# VariableBlur/BinomialBlur

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##  Description

BinomialBlur works by repeating a 5x5 or 3x3 kernel based on pascals triangle multiple times to blur the image. With a variance above 1 the result is very close to a true Gaussian blur and much faster (for variance below ~30).

##  Syntax and Parameters

BinomialBlur (clip, float "varY", float "varC", int "Y", int "U", int "V", bool "useMMX")

clip   =
Input clip.

float  varY = 1.5
float  varC = 1.5
Variance to use; varY for luma, varC for chroma (U/V).
Remember variance=sd^2. The variance is rounded down to the nearest half integer(0.5,1.0,1.5 etc). Radius 1 in version <=0.2 is equal to variance 0.5. Default 1.5

int  Y = 3
int  U = 2
int  V = 2
Controls which planes the filter is applied to:
• 3 : corresponding plane will be filtered
• 2 : corresponding plane will be copied from the source
• 1 : corresponding plane will be ignored
• from 0 to -255 : corresponding plane will be assigned the absolute value.

bool  useMMX = true
If true MMX instructions will be used. Default true for variance>1 else false.

##  Examples

BinomialBlur with default values:

```AviSource("Blah.avi")
BinomialBlur(varY=1.5, varC=1.5, Y=3, U=2, V=2, useMMX=true)
```

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