How does ps change the background color of photos?

PS can be changed by matting. The following is the relevant content to share and organize for everyone. Interested friends don't miss it. Come and have a look!

1. First, open PS software to import a photo that needs to be replaced with a background photo.

2. Then select the image on the menu bar-adjust the replacement color inside.

3. Click the color of the original layer on the straw, and select the color (blue) to be replaced in the pop-up options. After replacement, I found that my hair was still the original layer (red). You can drag the small slider of the tolerance value to the bottom first, which can reduce the red color.

4. However, the red color has not been completely removed, so you can choose to change the straw to the "+"in the middle of the color. Click Add Blue.

5, so that the hair is not red, but the whole person becomes blue again.

6. You can select the historical brush record in the toolbar on the left and adjust the appropriate brush size.

7. Carefully smear it on the characters, and finally you can get the effect picture of changing the background color.