How to change the background in PS without cutting out the image?

The steps to change the background color of the ID photo without cutting out the image are as follows

First, open PS, open the ID photo whose background color you want to change, and ctrl j to copy one layer.

Click Select-Color Range to bring up the panel. Select the eyedropper tool with the plus sign and keep clicking on the blue color of the background. The tolerance parameter can be adjusted to control how well the straw recognizes color. The smaller the parameter, the higher the recognition, and vice versa.

#Click OK to get the background selection, but if you look closely, some edges of the characters are not selected.

Click Select-Modify-Expand and expand it by about 5 pixels.

Image-Adjustment-Replace Color, the resulting color is red. If the edge area is blue, you can increase the tolerance. All blue is replaced with red until the edges of the character.

Rendering

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