Quantizing a image after dwt

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kash
kash le 10 Déc 2012
I saw a demo in
http://www.mathworks.in/help/wavelet/ug/true-compression-for-images.html
in that i have performed dwt and have coefficients and have taken threshold,mow i want to quantize those threshold value as given ,please help how to perform quantization and encoding

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