1 简介

图像在采集和传输过程中可能受到很多外界条件的污染,因此,为了保证图像提供给我们的信息比较准确,需要对图像进行去噪处理.通过Matlab软件分别用高通、低通、带通、方向多种滤波器对需要的图像进行去噪处理,同时比较几种去噪方法的优缺点,找到对图像质量影响最小,且去噪性能最好的方法.

2 部分代码

function PQ = paddedsize(AB, CD, PARAM)%PADDEDSIZE Computes padded sizes useful for FFT-based filtering. %   PQ = PADDEDSIZE(AB), where AB is a two-element size vector,%   computes the two-element size vector PQ = 2*AB.%%   PQ = PADDEDSIZE(AB, 'PWR2') computes the vector PQ such that%   PQ(1) = PQ(2) = 2^nextpow2(2*m), where m is MAX(AB).%%   PQ = PADDEDSIZE(AB, CD), where AB and CD are two-element size%   vectors, computes the two-element size vector PQ.  The elements%   of PQ are the smallest even integers greater than or equal to %   AB + CD - 1.%%   PQ = PADDEDSIZE(AB, CD, 'PWR2') computes the vector PQ such that%   PQ(1) = PQ(2) = 2^nextpow2(2*m), where m is MAX([AB CD]). %   Copyright 2002-2004 R. C. Gonzalez, R. E. Woods, & S. L. Eddins%   Digital Image Processing Using MATLAB, Prentice-Hall, 2004%   $Revision: 1.5 $  $Date: 2003/08/25 14:28:22 $if nargin == 1   PQ  = 2*AB;elseif nargin == 2 & ~ischar(CD)   PQ = AB + CD - 1;   PQ = 2 * ceil(PQ / 2);elseif nargin == 2   m = max(AB); % Maximum dimension.   % Find power-of-2 at least twice m.   P = 2^nextpow2(2*m);   PQ = [P, P];elseif nargin == 3   m = max([AB CD]); % Maximum dimension.   P = 2^nextpow2(2*m);   PQ = [P, P];else   error('Wrong number of inputs.')end

3 仿真结果

4 参考文献

[1]张宏伟. 基于MATLAB的图像去噪方法的研究与实现[J]. 大庆师范学院学报, 2016, 36(3):4.

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