NOTICE! This is a static HTML version of a legacy ImageJ Trac ticket.

The ImageJ project now uses GitHub Issues for issue tracking.

Please file all new issues there.

Ticket #1316 (closed defect: worksforme)

Opened 2012-07-11T12:32:50-05:00

Last modified 2013-06-12T14:08:04-05:00

Example where Brightness/Contrast issues are apparent

Reported by: bdezonia Owned by: bdezonia
Priority: minor Milestone: imagej2-b8-analysis
Component: Legacy Compatibility Version:
Severity: serious Keywords:
Cc: Blocked By:
Blocking: #1100

Description (last modified by bdezonia)

Use the attached file for a mask in the Process > FFT > Custom Filter command.
Open the mask
Open Neuron
Run the Process > FFT > Custom Filter command (using mask and checking process whole stack)
IJ2 results are visually different from IJ1 results.
This all may just be brightness and contrast issues but I can't figure out how to adjust them correctly. The pixel probe on slice number 5 shows different pixel values than IJ1. Signed 16-bit vs. Unsigned 16-bit?


5x5mask.tif (173 bytes) - added by bdezonia 2012-07-11T12:34:25-05:00.
The mask to use with command
5x5BetterMask.tif (173 bytes) - added by bdezonia 2012-07-11T12:43:30-05:00.
The mask less likely to overflow

Change History

comment:1 Changed 2012-07-11T12:33:10-05:00 by bdezonia

  • Description modified

Changed 2012-07-11T12:34:25-05:00 by bdezonia

The mask to use with command

comment:2 Changed 2012-07-11T12:43:02-05:00 by bdezonia

The given mask has pixel values of 0 and 255. These likely cause overflow. Using a mask with values of 0 & 9 shows the two commands work the same. One just has to fiddle the brightness and contrast of each channel (getting values from IJ1) to see the pixels match. More than anything this points out how messed up brightness and contrast is.

Changed 2012-07-11T12:43:30-05:00 by bdezonia

The mask less likely to overflow

comment:3 Changed 2012-07-12T11:43:09-05:00 by bdezonia

  • Description modified
  • Summary changed from Process > FFT > Custom Filter: broken but not sure how to Example where Brightness/Contrast issues are apparent

comment:4 Changed 2012-07-16T14:07:47-05:00 by bdezonia

  • Blocking 1100 added

comment:5 Changed 2012-08-14T11:14:03-05:00 by curtis

  • Priority changed from major to minor

comment:6 Changed 2012-09-06T14:26:23-05:00 by curtis

  • Milestone changed from imagej-2.0.0-beta4 to imagej-2.0.0-beta5

comment:7 Changed 2013-06-04T12:42:35-05:00 by bdezonia

  • Milestone changed from imagej2-b7-ndim-data to imagej2-b8-analysis

comment:8 Changed 2013-06-12T14:08:04-05:00 by bdezonia

  • Status changed from new to closed
  • Resolution set to worksforme

Retested post beta 7. There really is no effective difference between IJ1 and IJ2 here. Closing.