Optical Flow from 1D Correlation: Application to a Simple Time- to-crash Detector

Authors:
Nicola Ancona;Tomaso Poggio
Affiliations:
-;-
Venue:
Optical Flow from 1D Correlation: Application to a Simple Time- to-crash Detector
Year:
1993

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Abstract

A new technique exploiting 1D correlation of 2D or even 1D patches between successive frames may be sufficient to compute an estimation of optical flow field. Sparse measurements are used to compute qualitative properties of the flow for different visual tasks. We can combine our technique with a scheme for detecting expansion or rotation in an algorithm which suggests interesting biological implications. The algorithm provides a rough estimate of time-to-crash. It is well-suited for VLSI implementations. It was tested on real image sequences. We show its performance and compare the results to previous approaches.