Enblend incorrectly warns of mismatched ICC profiles

[Evan Derickson]

Reproduce:

1. Export RAW images as tif from Darktable, with either the 'linear Rec709 RGB' or 'Adobe RGB' settings. (These are the only color spaces I have tried so far)
2. Import into Hugin, create panorama, use enblend as the blending operator
3. Terminal reports non-blocking messages such as below:

enblend: warning: input image "tiger3d0003.tif"
enblend: warning: has ICC profile "Darktable linear Rec709 RGB",
enblend: warning: but first image has ICC profile "Darktable linear Rec709 RGB";
enblend: warning: blending images with different color spaces
enblend: warning: may have unexpected results

Not a critical bug, but enblend shouldn't be warning about differing color spaces when they are obviously identical.

[Christoph Spiel (cspiel)]

This might be surprising.

FYI, Enblend and Enfuse don't simply compare
the profiles' ASCII names, but judge profile equality by
comparison of the whole profile as returned by
    vigra::ImageImportInfo::getICCProfile()
We don't dig deeper into any difference than just throwing the
warning you see.

[Christoph Spiel (cspiel)]

In a test with a six image project, where the input images were
generated by the current tip of Darktable and given a ProPhoto
ICC profile no warnings show up with Enblend (also current tip of
Dev Branch).

[Christoph Spiel (cspiel)]

Fixed in rev 3e1c4bc71018.

[Christoph Spiel (cspiel)]

Fixed in 4.1.4 and 4.2.