Digital Imaging · 2021-12-28

【一点点色彩科学】白平衡校准-色度适应转换算法对比Chromatic Adaption

原始素材

mov格式 Apple Prores 422

Rec2020 Nikon N-Log

处理方式

SMPTE2065-1

IDT = Nikon-Nlog

RRT + ODT (sRGB 100nit)

光源匹配参数

原始白点:CCT >100000 K CIExy = [0.2016, 0.2054]

目标白点:标准光源D65 (约6500K)

赠送常见光源的信息表

IlluminantXYZ
A1.098501.000000.35585
B0.990721.000000.85223
C0.980741.000001.18232
D500.964221.000000.82521
D550.956821.000000.92149
D650.950471.000001.08883
D750.949721.000001.22638
E1.000001.000001.00000
F20.991861.000000.67393
F70.950411.000001.08747
F111.009621.000000.64350
Method[MA][MA]-1
XYZ Scaling1.0000000 0.0000000 0.0000000
0.0000000 1.0000000 0.0000000
0.0000000 0.0000000 1.0000000
1.0000000 0.0000000 0.0000000
0.0000000 1.0000000 0.0000000
0.0000000 0.0000000 1.0000000
Bradford0.8951000 0.2664000 -0.1614000
-0.7502000 1.7135000 0.0367000
0.0389000 -0.0685000 1.0296000
0.9869929 -0.1470543 0.1599627
0.4323053 0.5183603 0.0492912
-0.0085287 0.0400428 0.9684867
Von Kries0.4002400 0.7076000 -0.0808100
-0.2263000 1.1653200 0.0457000
0.0000000 0.0000000 0.9182200
1.8599364 -1.1293816 0.2198974
0.3611914 0.6388125 -0.0000064
0.0000000 0.0000000 1.0890636