How to make sharp corners?

Question

Adobe Photoshop

Hello! How to make sharp corners like on the screen?

Answer 1

Photoshop:
1. Select a piece of the picture. For example, part of a rectangle.
2. Quick mask → Filter → Distort → Wave:
3. Exit the quick mask mode.
4. From the resulting selection, make a layer mask.
5. Profit.

Answer 2

see the #main-yellow-box:after class here . Only, accordingly, you will have a picture of only one clove