The BCC Unsharp Mask filter uses a classic image sharpening technique
similar to the method used to sharpen film images. The source image is blurred,
and the blurred image is then subtracted from the source. The resulting image
is sharper and has more contrast.
Unsharp Mask sharpens areas in an image with significant color changes by
adjusting the contrast of edge details to create the illusion of image
sharpness. This filter is useful for refocusing an image that appears blurry
due to scanning, poor lighting, or other factors.
The built in PixelChooser, with integrated mocha planar tracking allows for
greater control over which areas of the image the filter should affect.
[To learn more about this filter, and see a breakdown of the various controls,
please click here](https://www.borisfx.com/helpdocs/?page_id=1351 “BCC Unsharp
Mask Help Documentation” )