[wp-trac] [WordPress Trac] #30402: medium image size may be larger than full image size

[WordPress Trac]

#30402: medium image size may be larger than full image size
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 Reporter:  qdinar        |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Media         |     Version:  3.9.2
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |     Focuses:
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Comment (by dnewton):

 Replying to [comment:7 DH-Shredder]:
 > While I can see how dithered images could look moderately better, I'd
 tend to think the more expected behavior from users would be to maintain
 bit-depth where we can. Do you have some examples of images where
 maintaining bit-depth during resize is particularly undesirable?

 I haven't checked that exactly. I have looked at lowering bit depth in
 general, but just to arbitrary levels, not based on what the input was.
 I've also looked at matching the number of colours in the output to the
 number of colours in the input. Both of those had fairly bad results — the
 image quality suffered quite a bit. If there's interest, I can queue up a
 test for maintaining original bit depth for sometime over the next couple
 of weeks.

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Ticket URL: <https://core.trac.wordpress.org/ticket/30402#comment:8>
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