calculatewik.m

来自「基于小波的人脸识别算法的matlab实现」· M 代码 · 共 20 行

function WIk=CalculateWIk(I,Wk,width,height,step);
%计算图像I经过小波变换Wk后的结果图像；步长step表示，每隔step个点计算一次，即计算宽度为step的离散网格上的小波变换；
WIkAll=conv2(I,Wk,'same');
for x1=1:width/step
    for x2=1:height/step
        WIk(x1,x2)=abs(WIkAll(x1*step,x2*step));
    end
end
%Id = im2double(I);
%for x1=1:width/step
%    for x2=1:height/step
%        WIk(x1,x2)=0;
%        for x3=1:x1*step-1
%            for x4=1:x2*step-1
%                WIk(x1,x2)=WIk(x1,x2)+Wk(x1*step-x3,x2*step-x4)*Id(x3,x4);
%            end
%        end
%    end
%end