[wp-trac] [WordPress Trac] #39331: unsharpMaskImage in Imagick's thumbnail_image is not compatible with CMYK jpegs.

[WordPress Trac]

#39331: unsharpMaskImage in Imagick's thumbnail_image is not compatible with CMYK
jpegs.
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 Reporter:  gitlost       |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Media         |     Version:  4.5
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by gitlost):

 Looks like it's probably this
 [https://github.com/ImageMagick/ImageMagick/issues/299 ImageMagick bug
 299] - after manually updating ImageMagick on Ubuntu 16.10 to 6.9.6-8 (the
 standard package is at 6.8.9-9) then `convert test_cmyk.jpg -unsharp
 0.25x0.25+8+0.065 out.jpg` works correctly, whereas before it didn't.

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Ticket URL: <https://core.trac.wordpress.org/ticket/39331#comment:1>
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