gaussianfilter.c File Reference

Gaussian filter operator. More...

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Detailed Description

Gaussian filter operator.

Usage: gaussianfilter in.pgm alpha out.pgm

Description: Deriche's recursive implementation of the smoothing filter operator (approximates the convolution with a Gaussian kernel). The parameter alpha (double) controls the spatial extension of the filter: 0 < alpha < infinity, typical value: alpha = 1. Intuitively, the "width" of the Gaussian kernel corresponds to 1/alpha.

Reference:
[Der90] R. Deriche, "Fast algorithms for low-level vision", IEEE Transactions on PAMI, 12(1), 78-87, 1990.

Types supported: byte 2d, long 2d, float 2d, byte 3d, long 3d, float 3d

Category: signal

Author:

Michel Couprie