Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (39): 7230-7233.doi: 10.3969/j.issn.1673-8225.2011.39.003

Previous Articles     Next Articles

Needle-holder markers detection based on an improved Hough Transform

Zhang Rui-juan, Wu Xue-mei, Liu Qi   

  1. Electrical Information College, Sichuan University, Chengdu  610065, Sichuan Province, China
  • Received:2011-04-17 Revised:2011-08-29 Online:2011-09-24 Published:2011-09-24
  • Contact: Liu Qi, Doctor, Associate professor, Master’s supervisor, Electrical Information College, Sichuan University, Chengdu 610065, Sichuan Province, China liuqi@scu.edu.cn
  • About author:Zhang Rui-juan★, Studying for master’s degree, Electrical Information College, Sichuan University, Chengdu 610065, Sichuan Province, China zhrj1025@163.com

PDF

312

Abstract:

BACKGROUND: Stereo-match is the nodus of passive-optical-localization, because the images usually are influenced by noise, illumination change, shielding, perspective, distortion and so on.
OBJECTIVE: To simplify the stereo-match algorithm, we derived the markers of the needle-holder’s balls by using an improved Hough Transform of circle detection.
METHODS: The improved Hough Transform of circle detection was used to detect the stereograph. We could gain the markers of the needle-holder’s balls. And then we used the knowledge of geometry to mark the needle-holder’s balls.
RESULTS AND CONCLUSION: Results showed that that this improved Hough Transform was fast enough, stable and accurate when we used it to derive the markers of the needle-holder’s balls. We could use the method to substitute stereo-match in passive optical localization, which could lay the foundation of stereotaxy.

CLC Number: