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ab7da32d25
The T.800 spec says there should only be one 'colr' box, but the extended jpx file format spec in T.801 annex M allows having multiple. Method 2 is a basic ICC profile, while method 3 (jpx-only) allows full ICC profiles. Support that. For the test, I opened buggie.png in Photoshop, converted it to grayscale, and saved it as a JPEG2000, with "JP2 Compatible" checked and "Include Transparency" unchecked. I also unchecked "Include Metadata", and "Lossless". I left "Fast Mode" checked and the quality at the default 50.