Title :
Simultaneous noise reduction and feature enhancement in images using diamond-shaped 2-D filter banks
Author :
Lu, W.-S. ; Antoniou, A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
A two-dimensional (2-D) multiresolution method for simultaneous noise reduction and feature enhancement in images is described. 2-D multiresolution analysis is carried out using a tree structure based on a two-channel, diamond-shaped 2-D filter bank for improved performance and processing efficiency. In this framework, a digital signal processing unit is embedded between the analysis filters and synthesis filters. The noise that contaminates the image is reduced by a technique similar to the wavelet shrinkage method, while desirable features of the image are enhanced using a weighted synthesis of the subimages obtained from the multiresolution analysis
Keywords :
feature extraction; image enhancement; two-dimensional digital filters; analysis filters; diamond-shaped 2D filter banks; digital signal processing unit; feature enhancement; image enhancement; multiresolution method; noise reduction; processing efficiency; subimages; synthesis filters; tree structure; weighted synthesis; Digital filters; Digital signal processing; Filter bank; Image resolution; Multiresolution analysis; Noise reduction; Signal resolution; Signal synthesis; Tree data structures; Two dimensional displays;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.608987
