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denoising an image

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FIR
FIR 2012-3-22
I have performed denoising of images using 2d-dwt,now how to plot each subbands such as
LL2,HL2,LH2,HH2,HL1,LH1,HH1,
my code is
I=imread('lena.bmp');
s=imresize(I,[256 256])
N = 256;
% Noise variance
sigma_n = 3;
n = sigma_n*randn(N);
% Add noise
x = double(s) + double(n);
% Run local adaptive image denoising algorithm using dual-tree DWT.
y = denoising_dtdwt(x);
please help

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