[wp-trac] [WordPress Trac] #28634: jpeg_quality hook fake compress images

[WordPress Trac]

#28634: jpeg_quality hook fake compress images
--------------------------+-----------------------------
 Reporter:  alexufo       |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Media         |    Version:  trunk
 Severity:  normal        |   Keywords:
  Focuses:                |
--------------------------+-----------------------------
 add


 {{{
 add_image_size( 'thumb100x100', 100, 100, true );
 add_filter( 'jpeg_quality', create_function( '', 'return 30;' ));
 }}}


 to function.php

 upload picture to library.

 look at upload folder.

 https://dl.dropboxusercontent.com/u/3013858/P1030174-100x100.jpg

 How can will be 30kb file size with visible jpg artifacts?
 I look like save twice. With 30% compression and with 100% quality

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Ticket URL: <https://core.trac.wordpress.org/ticket/28634>
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