UC知道matlab 小波
来源：百度知道 编辑：UC知道 时间：2024/06/02 14:05:39
x=imread('luoding.bmp'); %luoding.bmp是一幅24位图
[c,s]=wavedec2(x,2,'db1');
出现如下的错误：
??? Error using ==> vertcat
All rows in the bracketed expression must have the same
number of columns.
Error in ==> wavedec2 at 54
s = [size(x);s]; % store size
谢谢你，我试验过使用matlab自带的图像可以成功，可是不是matlab自带的图像，怎么也成功不了呢？比如luoding.bmp就是我自己放到work里面的一幅二维图像，会出现如下错误：
??? Error using ==> conv2
First and second arguments must be single or double.
Error in ==> wconv2 at 25
case 'row' , y = conv2(x,f(:)',shape);
Error in ==> dwt2 at 80
z = wconv2('row',y,Lo_D,'valid');
Error in ==> wavedec2 at 52
[x,h,v,d] = dwt2(x,Lo_D,Hi_D); % decomposition
[c,s]=wavedec2(x,2,'db1');
出现如下的错误：
??? Error using ==> vertcat
All rows in the bracketed expression must have the same
number of columns.
Error in ==> wavedec2 at 54
s = [size(x);s]; % store size
谢谢你，我试验过使用matlab自带的图像可以成功，可是不是matlab自带的图像，怎么也成功不了呢？比如luoding.bmp就是我自己放到work里面的一幅二维图像，会出现如下错误：
??? Error using ==> conv2
First and second arguments must be single or double.
Error in ==> wconv2 at 25
case 'row' , y = conv2(x,f(:)',shape);
Error in ==> dwt2 at 80
z = wconv2('row',y,Lo_D,'valid');
Error in ==> wavedec2 at 52
[x,h,v,d] = dwt2(x,Lo_D,Hi_D); % decomposition
彩色图像是3维矩阵，二维小波当然会出错，每一层分开处理即可
下面是例子：
x=imread('liftingbody.png');
imshow(x);%显示原图
[c,s]=wavedec2(double(x),2,'db1');%分解
y=waverec2(c,s,'db1');%重构
figure;imshow(uint8(y))%显示