Photoshop: Split channels on large CMYK files gives glitches when converted to bitmap or saved as tiff

  • 1
  • Problem
  • Updated 2 years ago
  • Solved
  • (Edited)
This has happened to me on CS6 and now with CC on OSX running El Capitan. When I split channels on a large CMYK file the resulting files look fine, but when I convert them to bitmap or save them as a grayscale .tiff or .psd I wind up with glitched files. This does not happen if I cut and paste the channel into a new grayscale file, so I think it is a bug in the split channels code. Original CMYK file was 7393x5700 pixels

BITMAPPED WITH A HALFTONE SCREEN




SAVED AND REOPENED AS A GRAYSCALE TIFF


ORIGINAL IMAGE AFTER SPLITTING CHANNELS ( BLACK CHANNEL )
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Karl LaRocca

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Posted 3 years ago

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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Official Response
That was the secret. I have a repro case now. Engineering will look into it. Thanks for your help!
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Official Response