Ticket #1100 (new feature) — at Version 1

Opened 8 years ago

Last modified 7 years ago

Brightness and Contrast improvements

Reported by: bdezonia Owned by: curtis
Priority: minor Milestone: imagej2-b8-analysis
Component: Display API Version: 2.0.0-beta6
Severity: serious Keywords:
Cc: G.Landini@…, Michael.Cammer@… Blocked By:

Description (last modified by curtis) (diff)

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

  1. I can't do anything else until I close the dialog. For example, IJ2 does not report pixel the values under the cursor until the brightness dialog is closed. Is that how it is planned to work?
  1. Dialog needs "reset" and "apply" buttons.
  1. Minimum and maximum return fractional values for an 8 bit LUT. Is that right?
  1. Are the Brightness and Contrast values (0-100?) the best scale resolution to use?. I think that having 100 units controlling LUTs with 256 values at least for 8 bit images will create unnecessary hassle (like the fractional values mentioned above). I can't see any advantage on 0-100 vs 0-255 (but maybe there is some reason?).
  1. 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.
  1. Maybe Maximum and Minimum would be more useful having sliders too instead of number boxes.

Change History

comment:1 Changed 8 years ago by curtis

  • Type changed from defect to feature
  • Description modified (diff)
  • Summary changed from Brightness and Contrast dialog issues 2 to Brightness and Contrast improvements
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