2. Copy this layer to obtain a copy layer. Press the shortcut key "CtrlI" to turn the copied layer into a negative effect.
3. Select "Color Fade" from the drop-down menu of the copied layer, and the picture will be so bright that almost nothing can be seen.
4. Under the Filter menu, select Blur → Gaussian Blur. You can set the fuzzy radius value according to the thickness of the sketch line you need. After the completion, you can make corresponding adjustments and finally achieve satisfactory results.