Photoshop USM Sharpening principle parameter and correct USM Sharpening Method Example Tutorial

This paper explains the correct use of USM sharpening in Photoshop and the principle and parameters of USM sharpening.

　　First, Photoshop USM sharpening the use of correction

For the professional staff, sharpening the work of most of the RGB mode is done directly, in fact, this is not scientific, the correct USM sharpening image should be in RGB mode combined with the Ming mode to complete, the aim is to sharpen the image without damaging color information.

　　Second, the case to explain the parameters of USM Sharpening principle

The following figure is the contrast effect of Photoshop USM before and after sharpening:

1. Open the material file that needs USM sharpening.

2. Press Ctrl+j to copy the background layer and get layer 1.

3. Perform the "filter-sharpen--USM" command with parameters set as follows:

USM Sharpening Principle: USM Sharpening The edge of the image on both sides of the open-wire or dark lines, adjust the edge of the details of the contrast, so that the image edge contour to achieve clarity.

USM Sharpening Parameter Description: "Quantity" is used to adjust the degree of sharpening, the greater the value of sharpening the more obvious effect. The radius is used to control the range of sharpness around the contour of the image. The threshold controls how Photoshop determines the edges. If the threshold is set to 0, any location is considered a potential edge, so each pixel is sharpened.

4. Set the blending mode of layer 1 to the Ming mode. The aim is to sharpen the image while the image color information does not cause damage. After sharpening the image of the branches and leaves, hair clearly clear.

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