Quote:
Originally Posted by poisondeathray
A quick glance and it appears those values are different than the official specs, not sure what's up with that . I think the ones in wikipedia are older, I think it was revised again later. I'd probably trust the official ITU document - that's what zimg/zlib uses and I'm pretty sure jpsdr goes by it too. Anyways, the point is they have different primaries.
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zimg uses those values from wikipedia -
https://github.com/sekrit-twc/zimg/b...ce_param.h#L28 REC_470_BG (625 lines) and SMPTE_C (525 lines/170m/240m).
Edit:
Quote:
Originally Posted by poisondeathray
I'm not sure what it does; I haven't really used it much. But if it accounts for the primaries difference (ie. primaries_input was 709, primaries_output is 601_625) - you'll usually get shifted colors in typical programs, because when they convert back to RGB for display, they usually only use the matrix the way most people have programs configured.
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It seems that behavior is only when XYZ is used for 709<->601 (or 2020)? Using LinearRGB for those conversions doesn't touch primaries?