Range Estimation by Optical Differentiation
Published in:
Journal of the Optical Society of America, A
15(7): 1777-1786, July 1998.
© Optical Society of America.
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 directly
measure this differential quantity. We also describe a variant based
on changes in aperture size. The subsequent computation of the range
image involves simple arithmetic combinations, and is suitable for
real-time implementation. We present the theory of this technique and
results from a prototype camera which we have constructed.
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