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.