I found an ICC profile for my scanner (CanoScan 9000F Mk II), which does indeed seem to produce truer colors than my manual adjustments. But that leaves a question, should I upload color-managed images to CAA, or convert them to sRGB?
- Color managed:
- Advantages: no loss of information. Seems to best fit the archive goal.
- CAA downscaling discards color management info. Colors are wrong.
- Seems Firefox and Chrome are ignoring it too, colors are wrong. (Not sure why; they supposedly support color management, and I fiddled with the Firefox about:config options to no effect);
- Picard also fails to apply the profile when displaying. Not sure what it does when downscaling.
- So do a few local image viewers. (But others apply it, and exiftool shows its there…)
- I’m guessing my music players won’t display it correctly, either.
- Convert to sRGB
- Advantages: it works. Everywhere.
- Disadvantages: possible loss of info if colors are outside of sRGB gamut
Example of differences: (This image is in sRGB; on the left w/o conversion, on the right with GIMP converting).
Personally, I’m leaning towards converting them to sRGB now.