Is "-colorspace" usage changed again in IM 6.7.6-5 Q16?

[henrywho]

Okay -> convert test.jpg -distort Resize 25% -quality 95% test_out1.jpg
Okay -> convert test.jpg -gamma 0.4545454545454545 -distort Resize 25% -gamma 2.2 -quality 95% test_out2.jpg
Too dark -> convert test.jpg -colorspace RGB -distort Resize 25% -colorspace sRGB -quality 95% test_out3.jpg

.... tested using Win32 Portable and Win64 DLL versions.

[fmw42]

RGB and sRGB were swapped as far as I know only at IM 6.7.5.5

But I will defer to the IM developers in case it accidentally got switched back.

[henrywho]

Also too dark -> convert test.jpg -colorspace sRGB -distort Resize 25% -colorspace RGB -quality 95% test_out4.jpg

[anthony]

Also too dark -> convert test.jpg -colorspace sRGB -distort Resize 25% -colorspace RGB -quality 95% test_out4.jpg

With the current IM, This devolves into the operations...

Code: Select all

convert {input} -distort Resize 25% -colorspace RGB  {result}

In other words you resize in sRGB and saved after converting from sRGB to RGB. Whcih would be too dark.

the right way to do colorspace corrected resize is now...

Code: Select all

   convert {input} -colorspace RGB -distort Resize 25% -colorspace sRGB  {result}

The gamma correctly resize has not changed.

See the updated IM Examples, Reszie with corrections
http://www.imagemagick.org/Usage/resize ... colorspace

[henrywho]

That's case (3) in my first post, where I got a dark image.

Actually, I suspect that it is a bug in the (various) Windows build of 6.7.6-5 Q16.