1. Ten Lectures on Wavelets;Daubechies,1992
2. A Wavelet Tour of Signal Processing;Mallat,1998
3. A computational approach to edge detection;Canny;IEEE Transactions of Pattern Analysis and Machine Intelligence,1986
4. Edge focusing;Bergholm;IEEE Transactions of Pattern Analysis and Machine Intelligence,1987
5. A.P. Witkin, Scale-space filtering: a new approach to multi-scale description, in: Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 9, IEEE, San Diego, CA, 1984, pp. 150–153.