Spatiotemporal filtering for visual motion estimation from real images

Patrizia Baraldi; Massimo Tistarelli; Giulio Sandini; Francesca Gandolfo

doi:10.1117/12.135182

14 February 1992 Spatiotemporal filtering for visual motion estimation from real images

Patrizia Baraldi, Massimo Tistarelli, Giulio Sandini, Francesca Gandolfo

Proceedings Volume 1613, Mobile Robots VI; (1992) https://doi.org/10.1117/12.135182
Event: Robotics '91, 1991, Boston, MA, United States

Abstract

The effects of regularization techniques applied to the estimation of visual motion are investigated. A new method to compute the optical flow from a sequence of time-varying images is used. It is based on second-order derivatives of the image brightness and it is applied to evaluate 3-D motion parameters like the time-to-impact from translational motion. In particular, quantitative results are presented on the influence that spatio-temporal filtering of real image sequences with 2-D and 3-D (where the third dimension is time) smoothing operators has on the estimation of such parameters. The experiments show that, performing a three-dimensional filtering of the image sequence, remarkable accuracy can be reached, even using a small spatial kernel. Moreover, computing the optical flow only on intensity edges it gives the same 3-D motion parameter estimate as considering the whole field, provided that a small spatial kernel is used. The experiments presented in this paper demonstrate the applicability of the methods to a large number of computer vision applications.

Citation Download Citation

Patrizia Baraldi, Massimo Tistarelli, Giulio Sandini, and Francesca Gandolfo "Spatiotemporal filtering for visual motion estimation from real images", Proc. SPIE 1613, Mobile Robots VI, (14 February 1992); https://doi.org/10.1117/12.135182

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KEYWORDS

Optical flow

Image filtering

Digital signal processing

Motion estimation

3D image processing

Gaussian filters

Optical filters

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