Real-time motion detection using an analog VLSI zero-crossing chip
- Creators
- Bair, Wyeth
-
Koch, Christof
- Others:
- Mathur, Bimal P.
- Koch, Christof
Abstract
The authors have designed and tested a one-dimensional 64 pixel, analog CMOS VLSI chip which localizes intensity edges in real-time. This device exploits on-chip photoreceptors and the natural filtering properties of resistive networks to implement a scheme similar to and motivated by the Difference of Gaussians (DOG) operator proposed by Marr and Hildreth (1980). The chip computes the zero-crossings associated with the difference of two exponential weighting functions and reports only those zero-crossings at which the derivative is above an adjustable threshold. A real-time motion detection system based on the zero- crossing chip and a conventional microprocessor provides linear velocity output over two orders of magnitude of light intensity and target velocity.
Additional Information
© 1991 Society of Photo-Optical Instrumentation Engineers (SPIE). We thank Carver Mead for providing laboratory resources for the design, fabrication, and initial testing of this chip. Thanks also to Steve DeWeerth, Misha Mahowald, and John Harris for their help throughout the years. Our laboratory is partially supported by grants from the Office of Naval Research, the Rockwell International Science Center and the Hughes Aircraft Artificial Intelligence Center. Wyeth Bair is supported by a National Science Foundation Graduate Fellowship and performed some of this work at the Hughes Aircraft Al Center.Attached Files
Published - 59.pdf
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Additional details
- Eprint ID
- 91812
- Resolver ID
- CaltechAUTHORS:20181213-143632712
- Office of Naval Research (ONR)
- Rockwell International Science Center
- Hughes Aircraft Artificial Intelligence Center
- NSF Graduate Research Fellowship
- Created
-
2018-12-19Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Koch Laboratory (KLAB)
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 1473