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Unsharp mask and Gaussian blur

MPV shaders, a 2 pass unsharp mask and a 2 pass gaussian blur. Similar to those in Photoshop, Image Magick, Gimp, etc.

Usage

• If you place this shader in the same folder as your mpv.conf, you can use it with glsl-shaders-append="~~/unsharpMask.glsl" or glsl-shaders-append="~~/gaussianBlur.glsl". \
• Requires vo=gpu-next.

Settings

Note unsharp mask works like this, sharpened = original + (original − blurred) * amount.

Hook

By default it hooks to MAIN. By changing all 3 //!HOOK MAIN lines you can hook both shaders to different textures (stages). For all hookable options, see mpv's user manual.

Blur spread or amount (SIGMA)

Gaussian blur sigma value, controls the blur intensity and how much it will be spread accros the blur kernel.

Blur kernel radius (RADIUS)

Determines how many neighboring pixels will contribute to the blurred value of the center pixel inside the blur kernel.

Sharpening amount (AMOUNT) (Unsharp mask only)

Sharpening amount or strenght.

Threshold (THRESHOLD)

Sets the minimum contrast for sharpening.