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Convergent Floating Thresholding Method
Tomoko Fujidai,Kazuhiro Kunishi,Jun’ichi Yamaguchi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, the authors propose a method for thresholding a gray-scaled image. In the method, a threshold for a coordinate is set by an iteration that is composed of the pixels detection from neighboring area and a calculation of a candidate threshold using the detected pixels. The candidate threshold settles down to a value, because the detected pixels finally become invariable. Therefore, the method can set the threshold which follows up a light changing and a contrast changing. The proposed method and the conventional methods were tested, using a preceding car images. We compared the method with other methods by an estimation based on a correlation on the thresholding. It was confirmed that the proposed method had more effectiveness than the conventional methods in case of brightnes change, contrast fall and image size change.