Legacy ImageMagick Discussions Archive

Darwin Kernel Version 10.4.0
ImageMagick 6.6.3-0 2010-07-06 Q16

I use a lot of custom CMYK profiles that are a few megabytes in size due to large lookup tables. Converting the TIF and PSD below both yield a valid sRGB embedded jpeg file. But the jpeg from the PSD weighs in at over 3MB, about the size of the profile. If I further run a convert -strip -profile 'sRGB_IEC61966-2-1_black_scaled.icc' command, then the jpeg is the proper size and correct. Seems like past profiles are not always removed correctly. Or is this behavior intended?

tiftest.tif TIFF 6990x8620 6990x8620+0+0 8-bit DirectClass 244.5MB 0.030u 0:00.029

• Creator Tool : Adobe Photoshop CS3 Macintosh
  Profile Description : X_GRACoL_2008.icc
  ICC Profile Name : X_GRACoL_2008.icc

convert -profile 'X_GRACoL_2008.icc' -profile 'sRGB_IEC61966-2-1_black_scaled.icc' -alpha off 'tiftest.tif'[0] -resize '2000x2000>' tiftest.jpg

tiftest.jpg JPEG 1258x1551 1258x1551+0+0 8-bit DirectClass 261KB 0.000u 0:00.000

• Creator Tool : Adobe Photoshop CS3 Macintosh
  Profile Description : sRGB IEC61966-2-1 black scaled
  ICC Profile Name : X_GRACoL_2008.icc

psdtest.psd PSD 6990x8620 6990x8620+0+0 8-bit DirectClass 279.6MB 0.160u 0:00.100

• Creator Tool : Adobe Photoshop CS3 Macintosh
  Profile Description : X_GRACoL_2008.icc
  ICC Profile Name : X_GRACoL_2008.icc

convert -profile 'X_GRACoL_2008.icc' -profile 'sRGB_IEC61966-2-1_black_scaled.icc' -alpha off 'psdtest.psd'[0] -resize '2000x2000>' psdtest.jpg

psdtest.jpg JPEG 1258x1551 1258x1551+0+0 8-bit DirectClass 3.721MB 0.030u 0:00.029

• Creator Tool : Adobe Photoshop CS3 Macintosh
  Profile Description : sRGB IEC61966-2-1 black scaled
  ICC Profile Name : X_GRACoL_2008.icc

-strip
psdclear.jpg JPEG 1258x1551 1258x1551+0+0 8-bit DirectClass 197KB 0.000u 0:00.000

If in.tif has a profile, any profile, which you want to convert it to XYZ.icc:

convert in.tif -profile XYZ.icc out.jpg

Note the "-profile" and other commands go between the file names, and I don't tell IM the existing profile of in.tif.

The result is the same with that syntax.

Can you post a sample?

You can recreate that behaviour if you use profiles. Example: That should convert the RGB image to CMYK and embed the CMYK profile. The conversion is successful, but with PSD as input, the embedding of the profiles can get.. strange:
identify -verbose rosetest.jpg
...
Profiles:
Profile-8bim: 3184 bytes
Profile-icc: 560312 bytes
Description: sRGB IEC61966-2.1
Manufacturer: IEC http://www.iec.ch
Model: IEC 61966-2.1 Default RGB colour space - sRGB
Copyright: Copyright (c) 1998 Hewlett-Packard Company
...
The result in this special CMYK file: 'Profile-8bim' has the sRGB color profile (the sRGB profile itself has 3.144 Bytes) , and 'Profile-icc' shows a mix of two profiles (the above used CMYK profile itself has 557.168 Bytes).

There was a similar case in this thread:
viewtopic.php?f=1&t=16109

One part of the problem is the color profile detection within PSD.
convert rose: -profile "sRGB IEC61966-2.1.icc" rose.psd
identify -verbose rose.psd
...
Profiles:
Profile-8bim: 3184 bytes
Profile-icc: 3144 bytes
Description: sRGB IEC61966-2.1
Manufacturer: IEC http://www.iec.ch
Model: IEC 61966-2.1 Default RGB colour space - sRGB
Copyright: Copyright (c) 1998 Hewlett-Packard Company
...
It's only one color profile that is stored within the PSD file, but ImageMagick shows it also as Photoshop profile. When a color conversion with profiles is done, the input 'Profile-icc' doesn't get embedded in the output file. So far, so good. But the 'Profile-8bim' gets transferred to the output file. So, usually, with such a conversion - with PSD as input - the ICC profile shows the destination color profile, and the 8bim profile has the source color profile in the final output.
And, as in my rosetest example, in some cases the ICC profile shows even a mix (but it's not yet stored as that!). Now, if I store the color profile with "convert rosetest.jpg ICC:rose-profile.icc", I get a 560KB sRGB profile.

As workaround, one has to strip the Photoshop profile at least:

This appears to be a bug that is specific to reading PSD files. (Windows 7, IM 6.6.2-4.)

The following works as I would expect:
But when the intermediate file is PSD format: I note the size of the ICC profile in r2b.jpg is 560312, which equals 557168 plus 3144.

I would expect the ICC profile of r2b.jpg to be identical to that of r2.jpg.

I think this is consistent with Drarekel's report.

Thanks. +profile "8bim" is an excellent solution to the problem for the time being.