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Pulse-based 2-D motion sensors

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3 Author(s)
C. M. Higgins ; Div. of Biol., California Inst. of Technol., Pasadena, CA, USA ; R. A. Deutschmann ; C. Koch

We present two compact CMOS integrated circuits for computing the two-dimensional (2-D) local direction of motion of an image focused directly onto the chip. These circuits incorporate onboard photoreceptors and focal plane motion processing. With fully functional 14×13 and 12×13 implementations consuming less than 50 μW per pixel, we conclude that practical pixel resolutions of at least 64×64 are easily achievable. Measurements characterizing the elementary one-dimensional motion detectors are presented along with a discussion of 2-D performance and example 2-D motion vector fields. As an example application of the sensor, it is shown that the array as fabricated can directly compute the focus of expansion of a 2-D motion vector field

Published in:

IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing  (Volume:46 ,  Issue: 6 )