NonlinUSM

Abstract
Author	Didée
Version	2012/02/01
Download	NonlinUSM script
Category	Sharpeners
License
Discussion	Doom9 Thread

Description

Non-linear Unsharp Masking, uses a wide-range Gaussian instead of a small-range kernel. Like most sharpeners, this script only processes luma, chroma channels are simply copied from the input clip.

Requirements

• AviSynth 2.5.8 or greater
• Progressive input only
• Supported color formats: YV12

Required Plugins

• MaskTools2

Additional planar colorspaces are supported when using AviSynth 2.6 and appropriate MaskTools2.

Syntax and Parameters

NonlinUSM (clip o, float "z", float "pow", float "str", float "rad", float "ldmp")

clip  o =

Input clip

float  z = 6.0

zero point

float  pow = 1.6

power

float  str = 1.0

strength

float  rad = 9.0

radius for "gauss"

float  ldmp = 0.001

damping for very small differences

Examples

NonlinUSM with default settings:

AviSource("Blah.avi")
NonlinUSM(z=6.0, pow=1.6, str=1.0, rad=9.0, ldmp=0.001)

More Examples:

NonlinUSM(pow=4)                          ## enhance: for low bitrate sources
NonlinUSM(z=3, pow=4.0, str=1, rad=6)     ## enhance less
NonlinUSM(z=3, str=0.5, rad=9, pow=1)     ## enhance less

NonlinUSM(z=6, str=1.5, rad=0.6).Sharpen(0.3)  ## sharpen: for hi-q sources
NonlinUSM(z=3, str=2.5, rad=0.6)          ## sharpen: less noise
NonlinUSM(z=6, pow=1.0, str=1, rad=6)     ## unsharp 
 
NonlinUSM(pow=1.0, rad=2, str=0.7)        ## "smoothen" for noisy sources
NonlinUSM(pow=1.0, rad=18, str=0.5)       ## smear: soft glow

NonlinUSM(z=6, pow=4.0, str=1, rad=36)    ## local contrast 
NonlinUSM(z=6, pow=1.0, str=1, rad=36)    ## local contrast 
NonlinUSM(z=16, pow=4.0, str=18, rad=6)   ## B+W psychedelic 
NonlinUSM(z=16, pow=2.0, str=2, rad=36)   ## solarized
NonlinUSM(z=16, pow=4.0, str=3, rad=6)    ## sepia/artistic 

Changelog

Version         Date            Changes

2012/02/01      2012/02/01      - Initial public release

External Links

• Doom9 Forum - NonlinUSM discussion.
• Doom9 Forum - Usage examples.

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