Synopsis

HxImageRep HxGauss (HxImageRep img, double sigma, double truncation = 3.0)

Input

HxImageRep img

The image you want to convolve with a Gaussian.

double sigma

The sigma of the Gaussian, used in the convolution.

double truncation

The truncation determines at how many sigma the Gaussian filter is clipped.

Return value

HxImageRep

The result of convolving the input image img with a Gaussian. The result has double precision pixels.

Description

The function HxGauss convolves the input image with a Gaussian filter funtion that has a sigma `sigma'. The truncation determines the size of the filter in sigma, where the filter size, in sigma, is 2 times the truncation plus 1. HxGauss convolves the image with a 1 dimensional Gaussian kernel in every dimension. For vector images, each channel is convolved separately with the Guassian kernel.

Remarks

Valid image types

All types of images are allowed for this function. For vector images, each channel is treated separately.

Valid values for the parameters

sigma and truncation should both be greater than zero.

Border handling

This function uses MIRRORED border handling, see the section on Border handling.

See also

HxGaussDerivative2d, HxConvolution,

Keywords

Filter, Convolution, Gauss,

Generated on Mon Jan 27 15:45:00 2003 for GlobalFunctionGuide by 1.2.12 written by Dimitri van Heesch, © 1997-2001