Enhance
Sharpen (Unsharp Mask)
Sharpen image, by adding difference to blurred image, a technique for sharpening originally used in darkrooms.
Operation pads
This operation exposes the following data pads, defining how it receives, processes, and emits image data:
Input
Output
Operation properties
Radius
gdouble
Expressed as standard deviation, in pixels.
Default
Value range
Default
3.00Value range
0.00 • • 1500.00.Amount
gdouble
Scaling factor for unsharp-mask, the strength of effect.
Default
Value range
Default
0.50Value range
0.00 • • 300.00.Threshold
gdouble
Default
Value range
0.00Value range
0.00 • • 1.00.