Browsing by Author "Chou, Ting"

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A Smart Surveillance System with Multiple People Detection, Tracking, and Behavior Analysis
(2016)
Yang, Chia-Jui
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Chou, Ting
;
Chang, Fong-An
;
Chang Ssu-Yuan
;
Guo, Jiun-In
This paper proposes an intelligence surveillance system in indoor environments, which support the functions of people detection, people tracking, and behavior analysis. Strong variation of lightness by switching lights and frequent crossing of people are two major design challenges of the proposed system, which will decrease the detection accuracy. Therefore, we propose a mechanism of updating background to react to the variation of lightness. Moreover, the ORB descriptor is added to be a unique feature of identifying people. It can make people tracking more precise during crossing. The proposed system is developed on PCs and implemented on embedded systems. On PCs with Intel i7@3.4GHz CPU running with a single core, we can reach the performance about D1 video at 22 fps. On an embedded system with ARM CortexA9@ 1.0GHz, we can achieve the performance about D1 video at 8 fps.
Algorithm Derivation and Its Embedded System Realization of Speed Limit Detection for Multiple Countries
(2016)
Lin, Yi-Ting
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Chou, Ting
;
Vinay, M. S.
;
Guo, Jiun-In
;
電子工程學系及電子研究所
This paper proposes a low-complexity speed limit detection which can not only support different types of speed limit signs for multiple countries, but maintain good detection rate under inclement weathers. The proposed algorithm steps include shape detection to locate speed limit signs, adaptive threshold and digit recognition algorithm which can adapt to different digit fonts to support different types of speed limit signs for multiple countries. We implement the proposed algorithm on both the desktop and the automotive-grade i.MX 6 embedded system. Under D1 resolution (720x480), the proposed system can achieve 150 fps on the desktop and 30 fps on the i.MX 6 embedded system.