Ticket #1802 (closed defect: moved)

Opened 6 years ago

Last modified 6 years ago

Contrast adjusting not like IJ1

Reported by: bdezonia Owned by: bdezonia
Priority: major Milestone: imagej2-b8-analysis
Component: Analysis Plugins Version:
Severity: serious Keywords:
Cc: G.Landini@… Blocked By:
Blocking: #1100


In the imagej devel maling list Gabriel Landini noted the following issues with the Brightness/Contrast plugin:

Compare Contrast in IJ1 with IJ2. In IJ2 the contrast does not respect the brightness, as (without any brightness tweaking) the contrast should narrow the LUT to 127 or so. Currently IJ2 at 100 setting of contrast has a minimum of 0 and a maximum of 4.67 (?). I think contrast should control the width of the LUT from both sides, while keeping it centred. Currently it affects the max value and as a consequence it changes both the width and the position of the lut. So "Contrast" behaves same the "Maximum" slider of IJ1.

Change History

comment:1 Changed 6 years ago by bdezonia

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

comment:2 Changed 6 years ago by curtis

I haven't worked on fixing this yet, but just wanted to mention that I agree with Gabriel's assessment. B&C needs to work like it does in IJ1. This is my fault, since the way I implemented the math in IJ2's B&C command differs.

comment:3 Changed 4 years ago by curtis

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