摘要
图象增强方法的研究主要集中于复杂的自适应算法的研究 ,并且较多地适用于X射线图片和CT影像 ,针对内窥镜图象的增强方法研究较少。本文首先分析医用电子内窥镜图象的主要特点 ,提出基于照明反射模型的同态滤波方法 ,接着在简要介绍模型的原理、实现过程和特点的基础上 ,给出了适用的滤波函数模型和表达式 ;最后 ,将处理结果和其它图象增强方法相对比。实验证明此方法可以更多地保留图象细节 ,更好地抑制高频噪声和图象中高亮度的白色反光区域。
In recent years, researches on medical image are concentrated on highly sophisticated adaptive algorithms which are adapted to chest and breast radiographs and computer tomography. In this paper, the main features of endoscopic image are analyzed and homomorphic systems based on the illumination reflectance model are briefly presented. Then, principles and realization of the model are introduced and expression of the filter function of homomorphic systems is addressed. Finally, a performance evaluation together with a comparison with other enhancement techniques is given to demonstrate the feature of the illumination reflectance model.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
2000年第4期378-381,390,共5页
Chinese Journal of Biomedical Engineering
关键词
医用内窥镜
照明反射模型
图象增强
Medical endoscope
Illumination reflectance model
Homomorphic system
Image enhancementT
