Dwt transformation in RGB image.

How can I perform dwt transformation in RGB image without using wavemenu tools. It is showing an error regarding that it should be between 0.0 and 1.0. Answer me pls as soon as possible......

Answer 1

[Image Analyst]

Try passing it into im2double() first.

[Irshad]

I have done the class conversion im2double still it's showing that " Error using ==> image Error using ==> image TrueColor CData contains element out of range 0.0 <= value <= 1.0", I am using true color image and want to decompose it by dwt without changing into grayscale. Please help me.

[Irshad]

 it would be grateful if you could send the correct coding
The coding I used is
"load banaswt
nbcol = size(map,1);
I=im2double(X)
[cA1,cH1,cV1,cD1] = dwt2(I,'db1');
whos
cod_X = wcodemat(I,nbcol);
cod_cA1 = wcodemat(cA1,nbcol);
cod_cH1 = wcodemat(cH1,nbcol);
cod_cV1 = wcodemat(cV1,nbcol);
cod_cD1 = wcodemat(cD1,nbcol);
subplot(2,2,1), image(wcodemat(cod_cA1,nbcol));
title('Approximation')
subplot(2,2,2), image(wcodemat(cod_cA1,nbcol));
title('Horiz. Detail')
subplot(2,2,3), image(wcodemat(cod_cA1,nbcol));
title('Vertical Detail')
subplot(2,2,4), image(wcodemat(cod_cA1,nbcol));
title('Diag. Detail')"

[Image Analyst]

Sorry I can't help. I don't have the Wavelet toolbox.