Liver cancer CT image enhancement using wavelet transform
- VernacularTitle:应用小波变换增强肝癌CT图像
- Author:
Zhiqiang WANG
;
Dan FENG
- Publication Type:Journal Article
- Keywords:
image enhancement;
wavelet transform;
multiresolution analysis;
liver cancer;
CT
- From:
Chinese Medical Equipment Journal
1993;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
This paper introduces the wavelet transform with multiresolution for liver cancer CT image enhancement. As the wavelet transform with compact support, orthogonality and approximately symmetry, SymletsA (sym4) wavelet family is applied to the two-layer multiscale decompose of the CT image. The decomposed wavelet coefficients are processed with the threshold values of 550, 350 and 250, with the low -frequency region intensified and the high-frequency one weakened. Then the image is reconstructed and thus the image is enhanced. Wavelet transform proves efficient in CT image enhancement.
