
第20卷第10期 2012年10月
文章编号
1004-924X(2012)10229307
光学精密工程
Optics and Precision Engineering
Vol.20
No.10 Oct.2012
视觉测量中可纠错的编码点识别及提取
杨剑,韩建栋,秦品乐
(1.中北大学电子与计算机科学技术学院,山西太原030051; 2.山西大学计算机与信息技术学院,山西太原030006;
3.计算智能与中文信息处理教育部重点实验室,山西太原030006))
摘要:针对视觉测量中经常发生椭圆点检测错误,影响三维场景的匹配,甚至影响三维重建的间题,设计了一种可纠错的编码点方案。将信息论中的信道可纠错编码方法用于编码点的设计,基于线性分组码将编码分为信息元和校验元,从而设计了生成矩阵和校验矩阵。在检测出错误时利用伴随式矩阵进行纠错,最后进行解码实现三维匹配。分析了编码点的解算及提取,从而大大提高了编码点的抗噪性。该方法不仅具有高的抗噪性能,同时可进一步拓展空间并且具有较好的实用价值。实验表明;文中设计的编码点方案完全可行,具有易于识别、可自行纠错的优点,在发生1位编码点错误的情况下可以实现100%纠错。
关键词:视党测量;编码点;纠错编码;编码点提取;编码点识别
中图分类号:TP391.4
文献标识码:A
doi10,3788/OPE,20122010.2293
Correctingerroronrecognitionof codedpointsforphotogrammetry
YANG Jian'·,HAN Jian-dong",QIN Ping-le
(1.School of Electronic and Computer Science &Technology,North Umiversity of China,Taiyuan 030051,China; 2.School of Computer and InformationTechnology,ShaniUniversity,Taiyan 030006,China;
3.KeyLaboratoryof the Ministry of Education for Computational Intelligenceand
ChineseInformation Processing,Taiyuan 030006,China) Correspondingauthor,E-mailyangjian9770@126.com
Abstract: As the mistakes of detecting ellipse points can cause the three-dimensional data matching er-ror, even the measuring task failure in a photogrammetric task,this paper proposes a new correcting scheme for error coded points. The scheme uses the channel code of information theory to design the code points, then divides the codes into information and verification elements based on the linear block codes, so that the generator matrix and the parity-check matrix are implemented. When errors hap pened, an adjoint matrix is used to correct the mistake. Finally, an encoding is performed to realize the three dimensional match. The proposed method improves the anti-noise property of code points greatly, and has good practical values and wide application prospects. Experiments show that the
收稿日期:2012-05-07;修订日期:2012-06-18
基金项目:山西省青年基金资助项目(No.2010021016-3);北京市工程研究中心(光电信息与仪器)开发研究课题资
助项目(No.BJGC20110016);2011年中北大学校科学基金资助项目