PS Sharpening Tips

The 2 methods of Mingdouri and brightness sharpening are simple to operate, it is a method that many professional photographers like and use frequently, and extreme boundary sharpening can gain more control over the image sharpening boundary, but the operation steps should be more complicated; Beauty photo sharpening has a certain pertinence, selective sharpening method is also suitable for sharpening, Sharpening the brightness and extreme boundary sharpening all the methods, it is in the original sharpening the foundation of the increase operation.

In order to enhance the intuitive understanding of everyone, on the official website of canon, download a 5D sample, take its local demonstration operation demo.

(i) Basic sharpening technology--USM sharpening:

Before we open the book, let's have a quick review of USM sharpening. USM Sharpening is the most used sharpening tool in the Photoshop sharpening filter, which provides the maximum control space for sharpening processes. There are three sliders in the USM Sharpening dialog box: quantity, RADIUS, and valve value. Quantity: Determines the amount of sharpening applied to the image. Radius: Determines the number of pixels that the sharpening process will affect beyond the bounds. Threshold: Determines the difference between a pixel and its surrounding area before being treated as a boundary pixel and being sharpened by a filter.

The larger the number and radius, the sharper the sharpness, and the lower the threshold. From the definitions of these three parameters, it is also easy to see why the USM Filter does not have a Pauta parameter setting. In general, when sharpening a soft body, such as characters, animals, flowers and so on, "number" to choose a bit larger, "radius" selected smaller; when the need for maximum sharpening, such as buildings, coins, automobiles, machinery and equipment, "number" to choose a smaller, "radius" to choose a bit larger. The "radius" value in extreme cases should not be greater than 5. As you can see from the comparison diagram below, USM sharpening enables pixels at both ends of the critical pixel to produce changes to the original pixel or bright or dark, and is an operating process that strengthens and pulls large critical pixel contrasts, and the blurring line becomes a clear line, making it seem clear to us. The operation of USM sharpening also causes the image to appear the obvious color pixel patches, which introduce noise and noise to the image.

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