Key prospects, according to the specific situation of the prospect and background:
1. If the color contrast between the foreground and the background is large, the color range can be used to extract.
2. If one of the channels is black and white, it can be extracted by the channel method.
3. If the boundary between foreground and background is obvious, you can use the magic wand tool to deal with it.
4. If the boundary between foreground and background is not obvious, you can pinch it with a pen tool.
5. If the boundary is complex, such as hair, you can use a filter to extract it.
Wait a minute.