title: Deconvolution Sharpen (GLSL)
media types:
Video
description: Deconvolution Sharpen is a filter that sharpens by way of deconvolution (i.e., trying to reverse the blur kernel, as opposed to just boosting high frequencies), more specifically by FIR Wiener filters. It is the same algorithm as used by the (now largely abandoned) Refocus plug-in for GIMP, and I suspect the same as in Photoshop's “Smart Sharpen” filter. The effect gives generally better results than unsharp masking, but can be very GPU intensive, and requires a fair bit of tweaking to get good results without ringing and/or excessive noise.
version: 1
creator: Steinar H. Gunderson
copyright: Dan Dennedy
license: GPLv2
title: Matrix Size
type: integer
readonly: no
required: no
animation: yes
minimum: 0
maximum: 25
default: 5
title: Circle Radius
type: float
readonly: no
required: no
animation: yes
minimum: 0
default: 2
title: Gaussian Radius
type: float
readonly: no
required: no
animation: yes
minimum: 0
default: 0
title: Correlation
type: float
readonly: no
required: no
animation: yes
minimum: 0
default: 0.95
title: Noise Level
type: float
readonly: no
required: no
animation: yes
minimum: 0
default: 0.01
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