The Continuous Wavelet Transform in Image Processing

this paper is to survey the theory and some applications of the 2D continuous WT. We begin in Section 2 by briefly reviewing the mathematical basis of the theory and the problem of practical implementation. Then, in Section 3 and 4, respectively, we describe various types of 2-D wavelets and discuss the problem of calibration. In Section 5, we compare the CWT with the discrete approach, and present fast algorithms for the CWT. In Section 6, finally, we review some applications of the CWT to different physical problems