by G.H. Cloutier
You’re not alone; many folks don’t understand image sharpening. Sharpening an image properly requires skill and careful observation. Even when done well, there can be drawbacks to the standard sharpening techniques. By the same token, you may not need to sharpen an entire image. Sometimes only certain details need enhancement.
When the average viewer looks at an image, he unconsciously notices its sharpness (or lack thereof) by viewing a few key areas in the image, such as a person’s eyes or the edges of an object. If the eyes appear to be in focus, then the rest of the face becomes acceptably sharp. There are other ways to enhance details in an image without using sharpening. One simple drawing technique is to add fine lines to enhance edge contrast. For example, compare the images shown inFigure A. You can see that the After image has more detail and the colors seem slightly enhanced. Now here’s our confession: we applied neither sharpening nor color adjustment to the image.
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In this article, we’ll replicate the steps we took to enhance the sharpness and detail in the original image shown[…]