How to use ps to dig a picture with similar patterns and colors like this?

1: Press q to enter the quick mask editing mode.

2. Select the brush tool (B), set the foreground color to black, and choose the appropriate brush size according to the situation. Smear the selected part of the image and pay attention to the details when painting (the place painted with a brush is the unselected area).

3. When finished, press Q again to exit the quick mask mode, so that the part originally painted with a brush becomes the selection. Press ctrl+shift+I (select the opposite direction) to get the selection.

So you can dig out the image.