Aras Pranckevicius 4275d85158 Fix #133214: image vectorscope has incorrect horizontal scale ... Both Image and Sequencer vectorscopes used YUV U,V coordinates as-is, but their possible ranges are different: +-0.436 and +-0.615 respectively. It looks like more other software (ffmpeg, shotcut, etc.) re-scales the vectorscope UV to fill up a square, i.e. streches out the horizontal values, so do the same. This fixes the "skin tone indicator" line, which at 123 degrees (90 + 33 degrees to match positive I axis of YIQ color space) was placed assuming the UV values fill up a square. So it was at the wrong angle before. The vectorscope horizontal scaling and skin tone indicator line now matches other open source (ffmpeg, shotcut) and commercial (davinci resolve, final cut pro) software packages. Images in the PR. Pull Request: https://projects.blender.org/blender/blender/pulls/133316		2025-01-21 13:55:15 +01:00
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blender	Fix #133214: image vectorscope has incorrect horizontal scale	2025-01-21 13:55:15 +01:00
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