Legacy ImageMagick Discussions Archive

I am seeing quite a difference between compare -metric AE -fuzz in IM 6.9.9.10 Q16 (non-hdri) and IM 7.0.6.10 Q16 HDRI. Not only are the difference images not the same, but the counts are different.

Input pair:






magick compare -metric AE -fuzz 5% match1.png match2.png match_diff3_im7.png
219487





compare -metric AE -fuzz 5% match1.png match2.png match_diff3_im6.png
14133



I believe the bug is in IM 6, since if I increase the fuzz value, I see less red in IM 7 result, but still all red in the IM 6 result.

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.

I do not get any difference from before by using

In IM 7.0.7.0 Q16 and IM 6.9.9.10, the counts are now the same, but the resulting difference images are still different. The IM 6 result is completely red as above and the IM 7 result is not completely red. I think the IM 6 result might be wrong, since increase the fuzz value does not reduce the amount of red in the difference image.

compare -metric AE -fuzz 5% -channel rgb match1.png match2.png match_diff3_im6.png
219487

match_diff3_im6.png



magick compare -metric AE -fuzz 5% -channel rgb match1.png match2.png match_diff3_im7.png
219487

match_diff3_im7.png

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 @ https://www.imagemagick.org/download/beta/ by sometime tomorrow.

It seems to be fixed in IM 6.9.9.12 as of today's beta. Thanks