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Update conversion matrix for NTSC-J

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These were original calculated by @EndlesslyFlowering, and they've not came up with a new version that does chromatic adaptation (D93 to D65 white point) better, hence should be more accurate.

These are already in use in RenoDX:
283b859021/src/shaders/color.hlsl (L97C1-L103C49)
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Filippo Tarpini 2025-12-21 04:13:46 +01:00 committed by GitHub
parent a32779340e
commit 0aa0071bec
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1 changed files with 3 additions and 3 deletions
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6
Data/Sys/Shaders/default_pre_post_process.glsl
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@ -11,9 +11,9 @@ mat3 from_NTSCM = transpose(mat3(
// ARIB TR-B9 (9300K+27MPCD with chromatic adaptation) (NTSC-J) -> BT.709
mat3 from_NTSCJ = transpose(mat3(
0.823613036967492, -0.0943227111084757, 0.00799341532931119,
0.0289258355537324, 1.02310733489462, 0.00243547111576797,
-0.00569501554980891, 0.0161828357559315, 1.22328453915712));
0.768497526, -0.210804164, 0.000297427177,
0.0397904068, 1.04825413, 0.00555809540,
0.00147510506, 0.0328789241, 1.36515128));
// EBU - BT.470BG/BT.601 (PAL) -> BT.709
mat3 from_PAL = transpose(mat3(