第19卷
第10期
2011年10月
文章编号
1004-924X(2011)10-2541-09
光学精密工程
Optics and Precision Engineering
金相图像的晶界恢复与重建
蒋明星1.2*，陈国华1
（1.华南理工大学机械与汽车工程学院，广东广州510640：
2.华南农业大学理学院，广东广州510642)
Vol.19
No,10 Oct,2011
摘要：针对定量金相分析中金相图像的晶界恢复与重建以及数学形态学在图像处理中的特殊作用，从理论上证明了传统膨胀运算对图像灰度连续性的影响及影响程度与结构元素尺寸的关系，并对传统的膨胀运算的定义做了改进，据此提出了多尺度测地膨胀算法并以此恢复和重建金相图像的晶界。首先依据改进的膨胀运算对金相图像进行预处理；然后用多尺度选代腐蚀和多尺度测地膨胀方法得到品粒的种子；最后用条件粗化方法对晶粒的种子进行区域生长、产生晶界线。实验结果表明，与传统的重复测地膨账方法以及基于微分运算的图像分割等方法相比，本方法不仅可快速恢复与重建晶界线，而且获取的品晶界线更加清晰准确、连续光滑。
调：晶相图：晶界恢复；晶界重建；断胀；灰度连续性；多足度测地断账
关键
中图分类号：TP391.4
文联标识码：A
doi:10,3788/OPE.20111910,2541
Restorationand reconstructionof grain boundaryinmetallographicalimage
JIANG Ming-xing'-2, CHEN Guo-hua
(l. School of Mechanical and Automotive Engineering,
SouthChina Universityof Technology,Guangzhou510640,China;
2.Collegeof Science,SouthChinaAgricultural University,Guangzhou,510642,China)
Correspondingauthor,E-mail:Jiang-mr-scau@163.com
Abstract; According to the restoration and reconstruction of the grain boundaries in a metallographical image and the important role of mathematical morphology in image processing, the influences of tradi-tional dilation of mathematical morphology on the gray-scale continuity of an image was demonstrated theoretically, and the relationship between the degree of influence and the sizes of structural elements was discussed. Then, an improved definition for the traditional dilation was proposed. A multi-scale geodesic dilation algorithm was presented to restore and reconstruct the grain boundaries based on the improved definition of dilation. First, the metallographical image was preprocessed based on the im proved definition of dilation. Second, the seeds of the grains in the metallographical image were gotten by the methods of multi-scale iterative erosion and geodesic dilation. Finally, the grain boundaries in the metallographical image were obtained by the algorithm of conditioned dilation. Experimental re
收稿日期：2011-02-15；修订日期：2011-03-18.
基金项目：广东省自然科学基金资助项目（No,7006700)