1. Open the PS software first, and then open the picture to be trimmed in PS. The following is an example, as shown in the figure below.

2. Then copy a layer of pictures, and the following operations are all carried out on the copied layer, as shown in the figure below.

3. Then use the pen tool to select the area to whiten. Take the face as an example, feather two pixels, as shown in the figure below.

4. Then click "New Layer" on the lower right and press Alt+delete to fill in white, as shown in the figure below.

5. Next, choose "Soft Light" as the blending mode, and set the opacity to an appropriate parameter, and it is finished. Here is the finished product, as shown in the figure below.