This is one of my favorite technique of all time in photoshop, and this is high pass sharpening technique. There are many ways to sharpen an image in photoshop but this is easiest way i’ve ever found. The reason the High Pass filter technique works so well at sharpening images is because any areas in the image which are not an edge are left untouched. The only areas that have sharpening applied to them are the edges, which is exactly what you want, and also what all of those confusing options in the “Unsharp Mask” and “Smart Sharpen” filters are trying to help you achieve.
Let’s get started.
Step 4: select the high pass radius pixel
After applying high pass filter anything isn’t edge becomes 50% gray and anything that is an edge becomes darker on the darker half and lighter on the light half so basically it is doing edge enhancement. Generally your radius may be somewhere between 1-3 sometimes it may be higher and sometimes may be lower it depend upon the resolution and detail of the image. Basically i like to start from the radius of 1.5.
Step 5: Select the Blend Mode Overlay
If you have a smart filter the filter itself have a blending option you can see little slider on the right side of high pass and if you click there you double click over there then you can get the same blend mode list. Now change your blend mode to overlay. It will remove all the grey pixels and sharpens your image. If you want to reduce or enhance sharpness then click on high pass layer and change the radius. Isn’t it the easiest way to sharpen your image?