The specific steps are as follows:

The first step: to prepare the photo with PhotoShop open;

The second step: the menu bar to find the "Image - Adjustments - Color" (Ctrl + Shift + U) to turn the photo into black and white;

The third step: press "Ctrl + J", copy the layer, and then press "Ctrl + J" to copy the layer. U), turn the photo into black and white;

Step 3: Press "Ctrl + J", copy the layer, layer a new column "Layer 1";

Step 4: Menu bar to find "Image -Adjustment - Invert" (Ctrl + I). Set layer 1 to invert;?

Step 5: Layer 1 of the overlay drop-down menu to "Color Lighten", then the picture will become almost blank;

Step 6: the upper menu bar to find "Filter - Other - Minimize". Minimize". Set the radius to 1 pixel (adjust as needed, the value there is just a reference).

The last step: If you are not satisfied with the effect, you can double-click on Layer 1 to bring up the Layer Styles dialog box, split (hold down the Al key) the black slider of the next layer, blend the darkest pixels of the background layer into the final image, and also modify the facial colors with the Deepen and Lighten tools to make the effect look more natural.

Or choose to adjust the parameters directly in the sketch under the Filter menu. The result is a bit rough.