What is color scale?

Color scale is an index standard to express the brightness of an image, which is what we call color index. In the process of digital image processing.

Refers to the gray resolution (also known as gray resolution or amplitude resolution). The color fullness and fineness of an image are determined by the color scale. Color scale refers to brightness, which has nothing to do with color, but the brightest is only white and the least is only black.

brief introduction

This is what we call the color index. The color fullness and fineness of an image are determined by the color scale. For example, the display industry standards are 256 colors, 4096 colors and 65536 colors.

In image processing, the essence of adjusting the color scale is to adjust the size of different pixel values by adjusting the histogram to improve the visual effect of the image. Taking the two RGB values in the first paragraph as an example, the difference in the original image is very small, and the difference between (12, 12) and (13, 13) can be amplified by programs or software.