gaussian

module daffodil.filter.gaussian

A gaussian filter (aka gaussian blur) is a convolution (daffodil.filter.convolve) using a matrix created from a gaussian distribution.

real gaussianDistribution(real x, real stDev = 1, real mean = 0)

Evaluate the gaussian/normal distribution for a given x, stDev and mean.

real[] gaussianMatrix(real stDev = 1, real maxDev = 3)

Create a 1D matrix of a discrete gaussian distribution with a given standard deviation and the number of standard deviations to stop generating at. The result is mirrored with guaranteed odd length.

The result can be used to convolve a image.

auto gaussianBlurred(string axis = "xy", V)(const Image!V image, real stDev = 1, real maxDev = 3)

Return a copy of image with a gaussian blur applied across axies axis with a given standard deviation and the number of standard deviations to stop at.