Wavelet and image processing
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Hi there!
Alright, so I've been working on this little piece of code to approximate image using wavelets and there's this error I'm getting:
Subscripted assignment dimension mismatch.
So the code goes this way:
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've been wondering since hours on what could possibly go wrong with this piece and I guess somethings not right with
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 :)
2 Commenti
Risposte (1)
Walter Roberson
il 17 Gen 2014
You have not shown us how you construct "m" so all we can do is hypothesize that you construct it without regard for the actual size of lena.png
2 Commenti
Walter Roberson
il 24 Gen 2017
sqrt(2^-128) is 2^-64, which is a number less than 1. 1:m would then be the empty range, so J(1:m,1:m) would be empty. You are trying to store that empty range into a non-empty location.
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