[wp-trac] [WordPress Trac] #57085: Media autoscale threshold change picture's colors

[WordPress Trac]

#57085: Media autoscale threshold change picture's colors
--------------------------+-----------------------------
 Reporter:  fernandot     |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Media         |    Version:  6.1
 Severity:  major         |   Keywords:  needs-patch
  Focuses:                |
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 When uploading a picture, the automatic autoscale threshold (2560) changes
 the picture's colors to a different color profile (fewer colors, less
 vivid)

 I've deactivated the automatic autoscale with
 {{{
 add_filter('big_image_size_threshold', '__return_false');
 }}}
 and the issue disappears

 This is a big problem for photography-related blogs or websites, where
 photo quality makes the difference.

 It's ok to scale the images for better performance, but we should be able
 to avoid it without loss of quality.

 Note: I've tried to remove the jpg quality loss applied by WordPress and
 that's not the problem, the problem comes with the autoscale.

 (Attached: image file without autoscale, image file with autoscale)
 [[Image(https://aulawp.com/web/wp-content/uploads/2022/11/prueba-
 Barbeiro-5670.jpg)]]
 [[Image(https://aulawp.com/web/wp-content/uploads/2022/11/prueba-
 Barbeiro-5670-1-scaled.jpg)]]

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Ticket URL: <https://core.trac.wordpress.org/ticket/57085>
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