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Reconstructing the image from specific number of coefficicents

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Ayesha
Ayesha 2014-1-19
关闭： MATLAB Answer Bot 2021-8-20
Hi there!
Alright, so I've been working on this little piece of code to construct an image using specific coefficicents and there's this error I'm getting:
Subscripted assignment dimension mismatch.
So the code goes this way:
j0=128;
M = 2^(-j0);
m=sqrt(M);
I = imread('lena.png');
J = perform_wavelet_transf(I,j0,+1);
n = size(I,1);
J1 = zeros(n);
J1(1:n/4,1:n/4) = J(1:m,1:m);
result = perform_wavelet_transf(J1,j0,-1);
imshow(result,[]);
I'm getting the error at this line: J1(1:n/4,1:n/4) = J(1:m,1:m);
What do you think?
And yes, Thanks alot!!! for your help in advance :)

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回答（1 个）

Amit
Amit 2014-1-19
One thing I see first is that M = 2^(-128) = 2.93e-39 and thus m = 5.42e-20 m is not an integer, thus J(1:m,1:m) would not work and give you atleast one error.
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Amit
Amit 2014-1-19
its alright. In a nut shell, I think there is a problem at M = 2^(-j0) which you use to define m = sqrt(M).
Please double check the algorithm that you must be following that this is the correct way to do this.

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