基于分区OTSU法的沥青混合料图像分割技术  

Segmentation of Asphalt Mixtures Using X-ray Computed Tomography Images Based on Ring Block and OTSU Method

作　　者：李智[1] 刘佳辉[1] 

机构地区：[1]华南理工大学道路工程研究所,广州510641

出　　处：《武汉理工大学学报》2011年第6期50-53,58,共5页Journal of Wuhan University of Technology

基　　金：湖南省交通厅科技进步与创新计划项目(200809);广东省交通厅重点工程项目(2009-01-003);华南理工大学中央高校基本科研业务费资助项目(2009ZM0099)

摘　　要：针对CT扫描沥青混合料试件图像存在亮度差异及其灰度图无明显双峰的特点,提出了一种环状分区和最大类间方差法(OTSU法)相结合的自适应阈值选取方法,来解决CT图像处理过程中目标集料颗粒与沥青胶浆背景分割的技术难题,并从提高分割精度和运算速度两方面对最大类间方差法进行了改进性研究。不同分割方法的对比效果分析表明,采用环状分区和OTSU法相结合的新算法,可大大提高图像的分割效果,为处理扫描效果不理想以及复杂CT图像的目标对象分割提供了一个可行的解决手段。For the features of brightness differences in asphalt mixtures specimen using X-ray computed tomography images and no significant double peaks in their grayscales,this article proposed an adaptive thresholding method based on ring block and OTSU method,to solve the technical problems of Segmentation between Target aggregate particles and asphalt cement Background in the treatment processing of CT image,and carry out the research to improve the segmentation accuracy and computation speed for OTSU method.The analysis of contrasts among different segmentation methods demonstrate that using the new algorithm linking ring block with OTSU,which greatly improved the image segmentation,provides a viable means of settlement to deal with target segmentation of disatisfactory and the complex CT images.

关 键 词：道路工程 沥青混合料 图像分割 环形分区 OTSU法 

分 类 号：U416.2[交通运输工程—道路与铁道工程]