Legacy ImageMagick Discussions Archive

Ah, thanks for the clarification, fmw42. It looks like I had a fundamental misunderstanding of what the -colorspace option does. In fact, the thing I wanted to do was use -profile with a downloaded copy of an sRGB ICC profile.

For future readers, what I did was download the "PC version" of the sRGB ...

I believe I've tracked this down to a change between 6.7.6-10 and 6.7.7-10. Running

convert rose: -colorspace gray -type truecolor rose_gray.jpg
with 6.7.6-10 results in a file that opens in RGB mode in GIMP 2.8.6, but 6.7.7-10 outputs a file that opens in Grayscale mode.

I built my binaries in ...

I've found what seems to be a regression in handling of embedded color profiles in JPEGs between 6.8.6-10 and 6.8.7-10.

I took the test Landscape_2.jpg image from https://github.com/recurser/exif-orientation-examples and attempted to normalize it to sRGB colorspace by running

convert Landscape_2 ...

Ah, I see now that GreenKoopa's test is not quite correct. However, my original point still stands. When I run

convert 3.jpg -type TrueColor 3-out.jpg
and open 3-out.jpg in GIMP, GIMP tells me the image mode is Grayscale. However, when I follow snibgo's workaround:

But if the image might ...

For sure here it is:
http://wideortest.s3.amazonaws.com/640x480_5_multipleformat/3.jpg
convert gray.jpg -type TrueColor gray_to_rgb.jpg
convert gray_to_rgb.jpg -format "%r %[channels] %[colorspace]" info:-
PseudoClass Gray gray Gray <= Case 5: fail (the case lahabana needed)
Its a bug and its ...