[WM]: 2D DWT TRANSFORM

[Eyneen Altaf <eakamili@yahoo.co.in>]

Dear advisor,

I have a question pertaining to applying DWT transform to gray scale images.
I read a  grayscale gif image and then implement the
dwt2() transform in MATLAB.I am using the 'haar'filter. When i plot the image using the approximation and detail coefficients as in
'image([ca,ch;cv,cd]), i get colored subbands. How can i avoid this coloring of the subbands. On applying the
idwt2() transform the image that gets reconstructed is also colored. I wish to avoid this. Please advise.

Regards,
Annie



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