A new temporal domain optical flow measurement technique for focal plane VLSI implementation
- 30 December 2002
- proceedings article
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 241-250
- https://doi.org/10.1109/camp.1993.622478
Abstract
A new temporal domain technique for optical flow measurement is presented. This approach, which has been developed primarily for VLSI implementation, requires only the sign of spatiotemporal derivatives, 1-b Boolean multiplication and integer arithmetic to compute image velocity. Hence, it can be easily and efficiently implemented in hardware and software. It is composed of a hybrid of the Reichardt and Ullman-Marr motion models and measures both speed and direction at every pixel. For image sequences, it measures the number of frames required for an edge to translate over a pixel, while in analog hardware, it measures the time. Direction is given by correlating the disappearance of an edge at one pixel with its reappearance at a neighboring pixel. A test chip of this scheme has been implemented in 2 /spl mu/m VLSI and was found to measure 2-D velocity over three orders of magnitude. A total of 0.1 mW of power was consumed per pixel in room light. Therefore, this technique offers simple, computationally efficient, and direct means for measuring wide spatiotemporal bandwidth image motion in both hardware and software.Keywords
This publication has 12 references indexed in Scilit:
- Performance of optical flow techniquesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Computing motion using analog VLSI vision chips: An experimental comparison among different approachesInternational Journal of Computer Vision, 1992
- Multiplication-based analog motion detection chipPublished by SPIE-Intl Soc Optical Eng ,1991
- Implementing early vision algorithms in analog hardware: an overviewPublished by SPIE-Intl Soc Optical Eng ,1991
- Silicon retina with adaptive photoreceptorsPublished by SPIE-Intl Soc Optical Eng ,1991
- Real-time motion detection using an analog VLSI zero-crossing chipPublished by SPIE-Intl Soc Optical Eng ,1991
- A computational framework and an algorithm for the measurement of visual motionInternational Journal of Computer Vision, 1989
- Optical flow using spatiotemporal filtersInternational Journal of Computer Vision, 1988
- Temporal covariance model of human motion perceptionJournal of the Optical Society of America A, 1984
- Determining optical flowArtificial Intelligence, 1981