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김창대(Chang-Dae Kim),최서혁(Seo-Hyuk Choi),류성필(Sung-Pil Ryu),김동우(Dong-Woo Kim),안재형(Jae-Hyeong Ahn) 한국정보기술학회 2016 한국정보기술학회논문지 Vol.14 No.10
The flickering phenomenon of LED lamps may reduce the detection rate of the camera positions significantly. In order to address this problem, we propose the method that detects positions of smartphone cameras in order to put security stickers on it automatically. The method can reduce the security checking time that a guard attaches the stickers or checks whether they have been damaged or not at rush hour. The proposed method uses the adaptive frequency degree, applying appropriate weights according to predictive location and size of camera position after binarization with the adaptive threshold. The computer simulation results show that the proposed method increases the detection ratio than the previous ones in the LED lighting environment.