Generally speaking, the definition of a picture itself has been fixed. So far, there is no software that can improve the clarity of the picture. At most, the original definition is kept after amplification. If you really want to improve the clarity of the picture, you can try to use the sharpening filter in PS, but I have used it before! ~ the effect is not very obvious. There is also the first step in using PS: open the photo;

Step 2: Open Layer → New → Copy Layer and copy a new background copy;

Step 3: Make the background copy layer into black and white through Image → Adjustment → Color Removal;

Step 4: Set the mixing mode of the two layers as "superposition". At this time, we can see that the image only widens the contrast, but does not increase the clarity.

Step 5: This is the most critical step. Open the Filter → Others → Gao Fancha Reservation panel and pull the slider to a radius of 0. 1-0.2. From the gray image, we can see that the contrast edge of the image appears and the color image begins to become clear. Special reminder: Don't pull the slider too big, and control it at 0. 1. Otherwise, it will be counterproductive.

Step 6: Continue to strengthen the definition. Drag the layer 1 directly to the "New Layer" icon below to generate a new overlay effect layer. If you are not satisfied, you can continue to drag the current layer in the same way until the definition is satisfactory. But don't go too far.

However, the results of these methods are not very satisfactory. . The sharpness of a photo depends on the shooting equipment. If it can be changed to high definition, who will spend so much money on those professional photographic equipment? . .