[WM]: Lossless wavelet transform

[Siamak Yousefi <syousefy@yahoo.com>]

Dear Watermarkers
   
  I have read some papers that say Integer Wavelet Transform is a lossless transform. So they use it for some applications such as
reversible watermarking. Why Integer Wavelet Transform is reversible while Discrete Wavelet Transform is not reversible? 
  I transformed an image by DWT2 in Matlab and losslessly retreived the original image with the IDWT2. 
  Are those conflicting concepts or I do it wrong?
   
  Regards
  Yousefi
   
   



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