Re: DWT and Data Compression

For lossless compression, you would typically use reversible integer to
integer wavelet transforms (keywords for googling). One of the papers
that might be helpful is:

Reversible Integer-to-Integer Wavelet Transforms for Image Compression:
Performance Evaluation and Analysis
Michael D. Adams, Faouzi Kossentini, IEEE TRANSACTIONS ON IMAGE
PROCESSING, VOL. 9, NO. 6, JUNE 2000

Hope this helps
Raja

Umutesi Faith wrote:
Hello

About the DWT:
The DWT provides data compression by setting a threshold value and all
coefficients that are less than the choosen value will be reduced to zero
or eliminated and the signal can be reconstructed from the thresholded
coefficients.
Therefore, I would like to ask about the lossless compression , does this
involve just the DWT and IDWT without setting any threshold value? or does
it involve more than that?

Thanks in advance

.