RGB to CMYK

[ggssdd]

My problem is that black point balance cannot be adjusted on same way. What I get is to bright image:
$imCommand="convert '".$this->backSrcUrl."' -colorspace CMYK -intent relative -black-point-compensation -profile '".$CMYKProfile."' '".$tmpBck."' ";
Also, after embedding a few of transformed images in pdf using pdfLib, Adobe acrobat reports that rendering intent is perceptual. It is also possible that I've missed some way in pdfLib to adjust that too... IM version is 6.3.2.9. running at suse 10…

[magick]

ImageMagick supports black point compensation. Use the -black-point-compensation option.

[ggssdd]

But I did:
$imCommand="convert '".$this->backSrcUrl."' -colorspace CMYK -intent relative -black-point-compensation -profile '".$CMYKProfile."' '".$tmpBck."' ";
Maybe order of commands isn't good?

[ggssdd]

For