Unsharp Mask darkens and lightens along edges to create sharper focus. Its parameters are amount, radius, and threshold.

Unsharp Mask works on 8 Bit, 16 Bit, 32 Bit, RGB, grayscale, CMYK, and Multichannel images, and Smart Objects. This filter launches another window with options.

Unsharp Mask is part of Adobe Photoshop’s Extended Filters.

Photoshop terms, Sharpen, Sharpen Edges, Sharpen More, Smart Sharpen

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