Range estimation by optical differentiation
- 1 July 1998
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America A
- Vol. 15 (7) , 1777-1786
- https://doi.org/10.1364/josaa.15.001777
Abstract
We describe a novel formulation of the range recovery problem based on computation of the differential variation in image intensities with respect to changes in camera position. This method uses a single stationary camera and a pair of calibrated optical masks to measure this differential quantity directly. We also describe a variant based on changes in aperture size. The subsequent computation of the range image involves simple arithmetic operations and is suitable for real-time implementation. We present the theory of this technique and show results from a prototype camera that we have constructed.Keywords
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