BucketMedian

Latest revision as of 22:35, 2 October 2017

[edit] Description

BucketMedian is an implementation of spatial median filter adapting bucket (counting) sort algorithm. Also induces BMBorderProc.avsi, a script to safely process borders with BucketMedian.

[edit] Requirements

• AviSynth 2.5.8, or 2.6.0 Alpha5 or greater
• Supported color formats: Y8, YV12, YV16, YV24, YV411

** AviSynth 2.5.8 only supports YV12

• Microsoft Visual C++ 2010 SP1 Redistributable Package (x86)

[edit] Syntax and Parameters

BucketMedian (clip, int "radius", int "thresh", int "min", int "max")

clip   =

Input clip; only planar formats are supported and only luma will be processed.

int  radius = 1

The radius of the neighborhood pixel referred to in order to calculate a median.

Higher values require heavy resources. Box size is (radius*2+1) * (radius*2+1).

Range: 1 to 255

int  thresh = 1

Threshold of which determines whether to change a pixel value into a median.

new = absolute(median - old) < thresh ? median : old

(new:filtered pixel value, old:source pixel value)

Range: 1 or higher

int  min = 0

Threshold of low pixel value.

If source's value is lower than this, the pixel is not processed.

Range: 0 to 254

int  max = 255

Threshold of high pixel value.

If source's value is higher than this, the pixel is not processed.

Range: 1 to 255

[edit] Examples

MedianBucket with default settings:

AviSource("blah.avi")
MedianBucket(radius=1, thresh=1, min=0, max=255)

[edit] Changelog

Version      Date            Changes

v0.3.0       08/21/2012      - Remove border processing and add BMBorderProc.avsi
v0.2.0       04/06/2012      - Add "thresh" parameter
v0.1.0       04/04/2012      - Initial release

[edit] Archived Downloads

[edit] External Links

• GitHub - Source code repository.
• Doom10 Forum - BucketMedian discussion.
• blogspot - v0.3.0 blog post [Japanese].
• blogspot - v0.2.0 blog post [Japanese].
• blogspot - v0.1.0 blog post [Japanese].

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