Xsharpen It operates by running a small window over the frame and each center pixel is either passed through untouched
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Xsharpen Tags

filter Sharpen VirtualDub VirtualDub Filter sharpen effect sharpen frame Frame Pixel pixel frame passed center window Time passed

Xsharpen Description

The Xsharpen VirtualDub filter performs a subtle but useful sharpening effect. It operates by running a small window over the frame and each center pixel is either passed through untouched (depending upon a threshold setting), or mapped to either the brightest or dimmest pixel in the window, depending upon which is nearest to the center pixel. If the center pixel is mapped, it is also alpha-blended with the original pixel value using a configurable strength setting. The result is a sharpening effect that not only avoids amplifying noise, but also tends to reduce it. A welcome side effect is that files processed with this filter tend to compress to smaller files.

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