PDF color conversion problem on PPC machines

[zombor]

Hi, I am not sure if this is a bug in IM or Ghostscript. When converting from a PDF document to a raster image format (png for example), on PPC machines the colorspace comes out completely off. The same command on an Intel machine works fine. I'm assuming some endian-specific code is off somewhere. My command is:

/opt/local/bin/convert -sample 250 -colorspace CMYK 485ad067f1866.pdf[0] -colorspace RGB 485ad067f1866.png

You can see the resulting images below:

PPC:


Intel:

[magick]

Try this:

• /opt/local/bin/convert -colorspace RGB 485ad067f1866.pdf[0] -resize 250 485ad067f1866.png

Does that return identical renderings?

[zombor]

That command results in the same bright green on both platforms.

[magick]

The correct solution to this problem is to use two color profiles, generally a Swop for CMYK and an sRGB for RGB. First check to ensure LCMS is supported in your ImageMagick distribution otherwise you will get unexpected results. Type

• identify -list configure

and assure LCMS is associated with the DELEGATES tag.

[fmw42]

get LCMS deletegate at http://www.imagemagick.org/download/delegates/