標題: A CMOS Bio-Inspired 2-D Motion Direction Sensor Based on a Direction Computation Method Derived From the Directionally Selective Ganglion Cells in the Retina
作者: Yang, Wen-Chia
Lin, Li-Ju
Chiueh, Herming
Wu, Chung-Yu
電子工程學系及電子研究所
友訊交大聯合研發中心
Department of Electronics Engineering and Institute of Electronics
D Link NCTU Joint Res Ctr
關鍵字: Directionally selective ganglion cell;direction sensor;retinal chip;vision chip
公開日期: 1-十二月-2011
摘要: A CMOS bio-inspired motion direction sensor structure and its associated computation method are proposed. Both method and structure with excitation-inhibition operation are derived from the directionally selective ganglion cells (DSGCs) in the retina to mimic their functions. Edge-number normalization for direction calculation and pseudo-random tessellation (PRT) structure for pixel layout arrangement are also proposed to enhance the accuracy of the computation. An experimental chip based on the proposed method and structure has been designed, fabricated, and measured. The chip comprised 32 x 32 pixels with a pixel size of 63 x 63 mu m(2) and a fill factor of 12.8%. The total chip size is 3.3 x 4.2 mm(2) and the power consumption is 9.9 mW in the dark and 21 mW at a maximum clock rate of 10 MHz with 3.3-V power supply. The fabricated chip has been measured with different moving patterns, and a computation error of less than 11 degrees has been accomplished. This verifies the correct functions of the proposed motion direction sensor. With the capability of real-time motion detection and processing under low power dissipation, the proposed sensor is feasible for many applications.
URI: http://dx.doi.org/10.1109/JSEN.2011.2158642
http://hdl.handle.net/11536/15876
ISSN: 1530-437X
DOI: 10.1109/JSEN.2011.2158642
期刊: IEEE SENSORS JOURNAL
Volume: 11
Issue: 12
起始頁: 3341
結束頁: 3351
顯示於類別:期刊論文


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  1. 000301878500021.pdf