色域Gamut

调色 · Color

色域是一台设备(或一个标准)能表达的颜色范围——在 CIE 1931 马蹄色度图上就是一块三角形区域。

  • Rec.709:网络视频的通行色域,日常交付的默认目标。
  • DCI-P3:数字影院的色域,比 709 宽一圈。
  • Rec.2020:HDR 时代的宽色域标准,罩住前两者。
  • 五维图的一角:色域决定颜色那格能铺多宽;色彩容量还要乘上亮度范围(见 色彩容量)。

A gamut is the range of colors a device (or a standard) can express — on the CIE 1931 chromaticity diagram it is a triangle.

  • Rec.709: the default color space of online video — the usual delivery target.
  • DCI-P3: digital cinema's gamut, a ring wider than 709.
  • Rec.2020: the wide-gamut standard of the HDR era; contains both.
  • One vertex of the five-axis chart: gamut sets how wide the color leg spreads; color volume multiplies it by luminance range (see Color Volume).