Sharpen
The Sharpen component enhances the edges in the source image, making it look sharper. This is a map component, it can be located in the Processing category on the Components Bar. Sharpen is a bitmap-based component – in order to produce the output image, it renders a bitmap version of the source image. Using bitmap-based components in a filter can increase its rendering time, and, in some cases, degrade the quality of the final image, so Sharpen should be used only when necessary.
Provides the source image for sharpening. This is a required input – to make Sharpen work, this input must be connected.
Amount: Map Input
Sets the sharpening strength. Amount of 0 produces no effect, and the value of 100 results in maximum sharpening. Since Amount is a map input, its value can be controlled separately for different image areas by connecting a map component to this input.
Adjusts the sharpening radius. Radius is measured as a percentage of the global Size value divided by 20. For example, if Size is set to 600 pixels, and Radius is set to 10, the actual sharpen radius will be 3 pixels.
When turned on, the adjustment affects only the lightness of the source image, leaving its hue and saturation unchanged. For more information, see Preserve Color: How it Works.