Sharpening an Image on Photoshop
One of the first things we notice about an image is its sharpness level. Sharpness is associated with the quality of lens, the aperture used and critically, the point of focus. The more accurately you have focused on the subject, the better will be the overall sharpness in the image. Ideally sharpness is something that needs to be taken care of at the shooting stage and not the post production stage. If certain information is missing in the raw file from the camera, nothing on computer can mimic it. However, we definitely can increase the apparent sharpness of images that are not of very low quality in the first place. Do not use the techniques mentioned in this article as a rescue tool when you have made a boo boo in the shooting stage. Rather, use it as a touch up before final presentation of your images. Again, there is nothing that can replace a quality lens, the right aperture or the critical point of focus. Alright, lets get down to the photoshop bit -

Check out the two image above. The second one appears much sharper than the first, if you look closely. Let us learn how to do this. As usual, open up the image in Photoshop using FILE-OPEN. Once the image is opened, go to the filters menu and choose SHARPEN, and further choose UNSHARP MASK in the sub menu. Here you will be presented with three options.
Well, once you have the Unsharp mask options in front of you, you can begin sharpening the image. The first option, AMOUNT obviously controls the amount of sharpening that is applied to the picture. Instead of beginning with this, we suggest you start with the second control option of RADIUS. This effects the radius of pixels that are effected with the sharpening procedure. The levels of sharpening that you apply – the levels of the 3 tools you see in front of you, will vary depending on the resolution of the image, as with most Photoshop tools. The larger the dimensions of the image, for example, the larger will be the required pixel radius for sharpening. When you alter the variables in the sliding bars, you resulting effects will simultaneously be visible in the opened image. Experiment with radius and amount until you reach the desired effect. Beware-do not sharpen the image to such an extent that it is obvious to the naked eye – you begin to see high contrasts when you over-sharpen, and this is to be avoided at all times. The 3rd and final tool on the Unsharp mask palette is the THRESHOLD tool. Use this to soften the sharpening effect if it is overly obvious after you’ve adjusted the first 2 sliding bars. We usually leave this alone and work with just the first 2 options of amount and radius.
You could use the SHARPEN EDGES tool under the SHARPEN menu to sharpen only the outlines of the subject. However, the technique mentioned above will give you much more acceptable and natural results.



















