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Feature Request: Photoshop Tags #42

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mschnell1 opened this issue Oct 27, 2024 · 1 comment
Open

Feature Request: Photoshop Tags #42

mschnell1 opened this issue Oct 27, 2024 · 1 comment
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enhancement New feature or request postponed Not now; Work on this some time in the (distant) future...

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@mschnell1
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mschnell1 commented Oct 27, 2024

I in fact do not need this, but as pre 0.6.0-Beta.5 versions could not handle some files of mine, it might be documented as a possible enhancement.
Visible issue: as well ThumbsPlus as Explorer show something created by Photoshop as Comments or Title even if Little Exif (or whoever) sets the ImageDescription Exif Tag.
Right now Little-Exif provides the option to completely remove the Photoshop Section (which is perfectly enough for my project).
In a perfect world the (or some of the ) Photoshop tags might be read and written by Little_Exif.

@mschnell1 mschnell1 changed the title Photoiho Tags Photoshop Tags Oct 27, 2024
@mschnell1 mschnell1 changed the title Photoshop Tags Feature Request: Photoshop Tags Oct 27, 2024
@TechnikTobi
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TechnikTobi commented Oct 28, 2024

Notes for future-Tobi:

  • See issue Unexpected exclamation marks #34
  • The APP13 segment contains data that is related to the PSD file format
  • There may be multiple APP13 segments in a single JPEG that need to be stitched together before they can be processed as a whole.
  • This Photoshop data has its own structure that is not related to TIFF-based stuff like EXIF and e.g. utilizes Pascal Strings (that seemingly have 6 bytes as length prefix? Need source to further validate this) and Image Resource IDs, hex values that tell us what the specific data is.
  • One such ID, 0x0404, is for IPTC-NAA records, which in turn may contain data that overrides the EXIF ImageDescription tag (again, see issue Unexpected exclamation marks #34).
  • Further analysis is required if/how APP12 plays a role here.

@TechnikTobi TechnikTobi added enhancement New feature or request postponed Not now; Work on this some time in the (distant) future... labels Oct 28, 2024
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enhancement New feature or request postponed Not now; Work on this some time in the (distant) future...
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