#162 ✓fixed
Virgil Dupras

Rotated pictures are mistakenly matched during the exif timestamp scan

Reported by Virgil Dupras | June 9th, 2011 @ 10:58 PM

from email:

concerning EXIF-timestamps, dupeGuru 2.2.0 treats a "landscape" image and a "portrait" image as "the same". it would be helpful if this feature could be turned on/off (I have some photos stored in both version that should not be detected as "duplicates"

Comments and changes to this ticket

  • Virgil Dupras

    Virgil Dupras June 14th, 2011 @ 04:17 PM

    Well, when we think about this, rotated pictures are supposed to match, even though the scan type is "EXIF Timestamp". So the problem is not so much that the pictures are mistakenly matched, but that there should be an option for people who want to ignore EXIF rotation flags.

  • Virgil Dupras

    Virgil Dupras June 14th, 2011 @ 08:02 PM

    • State changed from “new” to “accepted”
    • Assigned user set to “Virgil Dupras”
  • Virgil Dupras

    Virgil Dupras June 15th, 2011 @ 03:47 PM

    I'm taking this from the wrong angle. The photos sent by the user who reported the problem were rotated, but didn't have an EXIF orientation flag, so an option to ignore that flag isn't going to fix this.

    In fact, I can't think of a situation where we wouldn't want to apply that flag. The only thing it means is that the camera was rotated when the photo was taken and that the picture is meant to be rotated.

    So, finally, what we want here is to apply the "Match scaled pictures" option to "EXIF Timestamp" scan type, and if the option isn't selected, ignore all matches that don't have the same dimensions. I'd also add a warning in the help file to say that modified pictures often keep the same timestamp, so this method of scanning can result in false positives.

  • Virgil Dupras

    Virgil Dupras June 15th, 2011 @ 04:13 PM

    • State changed from “accepted” to “fixed”

    (from [3cbee91b64c9]) [#162 state:fixed] Apply the 'Match scaled pictures' option to exif timestamp scan type. https://bitbucket.org/hsoft/dupeguru/changeset/3cbee91b64c9/

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