorrelation stretch to multichannel image |
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Find limits to contrast stretch image |
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Convert integer values using lookup table |
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Add noise to image |
Image Filtering
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N-D filtering of multidimensional images |
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2-D Gaussian filtering of images |
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3-D Gaussian filtering of 3-D images |
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Create predefined 2-D filter |
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Guided filtering of images |
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Normalized 2-D cross-correlation |
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2-D adaptive noise-removal filtering |
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2-D median filtering |
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3-D median filtering |
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2-D order-statistic filtering |
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Local standard deviation of image |
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Local range of image |
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Local entropy of grayscale image |
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General sliding-neighborhood operations |
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Create Gabor filter or Gabor filter bank |
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Apply Gabor filter or set of filters to 2-D image |
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2-D box filtering of images |
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3-D box filtering of 3-D images |
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Calculate integral image |
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Calculate 3-D integral image |
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2-D box filtering of integral images |
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3-D box filtering of 3-D integral images |
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Extract objects from binary image by size |
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Extract objects from binary image using properties |
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Pad array |
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2-D frequency response |
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2-D FIR filter using frequency sampling |
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2-D FIR filter using frequency transformation |
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2-D FIR filter using 1-D window method |
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2-D FIR filter using 2-D window method |
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2-D convolution matrix |
Morphological Operations
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Binary hit-miss operation |
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Morphological operations on binary images |
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Ultimate erosion |
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Remove small objects from binary image |
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Bottom-hat filtering |
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Suppress light structures connected to image border |
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Morphologically close image |
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Dilate image |
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Erode image |
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Extended-maxima transform |
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Extended-minima transform |
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Fill image regions and holes |
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H-maxima transform |
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H-minima transform |
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Impose minima |
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Morphologically open image |
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Morphological reconstruction |
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Regional maxima |
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Regional minima |
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Top-hat filtering |
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Watershed transform |
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Create connectivity array |
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Check validity of connectivity argument |
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Neighborhood operations on binary images using lookup tables |
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Nonlinear filtering using lookup tables |
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Create lookup table for use with bwlookup |
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Morphological structuring element |
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Morphological offset structuring element |
Deblurring
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Deblur image using blind deconvolution |
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Deblur image using Lucy-Richardson method |
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Deblur image using regularized filter |
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Deblur image using Wiener filter |
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Taper discontinuities along image edges |
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Convert optical transfer function to point-spread function |
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Convert point-spread function to optical transfer function |
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Pad array |
ROI-Based Processing
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Specify polygonal region of interest (ROI) |
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Convert region of interest (ROI) polygon to region mask |
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Fill in specified regions in image using inward interpolation |
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Select region of interest (ROI) based on color |
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Filter region of interest (ROI) in image |
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Create draggable ellipse |
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Create draggable freehand region |
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Create draggable, resizable polygon |
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Create draggable rectangle |
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Region-of-interest (ROI) base class |
Neighborhood and Block Processing
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Interface for image I/O |
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Distinct block processing for image |
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Determine optimal block size for block processing |
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General sliding-neighborhood operations |
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Rearrange matrix columns into blocks |
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Columnwise neighborhood operations |
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Rearrange image blocks into columns |
Image Arithmetic
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Absolute difference of two images |
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Add two images or add constant to image |
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Linear combination of color channels |
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Complement image |
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Divide one image into another or divide image by constant |
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Linear combination of images |
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Multiply two images or multiply image by constant |
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Subtract one image from another or subtract constant from image |
Image Analysis
Object Analysis
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Trace region boundaries in binary image |
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Trace object in binary image |
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Plot region boundaries |
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Find edges in intensity image |
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Find circles using circular Hough transform |
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Create circle |
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Gradient magnitude and direction of an image |
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Directional gradients of an image |
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Find 3-D gradient magnitude and direction of images |
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Find the directional gradients of a 3-D image |
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Hough transform |
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Extract line segments based on Hough transform |
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Identify peaks in Hough transform |
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Quadtree decomposition |
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Block values in quadtree decomposition |
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Set block values in quadtree decomposition |
Region and Image Properties
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Measure properties of image regions |
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Area of objects in binary image |
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Extract objects from binary image by size |
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Find connected components in binary image |
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Generate convex hull image from binary image |
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Distance transform of binary image |
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Geodesic distance transform of binary image |
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Euler number of binary image |
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Find perimeter of objects in binary image |
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Extract objects from binary image using properties |
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Select objects in binary image |
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Gray-weighted distance transform of grayscale image |
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Create contour plot of image data |
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Histogram of image data |
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Pixel color values |
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Pixel-value cross-sections along line segments |
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2-D correlation coefficient |
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Average or mean of matrix elements |
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Standard deviation of matrix elements |
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Label connected components in 2-D binary image |
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Label connected components in binary image |
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Create label matrix from bwconncomp structure |
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Pack binary image |
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Unpack binary image |
Texture Analysis
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Entropy of grayscale image |
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Local entropy of grayscale image |
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Local range of image |
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Local standard deviation of image |
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Create gray-level co-occurrence matrix from image |
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Properties of gray-level co-occurrence matrix |
Image Quality
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Mean-squared error |
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Peak Signal-to-Noise Ratio (PSNR) |
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Structural Similarity Index (SSIM) for measuring image quality |
Image Segmentation
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Segment image into foreground and background using active contour |
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Binary image segmentation using Fast Marching Method |
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Segment image into two or three regions using geodesic distance-based color segmentation |
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Calculate weights for image pixels based on image gradient |
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Calculate weights for image pixels based on grayscale intensity difference |
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Select contiguous image region with similar gray values |
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Global image threshold using Otsu's method |
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Multilevel image thresholds using Otsu's method |
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Global histogram threshold using Otsu's method |
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Adaptive image threshold using local first-order statistics |
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Find region boundaries of segmentation |
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2-D superpixel oversegmentation of images |
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3-D superpixel oversegmentation of 3-D image |
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Burn binary mask into 2-D image |
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Convert label matrix to cell array of linear indices |
Image Transforms
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Distance transform of binary image |
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Geodesic distance transform of binary image |
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Gray-weighted distance transform of grayscale image |
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Hough transform |
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2-D discrete cosine transform |
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Discrete cosine transform matrix |
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Convert fan-beam projections to parallel-beam |
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Fan-beam transform |
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2-D inverse discrete cosine transform |
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Inverse fan-beam transform |
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Inverse Radon transform |
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Convert parallel-beam projections to fan-beam |
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Radon transform |
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2-D fast Fourier transform |
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Shift zero-frequency component to center of spectrum |
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2-D inverse fast Fourier transform |
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Inverse FFT shift |
3D Volumetric Image Processing
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3-D box filtering of 3-D images |
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3-D Gaussian filtering of 3-D images |
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Find 3-D gradient magnitude and direction of images |
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Estimate displacement field that aligns two 2-D or 3-D images |
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3-D box filtering of 3-D integral images |
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Calculate 3-D integral image |
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3-D median filtering |
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3-D superpixel oversegmentation of 3-D image |
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Reference 3-D image to world coordinates |
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3-D Affine Geometric Transformation |
Code Generation
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Adaptive image threshold using local first-order statistics |
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Find region boundaries of segmentation |
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Remove small objects from binary image |
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Trace region boundaries in binary image |
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Find connected components in binary image |
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Distance transform of binary image |
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Euler number of binary image |
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Label connected components in 2-D binary image |
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Nonlinear filtering using lookup tables |
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Morphological operations on binary images |
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Pack binary image |
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Find perimeter of objects in binary image |
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Select objects in binary image |
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Trace object in binary image |
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Unpack binary image |
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Create connectivity array |
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Convert Bayer pattern encoded image to truecolor image |
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Find edges in intensity image |
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Fit geometric transformation to control point pairs |
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Create predefined 2-D filter |
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Default display range of image based on its class |
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Select contiguous image region with similar gray values |
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Enhance contrast using histogram equalization |
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Hough transform |
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Extract line segments based on Hough transform |
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Identify peaks in Hough transform |
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Convert HSV colormap to RGB colormap |
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Convert image to double precision |
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Convert image to 16-bit signed integers |
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Convert image to single precision |
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Convert image to 16-bit unsigned integers |
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Convert image to 8-bit unsigned integers |
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Absolute difference of two images |
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Adjust image intensity values or colormap |
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Binarize image by thresholding |
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Bottom-hat filtering |
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2-D box filtering of images |
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Suppress light structures connected to image border |
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Morphologically close image |
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Complement image |
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Crop image |
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Dilate image |
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Erode image |
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Extended-maxima transform |
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Extended-minima transform |
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Fill image regions and holes |
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N-D filtering of multidimensional images |
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Find circles using circular Hough transform |
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Apply Gabor filter or set of filters to 2-D image |
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2-D Gaussian filtering of images |
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Find 3-D gradient magnitude and direction of images |
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Find the directional gradients of a 3-D image |
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Histogram of image data |
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H-maxima transform |
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H-minima transform |
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Linear combination of images |
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Mean-squared error |
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Morphologically open image |
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Burn binary mask into 2-D image |
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Image pyramid reduction and expansion |
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Quantize image using specified quantization levels and output values |
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Read image from graphics file |
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Morphological reconstruction |
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Regional maxima |
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Regional minima |
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Resize image |
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Rotate image |
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Top-hat filtering |
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Translate image |
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Apply geometric transformation to image |
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2-D box filtering of integral images |
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Calculate integral image |
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Convert integer values using lookup table |
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Check validity of colormap |
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Check validity of connectivity argument |
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Convert CIE 1976 L*a*b* to RGB |
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Convert label matrix into RGB image |
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Convert label matrix to cell array of linear indices |
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Average or mean of matrix elements |
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2-D median filtering |
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Multilevel image thresholds using Otsu's method |
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2-D order-statistic filtering |
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Global histogram threshold using Otsu's method |
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Pad array |
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Peak Signal-to-Noise Ratio (PSNR) |
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Measure properties of image regions |
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Convert RGB image or colormap to grayscale |
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Convert RGB colormap to HSV colormap |
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Convert RGB to CIE 1976 L*a*b* |
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Convert RGB color values to YCbCr color space |
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Find limits to contrast stretch image |
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2-D superpixel oversegmentation of images |
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3-D superpixel oversegmentation of 3-D image |
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Watershed transform |
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Convert YCbCr color values to RGB color space |
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Reference 2-D image to world coordinates |
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Reference 3-D image to world coordinates |
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2-D Affine Geometric Transformation |
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2-D Projective Geometric Transformation |
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Morphological structuring element |
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Morphological offset structuring element |
GPU Computing
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Distance transform of binary image |
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Label connected components in 2-D binary image |
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Nonlinear filtering using lookup tables |
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Morphological operations on binary images |
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2-D correlation coefficient |
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Find edges in intensity image |
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Enhance contrast using histogram equalization |
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Convert image to double precision |
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Convert image to single precision |
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Convert image to 8-bit unsigned integers |
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Convert image to 16-bit unsigned integers |
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Absolute difference of two images |
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Adjust image intensity values or colormap |
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Bottom-hat filtering |
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Morphologically close image |
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Complement image |
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Dilate image |
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Erode image |
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Fill image regions and holes |
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N-D filtering of multidimensional images |
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Gradient magnitude and direction of an image |
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Directional gradients of an image |
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Histogram of image data |
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Linear combination of images |
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Add noise to image |
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Convert YCbCr color values to RGB color space |
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Morphologically open image |
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Morphological reconstruction |
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Estimate displacement field that aligns two 2-D or 3-D images |
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Resize image |
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Rotate image |
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Display image |
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Top-hat filtering |
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Inverse Radon transform |
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Convert matrix to grayscale image |
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Average or mean of matrix elements |
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2-D median filtering |
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Normalized 2-D cross-correlation |
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Pad array |
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Radon transform |
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Measure properties of image regions |
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Convert RGB image or colormap to grayscale |
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Convert RGB color values to YCbCr color space |
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Standard deviation of matrix elements |
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Local standard deviation of image |
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Find limits to contrast stretch image |
