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Photoshop loses pixel data for 16-bit (48-bit) TIF files when saving

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New Here ,
Oct 18, 2022 Oct 18, 2022

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I was comparing 24-bit and 48-bit depth for archival scanning, when I came across this bug.

Technical info/version:

Adobe Photoshop Version: 23.5.1 20220907.r.724 5600b96  x64
Betriebssystem: Windows 10 64-Bit
Version: 10 10.0.19044.2130
ImageMagick-7.1.0-Q16-HDRI

How to reproduce:

  1. Open 48-bit TIF in Photoshop
  2. Save TIF (compressed or uncompressed doesn't matter, as long as it is lossless)
  3. Compare pixel data with ImageMagick compare (options -compose Src -highlight-color White -lowlight-color Black to get black/white diff only)
  4. Observe vastly different pixel data for 48-bit files

Repeating the same procedure for my 24-bit scans results in black comparison frame, showing zero difference.

tif_vs_tifc_48-bit.pngtif_vs_tifc_24-bit.png

 

I can not insert the source files into this post, because the scans are bigger than 47 MB. If external links are fine, I can upload them somewhere else.

Bug Unresolved
TOPICS
Windows

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1 Comment
Adobe Employee ,
Oct 18, 2022 Oct 18, 2022

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External links work fine for sharing files.  Post a URL to the file using CC files or dropbox, or something similar to share the file.


Senior Product Manager - Customer Advocacy - Digital Imaging

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