A implementation of boxfilter

boxfilter 是均值滤波的一种改进。在以下这篇blog里面有介绍。

http://www.cnblogs.com/easymind223/archive/2012/11/13/2768680.html

这里我使用matlab对其进行实现。

可是这里边界问题没有处理好，假设viewer有好的意见欢迎告诉我

% % *********************************************************
% code writer      : EOF
% code file        : my_boxfilter.m
% code date        : 2014.10.21
% e-mail           : jasonleaster@gmail.com
%
% Code description :
%           Here is my implementation of boxfilter :)
%  It work correctly in the region where is not close to
%  the end boundary but will meet problem on some where
%  close to the image end boundary.
% *********************************************************function Filted_Img = my_boxfilter(Image)if size(Image,3) ~= 1fprintf('ERROR Imput-Image must be ##ONE## channel image\n');return;endHeight_Img = size(Image,1);Width_Img  = size(Image,2);Buffer     = zeros(1,Width_Img);Filted_Img = zeros(Height_Img,Width_Img);% treat this varible as a constantSEARCH_WIN_HEIGHT = 10;SEARCH_WIN_WIDTH  = 10;for row = 1: Height_Imgfor col  = 1: Width_Imgsum_value = 0;if (row + SEARCH_WIN_HEIGHT) < Height_Imgfor temp = row : (row + SEARCH_WIN_HEIGHT)sum_value = sum_value + Image(temp,col);endelsefor temp = row : Height_Imgsum_value = sum_value + Image(temp,col);end                endBuffer(col) = sum_value;endfor col = 1:Width_Imgif (col + SEARCH_WIN_WIDTH) < Width_Imgfor temp = col : col + SEARCH_WIN_WIDTHFilted_Img(row,col) =  Filted_Img(row,col) + Buffer(temp);endelsefor temp = col : Width_ImgFilted_Img(row,col) =  Filted_Img(row,col) + Buffer(temp);endendendendFilted_Img = Filted_Img./(SEARCH_WIN_HEIGHT * SEARCH_WIN_WIDTH);
end