Color calibration principle of the hottest Photosh

2022-10-23
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The color correction principle of Photoshop's optional color tool (Part 2)

the adjustment steps are as follows:

Step 1 reduce the Yellow component in skin color. The curve tool or the optional color tool can be used to reduce the Yellow component, and the latter is used here. Open the optional color tool, take red as the adjustment object, and reduce the amount of yellow. In order to increase the adjustment range, the absolute adjustment method is adopted. The adjusted parameters and results are shown in Figure 4. It can be seen that the content of yellow components in the skin color has been reduced according to his view, from the original 35% to 25%, and the whole skin color is close to the law of white skin color

step 2 improve the whiteness of skin color. The skin color in Figure 4 is better, but not white enough. If we use the curve tool or the brightness/contrast tool to improve the brightness of the image, the brightness of the whole image will be improved, and our goal is to only improve the brightness of the skin color of the character, without affecting the background of the image. Use tools carefully here. Here, some models only improve the brightness of the skin color of people whose detection limit is more outstanding. The skin color is mainly red. Therefore, you can use optional color tools, take red as the adjustment object, and reduce the basic colors m and y of the image. See Figure 5 for the adjustment parameters and results. As the basic color of red decreases, the percentage of red dots also decreases, so the brightness of red increases, highlighting the whiteness of the character's skin color. It can be seen that the adjusted skin color is obviously whiter, tender and pleasant than that in Figure 4

step 3 continue. These two regions account for about 85% of the total output of flame retardant PP in China, reducing the yellow in the skin color. The image is still slightly yellowish, so continue to reduce the yellow in the image, so that the skin color of the figure appears more white and tender. Still use the optional color tool, take red as the adjustment object, and reduce the content of yellow. The adjustment parameters and results are shown in Figure 6

make a comparison between figure 3 and Figure 6. It is obvious to adjust the yellow skin color of a Caucasian in Figure 3, which is popular with new and old users, to a white skin color that conforms to his identity, so it looks more natural

source: Printing World

Author: jianchuanxia, Wang Junkai, 2003 graduate class of printing and packaging Department of Wuhan University

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