[wp-trac] [WordPress Trac] #33642: Improve default Imagick compression settings

[WordPress Trac]

#33642: Improve default Imagick compression settings
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 Reporter:  joemcgill    |       Owner:  joemcgill
     Type:  enhancement  |      Status:  assigned
 Priority:  normal       |   Milestone:  4.5
Component:  Media        |     Version:
 Severity:  normal       |  Resolution:
 Keywords:  has-patch    |     Focuses:
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Comment (by joemcgill):

 Replying to [comment:35 menkom]:
 > @joemcgill What sort of meta data specifically gets stripped are you
 talking exif ? or something else

 The current `strip_meta()` method will remove all image profiles except
 for ICC and ICM data from resized images, so EXIF or other vendor profiles
 would be removed. However, any EXIF or other data set as an image property
 would remain (which seems common in my tests). The specific list of image
 properties that we explicitly remove in this step include:

 * comment
 * Thumb::URI
 * Thumb::MTime
 * Thumb::Size
 * Thumb::Mimetype
 * software
 * Thumb::Image::Width
 * Thumb::Image::Height
 * Thumb::Document::Pages

 The current patches propose that we include a filter to override this
 behavior, with the assumption that most users would benefit from the
 reduced file size and sites that require keeping all image metadata on
 resized images could override this setting fairly easily.

 The original, full-size images that are uploaded are not affected by this
 process.

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Ticket URL: <https://core.trac.wordpress.org/ticket/33642#comment:38>
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