What does PS color scale mean?

What does ps color scale mean?

ps The color scale is an index standard that expresses the brightness of the image, which is what we call the color index. In digital image processing tutorials, it refers to the grayscale resolution (also known as grayscale). degree resolution or amplitude resolution). The color richness and fineness of an image are determined by color levels. The color scale means that brightness has nothing to do with color, but the brightest is only white, and the least bright is only black.

In photoshop, you can use color levels in the adjustment panel, or use the shortcut key "ctrl L" to call up the color levels dialog box.

Color levels express the relationship between light and dark in a picture. For example: an 8-bit color RGB space digital image uses 2^8 (i.e. 256) levels to represent red, green and blue respectively. The value range of each color is [0, 255]. Theoretically, there are 256×256× 256 colors. Of course, the display device may not be able to fully express the differences in all colors, and the naked eye cannot distinguish similar levels. For example, an LCD monitor with poor contrast may display the colors of RGB (12, 12, 12) and (13, 13, 13) the same, and even if there is a difference in display, they both look black to the naked eye.

The color scale diagram is just a histogram. The abscissa is used to mark the quality characteristic value, and the ordinate is used to mark the frequency or frequency value. The frequency or frequency value of each group is expressed by the height of the histogram. In digital imaging, a color scale diagram is a chart that illustrates the distribution of tones among pixels in a photograph. Just like we can graph the heights of students in a class, we can graph the "brightness" of pixels in an image. A computer can count the number of all pixels in an image that have a specific brightness and then graph this number.

You can use the Levels adjustment to correct the tonal range and color balance of an image by adjusting the intensity levels of its shadows, midtones, and highlights. The Levels histogram serves as a visual reference for adjusting the basic tones of an image. For more information about how to read histograms, see About Histograms. You can save Levels settings as presets and then apply them to other images. See Saving Adjustment Settings and Applying Adjustment Settings Again.

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