Discussion:
negative colors in OSX cymk images
blau
2010-10-16 12:16:22 UTC
Permalink
I received some jpg and psd images that were generated in Mac OSX. After
converting to jpg in several flavors, some are appearing negative
(colors inverted) under Mac OSX.

I have used convert -strip -quality 85 plus some resize.

The images are here:

http://mauta.net/imagemagick/

56_Rotanti_Ticino_1968_1_Mulas-gimp.jpg
56_Rotanti_Ticino_1968_1_Mulas.psd
56_Rotanti_Ticino_1968_1_Mulas-strip-quality85-resize415.jpg
56_Rotanti_Ticino_1968_1_Mulas-original.jpg
56_Rotanti_Ticino_1968_1_Mulas-strip-quality85.jpg

It seems this is a known issue for cymk jpg in OSX. Anybody knows of a
workaround?

Blau
Fred Weinhaus
2010-10-16 16:44:02 UTC
Permalink
This has been discussed on the Discourse server forums with no good
solution except to add -negate.\

http://www.imagemagick.org/discourse-server/
Post by blau
I received some jpg and psd images that were generated in Mac OSX. After
converting to jpg in several flavors, some are appearing negative
(colors inverted) under Mac OSX.
I have used convert -strip -quality 85 plus some resize.
http://mauta.net/imagemagick/
56_Rotanti_Ticino_1968_1_Mulas-gimp.jpg
56_Rotanti_Ticino_1968_1_Mulas.psd
56_Rotanti_Ticino_1968_1_Mulas-strip-quality85-resize415.jpg
56_Rotanti_Ticino_1968_1_Mulas-original.jpg
56_Rotanti_Ticino_1968_1_Mulas-strip-quality85.jpg
It seems this is a known issue for cymk jpg in OSX. Anybody knows of a
workaround?
Blau
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