Sharpen (Unsharp Mask)

Sharpen image, by adding difference to blurred image, a technique for sharpening originally used in darkrooms.
Radius
Expressed as standard deviation, in pixels
name: std-dev type: double default: 3.00 minimum: 0.00 maximum: 300.00 ui-minimum: 0.00 ui-maximum: 40.00 ui-gamma: 3.00 ui-step-small: 0.01 ui-step-big: 1.00 ui-digits: 3 unit:pixel-distance
Amount
Scaling factor for unsharp-mask, the strength of effect
name: scale type: double default: 0.50 minimum: 0.00 maximum: 300.00 ui-minimum: 0.00 ui-maximum: 10.00 ui-gamma: 3.00 ui-step-small: 0.01 ui-step-big: 1.00 ui-digits: 3
Threshold
name: threshold type: double default: 0.00 minimum: 0.00 maximum: 1.00 ui-minimum: 0.00 ui-maximum: 1.00 ui-gamma: 1.00 ui-step-small: 0.00 ui-step-big: 0.10 ui-digits: 3
name: gegl:unsharp-mask
pads: input output
parent-class: GeglOperationMeta
categories: enhance sharpen
source: operations/common/unsharp-mask.c
GEGL This page is part of the online GEGL Documentation, GEGL is a data flow based image processing library/framework, made to fuel GIMPs high-bit depth non-destructive editing future.