UIImage-PDF color issue

[oliverwolfson]

Thanks so much for making your PDF and SVG code available Nigel.

Any links to information on how to calibrate the color display for PDFs? There is a pretty big discrepancy between how PDFs and PNGs are displayed.

You can see an example here: http://owolf.net/images/apps/pdfvspng.png

The upper left is a PDF displayed via one of your methods. The lower right is a PNG. Note the PDF in much darker, as if it's in a completely different color space.

[mindbrix]

Hi Oliver. I'm glad you find the code useful. What tools did you use to
create the PNG? Photoshop provides a number of colour space options for
image exporting. I've seen similar issues matching CSS colours to JPGs on
websites, which were fixed by choosing the correct export colour space.

Sadly iOS provides no colour calibration APIs, so I have no control over
the colours used by the Quartz PDF renderer.

Best,
Nigel.

On 16 May 2012 14:28, oliverwolfson <
reply@reply.github.com

wrote:

Thanks so much for making your PDF and SVG code available Nigel.

Any links to information on how to calibrate the color display for PDFs?
There is a pretty big discrepancy between how PDFs and PNGs are displayed.

You can see an example here: http://owolf.net/images/apps/pdfvspng.png

The upper left is a PDF displayed via one of your methods. The lower right
is a PNG. Note the PDF in much darker, as if it's in a completely different
color space.

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[oliverwolfson]

Thanks for the quick reply Nigel. Actually it turned out to be an easy fix. Changed the document color mode to RGB, from CMYK in illustrator and it looks good now.

Best,
Oliver

[mindbrix]

You're welcome. ;-)