Comments on "A translation- and scale-invariant adaptive wavelet transform".
Xiong et al. presented a translationand scale-invariant adaptive wavelet transform. We show that their renormalized signal (pre-wavelet transform) is already translation- and scale-invariant. Thus, it is not just invariant under the wavelet transform. We give a necessary and sufficient condition for renormalized signals to be affine transform invariant.
Tian
Jun
J
Digimarc Corporation, Tualatin, OR 97062, USA. juntian@ieee.org