Sharpen Images in Photoshop

STEP 1: Open a image in Photoshop
STEP 2: Create a Duplicate Layer (CTRL+J)
STEP 3: Click Filter menu, select Other and then select High Pass. This will create a gray overlay of your image.
STEP 4: Increase the radius (Example : 5.1) until you can just see the outline of your image—not too much, or the result will look unnatural.

STEP 5: Select Linear Light on your duplicate layer to sharpen the original image. If you’ve overdone it a bit, you can adjust the opacity to find the correct balance.

STEP 6: Lastly, if you want to sharpen only part of the image, you can add a layer mask and use the black paintbrush to return certain areas to normal.

Video Tutorial:-