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Proceedings Paper

Light source target recognition based on horizontal projection and differential algorithm
Author(s): Liang Zhang; Wei-min Chen
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Paper Abstract

In the image-based bridge deflection measurement system, changes in weather and interference of background cause light source target hard to accurately recognize. Through analyzing the principle of image-based deflection measurement, a conclusion was drawn that small error in light source target in image recognition cause larger error in deflection because of amplification of optical measurement system. In order to solve the problem, analyzed gray level characteristic of target image, and proposed an image enhancing method. In addition, a new method based on horizontal projection and differential algorithm is adopted for recognition of light source target. Finally, we use gray weighted centroid algorithm to realize sub-pixel location of light source target. Moreover, experiments were done for target image with poor quality. The experimental results show that the method is adaptable to the changing weather.

Paper Details

Date Published: 24 November 2009
PDF: 9 pages
Proc. SPIE 7513, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology, 75130R (24 November 2009); doi: 10.1117/12.837595
Show Author Affiliations
Liang Zhang, Chongqing Univ. (China)
Wei-min Chen, Chongqing Univ. (China)


Published in SPIE Proceedings Vol. 7513:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology
Toru Yoshizawa; Ping Wei; Jesse Zheng, Editor(s)

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