[FIXED] possible bug output -colorspace RGB is gamma=0.4545

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[FIXED] possible bug output -colorspace RGB is gamma=0.4545

Postby fmw42 » 2013-07-08T18:34:49+00:00

There is a change in IM between IM 6.8.5.10 and 6.8.6.0 where the output from -colorspace RGB is producing gamma=0.4545 rather than gamma=1.

This is a followup from viewtopic.php?f=3&t=23707



im68510 convert rose: -colorspace RGB -write show: -format "%[gamma]" info:
1

im6860 convert rose: -colorspace RGB -write show: -format "%[gamma]" info:
0.454545

IM 6863
convert rose: -colorspace RGB -write show: -format "%[info:]"
0.454545

IM 6864 beta
imb convert rose: -colorspace RGB -write show: -format "%[gamma]" info:
0.454545


Oddly all these images view darker as if gamma=1. However, all but the first are labeled with gamma=0.4545
Last edited by fmw42 on 2013-07-10T09:55:29+00:00, edited 1 time in total.
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Re: possible bug output from -colorspace RGB is gamma=0.4545

Postby magick » 2013-07-09T04:35:35+00:00

We can reproduce the problem you posted and have a patch in ImageMagick 6.8.6-4 Beta available by sometime tomorrow. Thanks.
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Re: possible bug output from -colorspace RGB is gamma=0.4545

Postby fmw42 » 2013-07-10T09:54:47+00:00

This is fixed in IM 6.8.6.4. Thanks.
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