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Better ICC profile handling in image processing #673

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Better ICC profile handling in image processing #673

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@mdashlw mdashlw commented Feb 11, 2026 •
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Closes #666 and closes #665

  • Updates imagemagick inside mediaproc to v7 Q16 HDRI - necessary for accurate color space conversion
  • PNG: always runs non-animated files through magick reorientation, profile conversion, and metadata stripping
  • JPEG: checks the embedded profile against our reference first to avoid reencoding

Optimal reference image with RGB data made:

magick -size 1x1 xc:"rgb(16,16,16)" xc:"rgb(128,128,128)" xc:"rgb(128,0,0)" xc:"rgb(0,128,0)" xc:"rgb(0,0,128)" xc:"rgb(64,128,192)" +append -depth 8 -type TrueColor -strip priv/icc/reference.png

magick priv/icc/reference.png -depth 8 RGB:- > priv/icc/reference.rgb

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@liamwhite liamwhite liamwhite approved these changes

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Smarter ICC profile handling EXIF and ICC profiles not stripped from PNGs

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@mdashlw @liamwhite