Subpixel detection on extracting image detection point

LU Ning1, ZHU Kui1, YU Qingcang1, FENG Jingwu2
（1. College of Electronics and Information, Zhejiang SciTech University, Hangzhou 310018, China;
2. Faculty of Mechanical Engineering & Automation, Zhejiang SciTech University, Hangzhou 310018, China）

Abstract: Extracting image detection point is critical in image location and detection system. In order to solve the problems of the lower accuracy of binarization on extracting image detection point, subpixel location was used to extract image detection point. The advantages and disadvantages of three methods of subpixel location were proved according experiments. The subpixel location was evaluated on the experiments of stripe center line extracting and cross point of stripe center line extracted image detection point. The experiment results show that subpixel location is more accurate than the binarization on extracting image detection point.
Key words: detecting point; subpixel; binarization