v7 -equalize with -channel

[snibgo]

In v6, "-equalize" is sensitive to "-channel", so we could equalize channels independently.

In v7, a "-channel" setting does not affect the behaviour of "-equalize". I assume this is a bug.

For example, where %IM% is v6.9.2-5 and %IMG7% is v7.0.1-3:

Code: Select all

set SRC=toes.jpg

%IM%convert ^
  %SRC% ^
  -equalize ^
  equ_v6.jpg

%IM%convert ^
  %SRC% ^
  -channel RGB ^
  -equalize ^
  equ_v6_rgb.jpg

%IMG7%magick ^
  %SRC% ^
  -equalize ^
  equ_v7.jpg

%IMG7%magick ^
  %SRC% ^
  -channel RGB ^
  -equalize ^
  equ_v7_rgb.jpg

Input toes.jpg:


Output v6 without channel setting:


Output v6 with channel setting:


Output v7 without channel setting:


Output v7 with channel setting:


The v7 outputs are the same as each other, and the same as v6 without the channel setting.

[fmw42]

I can verify the same on my Mac OSX the same with IM 6.9.4.2 and 7.0.1.4.

[magick]

Thanks for the problem report. We can reproduce it and will have a patch to fix it in GIT master branch @ https://github.com/ImageMagick/ImageMagick later today. The patch will be available in the beta releases of ImageMagick @ http://www.imagemagick.org/download/beta/ by sometime tomorrow.