How to make a loop to generate wavelet coefficients of multiple images and save them?

I am new to matlab i am hving problem to make a program. Can anyone help please

Answer 1

[Wayne King]

The wavelet coefficients are the output of wavedec2(). You can can simply save them in a matrix if the images are all the same size, or in a cell array if the images are not the same size

[seri]

i am not clear how to enter this info in loop

srcfiles=dir('C:\Users\Seri\Desktop\*.jpg');

for i=1: length (srcfiles)

filename=strcat('C:\Users\Seri\Desktop\',srcfiles(i).name);

I = imread(filename);

[c,s]=wavedec2(srcfiles,2,'db1');

sizesrcfiles = size (srcfiles)

size c=size(c)

val_s=s

ca2=appcoef2(c,s,'db1',2);

sizeca2=size(ca2)

ca1=appcoef(c,s,'db1',1);

sizeca1 = size(ca1)

end ??? Error using ==> double Conversion to double from struct is not possible.

Error in ==> dwt2 at 88 x = double(x);

Error in ==> wavedec2 at 66 [x,h,v,d] = dwt2(x,Lo_D,Hi_D); % decomposition this is showing this error

Answer 2

[Wayne King]

Why are you attempting to perform the wavelet transform on scrfiles?

 I = imread(filename);
 [c,s]=wavedec2(srcfiles,2,'db1');

You should be doing the wavelet transform on the image, I.

[seri]

than how to find coefficient?