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	An accurate and robust method for the measurement of circular holes based on binocular vision 期刊论文 OAI收割 MEASUREMENT SCIENCE AND TECHNOLOGY, 2020, 卷号: 31, 期号: 2, 页码: 1-10 作者: Xia RB(夏仁波); Su R(苏润); Zhao JB(赵吉宾); Chen YL(陈月玲); Fu SP(付生鹏) \| 收藏 \| 浏览/下载：25/0 \| 提交时间：2019/12/14 hole measurement edge extraction ellipse fitting
	A sub-pixel extraction method for the center of the circular structure from spot array calibration target (EI CONFERENCE) 会议论文 OAI收割 2012 3rd International Conference on Information Technology for Manufacturing Systems, ITMS 2012, September 8, 2012 - September 9, 2012, Qingdao, China 作者: Liu Y.; Zhang T.; Yang H.; Gao X.; Liu Y. 收藏 \| 浏览/下载：75/0 \| 提交时间：2013/03/25 The imaging measurement system must be calibrated before application. In calibration procedure sub-pixel center extraction is the crucial step for the final accuracy. In this paper a new sub-pixel extraction method is proposed. Edge detection at pixel level is obtained using LOG operator then sub-pixel edge detection is realized using the Facet model. Finally the least squares ellipse fitting is operated on the sub-pixel edge to determine the sub-pixel center. Experiment on a series of simulated images indicates that this algorithm is able to realize the center location accuracy of 0.01-0.02 pixel and meets the requirement of sub-pixel level. (2012) Trans Tech Publications Switzerland.
	A Robust Recognition Algorithm for Encoded Targets in Close-range Photogrammetry 期刊论文 OAI收割 JOURNAL OF INFORMATION SCIENCE AND ENGINEERING, 2012, 卷号: 28, 期号: 2, 页码: 407-418 作者: Xia RB(夏仁波); Zhao JB(赵吉宾); Liu WJ(刘伟军); Wu JH(吴剑煌); Fu SP(付生鹏) 收藏 \| 浏览/下载：25/0 \| 提交时间：2012/10/24 ellipse extraction close-range photogrammetry encoded target target recognition restriction criteria