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A: We edit images in RGB, CMYK, and Lab. The essential difference is that we work in different color gamut spaces. The color gamut refers to the range of colors that can be expressed by a certain color model, and also refers to the range of colors that can be represented by specific media such as screen display, printer output, and print copy. The color of the visible spectrum of the natural world forms the largest gamut space, which contains all the colors that the human eye can see. In the color mode, the Lab color space is the largest, and it contains all the colors in RGB and CMYK.
What is the best mode for designing image color patterns?
A: In Photoshop, the color modes of an image are RGB mode, CMYK mode, GrayScale mode, and other color modes. The use of any mode for designing image patterns depends on the end use of the design image. If the designed image is to be printed or printed on printing paper, it is best to use the CMYK color mode so that the color seen on the screen is close to the output printing color or the printed color. If the design is for electronic media displays (such as web pages, computer projections, video recordings, etc.), the color mode of the image is best to use the RGB mode, because the RGB mode is more vivid and richer in color and the picture is better. And there are only 3 channels in the image, the data volume is smaller, and the disk space is less. If the image is gray, GrayScale mode is better, because even if the image is expressed in RGB or CMYK color mode, it still looks neutral gray color, but its disk space is much larger. In addition, if the gray image is to be printed, if it is expressed in the CMYK mode, there are four editions of the film and the printing, the cost will not be great, and it may cause color cast problems when the gray balance is not well controlled during printing. When the ink volume is too large, color shifts occur in gray images.
Clever use of color space and color mode conversion
What is gamut space? What is the significance of clarifying the gamut space?