24 November 2009 Light source target recognition based on horizontal projection and differential algorithm
Author Affiliations +
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.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Liang Zhang, Liang Zhang, Wei-min Chen, Wei-min Chen, } "Light source target recognition based on horizontal projection and differential algorithm", 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; https://doi.org/10.1117/12.837595
PROCEEDINGS
9 PAGES


SHARE
Back to Top