Question

MATLAB实现小波变换边缘提取 程序哪里放要处理的图片名

MATLAB实现小波变换边缘提取 哪里放要处理的图片名
程序如下，不用MATLAB自带图片实现，怎样更换？ 另外对图片的格式，大小有什么要求吗？
谢谢
clear all;
load wbarb; %小波变换边缘提取程序
I = ind2gray(X,map);%检索图转成灰度图
imshow(I);
I1 = imadjust(I,stretchlim(I),[0,1]);%调整图像的像素值，可以改变对比度和颜色
figure;
imshow(I1);
[N,M] = size(I);

h = [0.125,0.375,0.375,0.125];
g = [0.5,-0.5];
delta = [1,0,0];

J = 3;

a(1:N,1:M,1,1:J+1) = 0;
dx(1:N,1:M,1,1:J+1) = 0;
dy(1:N,1:M,1,1:J+1) = 0;
d(1:N,1:M,1,1:J+1) = 0;

a(:,:,1,1) = conv2(h,h,I,'same');
dx(:,:,1,1) = conv2(delta,g,I,'same');
dy(:,:,1,1) = conv2(g,delta,I,'same');

x = dx(:,:,1,1);
y = dy(:,:,1,1);
d(:,:,1,1) = sqrt(x.^2+y.^2);
I1 = imadjust(d(:,:,1,1),stretchlim(d(:,:,1,1)),[0 1]);figure;imshow(I1);

lh = length(h);
lg = length(g);

for j = 1:J+1
lhj = 2^j*(lh-1)+1;
lgj = 2^j*(lg-1)+1;
hj(1:lhj)=0;
gj(1:lgj)=0;
for n = 1:lh
hj(2^j*(n-1)+1)=h(n);
end

for n = 1:lg
gj(2^j*(n-1)+1)=g(n);
end

a(:,:,1,j+1) = conv2(hj,hj,a(:,:,1,j),'same');
dx(:,:,1,j+1) = conv2(delta,gj,a(:,:,1,j),'same');
dy(:,:,1,j+1) = conv2(gj,delta,a(:,:,1,j),'same');

x = dx(:,:,1,j+1);
y = dy(:,:,1,j+1);
dj(:,:,1,j+1) = sqrt(x.^2+y.^2);

I1 = imadjust(dj(:,:,1,j+1),stretchlim(dj(:,:,1,j+1)),[0 1]);figure;imshow(I1);
end
我还尝试把matlab自带的wbarb图片换成lean图片，但提示有错误??? Error using ==> load
Unable to read file lean: No such file or directory.请问是什么原因

Answer 1

从你的load wbarb; %小波变换边缘提取程序
I = ind2gray(X,map);%检索图转成灰度图
可以看出wbarb预先已经有了X和map
先确保你的lean业含有X和map参数，如果没有，可以试着先转换成索引图片，然后再运行该程序

Answer 2

你把你的图片保存到原来的图片所在的文件夹，不然可能不识别你的路径．