What is the concept of "sharpness" in photography?

Sharpness is used to adjust image sharpness. When the image clarity is slightly insufficient, it can be sharpened to make the image clearer. Softness is the antonym of sharpness, which can make the transition of each turning surface of the image round and soft. Softening is used to improve some facial defects of characters, such as wrinkles, spots and scars. Semi-softness refers to adding a little softness to the photo, and total softness refers to adding a lot of softness to the photo.