1999-2009
Winston Chang
The most widely useful method for sharpening an image
The unsharp mask is a sharpening filter that works by comparing using the difference of the image and a blurred version of the image. It is commonly used on photographic images, and is provides a much more pleasing result than the standard sharpen filter.
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| Type | Name | Description |
|---|---|---|
| PF_INT | run-mode | The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) } |
| PF_IMAGE | image | (unused) |
| PF_DRAWABLE | drawable | Drawable to draw on |
| PF_FLOAT | radius | Radius of gaussian blur (in pixels > 1.0) |
| PF_FLOAT | amount | Strength of effect |
| PF_INT | threshold | Threshold (0-255) |
None