基于机器视觉的晶粒度面积法自动评级  

Automatic Grading of Grain Size by Planimetry Based on Machine Vision

作　　者：林金萱[1] 王桂棠[2] 肖乐萍[2] 

机构地区：[1]广东工业大学材料与能源学院,广东广州510006 [2]广东工业大学信息工程学院,广东广州510006

出　　处：《金属热处理》2007年第3期82-85,共4页Heat Treatment of Metals

基　　金：广东省科技计划重点项目(2004A10403008)

摘　　要：根据国标中晶粒度的定义提出进行晶粒度测量自动评级方法,论述了该方法中应用计算机图像处理技术进行图像尺寸标定、二值化变换、消除噪声、提取晶界和计算晶粒个数,最终计算晶粒度评级参数等过程的算法及实现。提取单像素晶界可解决不同晶粒晶界共用计数难问题;利用链码计算晶粒个数可通过限制链长在计数的同时把第二相、杂质等去除。该评级方法可以避免晶粒度测量评级中人为因素的影响,速度快,精确性高。对于非均匀等轴晶的评级比其他方法如截线法、截圆法等具有更好的适用性。The automatic measure grading method of grain size was put forward based on the definition of grain size in the Chinese Standards. Image dimension calibration, dimension offset from a real picture to a digital image, noise elimination, grain boundary extraction and grains count were performed by using computer image processing techniques. The difficulty of automatic grain counting due to one grain boundary shared by tow adjacent grains can be solved by picking up singleimage-element grain boundary. Second phases and impurities can be removed ing grain counting. This grading method can avoid man-made mistakes, and accuracy. For non-uniform equiaxed crystal,this method is better than others by limiting the length of freeman chain durhas the advantages of high speed and high like intercept and so on.

关 键 词：晶粒度 面积法 自动评级 机器视觉 

分 类 号：TG115.21[金属学及工艺—物理冶金]