How to turn a photo of a circular object into a plan, such as a picture, and how to operate it with PS?

There are many ways. Let's talk about a method that beginners can probably use.

PS After opening the file, make a large enough circular selection in the middle of the file, fill it with color, and then give this layer 50 transparency and keep this layer at the top.

Select the original image layer Ctrl+J to copy the whole image layer, press Ctrl+T, and then press Ctrl to adjust the four corners.

Adjust the round cake you want to coincide with the round color block with transparency of 50 (the cake can have a circle thinner than the color block), and press Enter.

Change the transparency of the round color block layer back to 100%.

Continue to select the distorted photo layer, hold down Ctrl and click the thumbnail of the layer with the round color block in the layer board.

At this time, you will see the circular selection, and then press Ctrl+J, and the cake you want will come out independently.

It looks complicated, but the operation is actually very simple. Everyone uses the basic tools.