noun
color reduction; reduced colors
Technical term in computer graphics and image processing for reducing the number of colors in an image or display.
この画像は減色処理によってファイルサイズが小さくなった。
This image's file size was reduced by color reduction processing.
減色すると画質が劣化することがある。
Color reduction can sometimes degrade image quality.
Compound of 減 (reduce) and 色 (color), likely coined as a technical term in computing or imaging.