Original picture
final effect
1. Open the material picture, click on the channel surface, make a copy of the blue channel, and execute the blue copy: Filter > Others > High Contrast Preservation, and set the parameters as shown below.
2. For the blue copy channel, execute: Filter > Sketch > Photocopy. The parameter settings are as shown below. After confirmation, press Ctrl + I to invert, and then press Ctrl + L to adjust the color level. The parameter settings are as shown below.
3. Press Ctrl and click on the blue copy channel thumbnail on the layer to bring up the white selection. Return to the layer panel and create a curve adjustment layer. Set the parameters as shown below. After confirming, use a black brush to erase the areas that do not need to be adjusted, such as the eyes. , mouth, hair, etc.
