基于Otsu阈值法与形态学自适应修正的舌像分割方法  

A tongue image separation method based on Otsu threshold method and morphological adaptive correction

作　　者：姜朔[1] 胡洁[1] 夏春明[2] 戚进[1] 彭颖红[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]华东理工大学机械与动力工程学院,上海200237

出　　处：《高技术通讯》2017年第2期150-155,共6页Chinese High Technology Letters

基　　金：国家重点研发计划专项(2016YFF0101602;2016YFC0104104);国家重大科学仪器设备开发专项(2013YQ03065105);上海交通大学"医工交叉研究基金"(YG2014MS12)资助项目

摘　　要：为了从原始舌图像中精确分割出舌体以实现中医舌诊的客观化,提出了一种基于Otsu阈值法与形态学自适应修正的舌像分割方法。该方法提取原始舌像的RGB色彩空间与HSV色彩空间中G、B、V通道的信息,运用Otsu阈值法对舌像进行二值化,基于先验知识对目标区域进行聚类,采用形态学运算方法,利用舌体当量直径自适应选取结构元素的大小,对聚类结果进行开启运算修正得到舌像分割结果。基于200幅不同形态、不同舌色类别原始舌像的实验结果表明,该方法能稳定精确地分割出舌体,与传统的Otsu方法及灰度投影-Otsu方法相比,准确率有了很大的提升。To accurately separate the tongue body from original tongue images to realize the characterization of tongue di- agnosis in traditional Chinese medicine, a new tongue image separation method based on the Otsu threshold method and morphology adaptive correction is put forward. The method extracts the information of the channels of G, B and V in the RGB color space and the I-ISV color space of original tongue images, performs binarization for tongue ima- ges with the Otsu threshold method, clusters target areas based on priori knowledge, self-adaptively selects the size of structure elements with the tongue body equivalent diameter and the morphological algorithm, and gives the clus- tering operation correction to obtain the tongue image separation results. The results of the experiments on 200 origi- nal tongue images with different forms and different tongue color categories show that this method can separate the tongue body stably and accurately, with greater improvements in accuracy compared with the traditional Otsu meth- od and the gray projection-Otsu method.

关 键 词：图像处理 舌诊客观化 舌像分割 Otsu阈值法 形态学运算 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]