一种基于细菌觅食优化算法的舌体分割算法  

Tongue Segmentation Algorithm Based on Improved Bacteria Foraging Optimization Algorithm

作　　者：朱峰 戴璞微 潘斌 郭小明 王玉铭 钟凡[2] ZHU Feng;DAI Pu-wei;PAN Bin;GUO Xiao-ming;WANG Yu-ming;ZHONG Fan(Liaoning Shihua University,Fushun Liaoning 113001,China;Shandong University,Qingdao Shandong 250101,China)

机构地区：[1]辽宁石油化工大学,辽宁抚顺113001 [2]山东大学,山东青岛250101

出　　处：《图学学报》2019年第1期70-77,共8页Journal of Graphics

基　　金：国家自然科学基金项目(61602228;61572290);辽宁省自然科学基金项目(2015020041)

摘　　要：针对医学舌体数字图像的准确分割,提出了一种基于细菌觅食优化算法(BFOA)和Snake活动轮廓模型相组合的舌体分割算法。首先,以信息熵与Kapur算法相结合作为自适应函数来改进BFOA算法,通过改进的BFOA算法计算舌体图像的最佳图像二值化阈值,并将舌体图像二值化;然后,利用舌体图像的对称性提取舌体的关键边缘点,并基于B-样条插值算法由关键点集合插值得到闭合的B-样条曲线,作为Snake模型的初始轮廓;最后,通过Snake模型计算求解,即可准确提取舌体的轮廓曲线。实验结果表明,改进算法能够高精度地分割出舌体图像,并能消除基本Snake模型在初始轮廓曲线选取中存在的人机交互难题,实现了舌体图像的自动分割。Aimed at the accurate segmentation of medical digital image of tongue,this study proposed a tongue segmentation algorithm based on bacteria foraging optimization algorithm(BFOA)and Snake active contour model.Firstly,information entropy threshold method and Kapur algorithm are combined to improve BFOA,and then the improved BFOA is used to get the optimal threshold value,then binarize the tongue image.Secondly,the key contour points of the tongue coating are extracted according to the symmetry.Finally,the B-spline interpolation is performed by using the key points to obtain the closed B-spline curve as the initial contour of the Snake model,by which the external contour of the tongue edge is accurately extracted.The results show that the proposed algorithm can improve the accuracy of tongue segmentation and reduce human-computer interaction.

关 键 词：舌体分割 细菌觅食优化算法 SNAKE模型 关键点提取 B-样条曲线 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]