High Time-Resolution Visual Motion Detection with Time Stamped Pixel Design

Authors:
Guangbin Zhang;Jin Liu
Affiliations:
Department of Electrical Engineering, the University of Texas at Dallas, Richardson, USA 75083-0688;Department of Electrical Engineering, the University of Texas at Dallas, Richardson, USA 75083-0688
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2006

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Abstract

This paper presents a visual motion sensor pixel structure, called time stamped architecture. In this structure, each pixel records asynchronously the transient time of the motion edges, then the information are read out frame by frame for post processing. This architecture is much less sensitive to the pixel level device parameter mismatches in previous velocity sensors while does not have the readout bottleneck problem in previous event-driven readout structures. Measured results show that the proposed pixel design can capture motion in 100 times higher time resolution than the frame rate. This enables much higher speed motion detection and greatly reduces the data transfer and computation load of the following digital processor. 2D array implementation and scalability issues are also discussed.