Author V. C. Mohan
Date Sep 14, 2005

Due to various causes noise is most often present on raw images. Generating masks or detecting edges using the noisy raw image is not satisfactory. The image is to be smoothed by a preprocess.

Gaussian blur is an image smoothing operation done by use of seperable symmetric matrix of convolution coefficients. The size can be any odd nimber between 3 (for a 3x3 grid size) to 11 (for a 11x11 grid). Given the size and standard deviation, the convolution weights are computed and applied.. In YUY2 and YV12 formats only the Y values are smoothed. However if u and or v are made true, those corresponding planes are also smoothed. In RGB formats all 3 color planes are smoothed.

RGB32, RGB24, YUY2 and YV12 formats are supported.

Details of parameters
Description Name Type Limits Default
Input clip to be smoothed clip none
size of grid to use size integer odd number between 3 to 11 3
standard deviation sd float more than 0 1.5
is u plane smoothing required? u boolean true for yes, false for no false
is v plane smoothing required? v boolean true for yes, false for no false

Usage examples:-
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