www.gusucode.com > 光流场计算 MATLAB 源码 optical flow源码程序 > 光流场计算 MATLAB 源码 optical flow源码程序/hs0/gaussFilter.m
function G=gaussFilter(segma,kSize) % Creates a 1-D Gaussian kernel of a standard deviation 'segma' and a size % of 'kSize'. % % In theory, the Gaussian distribution is non-zero everywhere. In practice, % it's effectively zero at places further away from about three standard % deviations. Hence the reason why the kernel is suggested to be truncated % at that point. % % The 2D Gaussian filter is a complete circular symmetric operator. It can be % seperated into x and y components. The 2D convolution can be performed by % first convolving with 1D Gaussian in the x direction and the same in the % y direction. % % Author: Mohd Kharbat at Cranfield Defence and Security % mkharbat(at)ieee(dot)org , http://mohd.kharbat.com % Published under a Creative Commons Attribution-Non-Commercial-Share Alike % 3.0 Unported Licence http://creativecommons.org/licenses/by-nc-sa/3.0/ % % October 2008 if nargin<1 segma=1; end if nargin<2 kSize=2*(segma*3); end x=-(kSize/2):(1+1/kSize):(kSize/2); G=(1/(sqrt(2*pi)*segma)) * exp (-(x.^2)/(2*segma^2));