Phase-based measurement of object velocity in image sequences using the Hough transform

David St. G. Vernon

doi:10.1117/1.600845

1 September 1996 Phase-based measurement of object velocity in image sequences using the Hough transform

David St. G. Vernon

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Optical Engineering, Vol. 35, Issue 9, (September 1996). https://doi.org/10.1117/1.600845

An alternative to traditional spatiotemporal gradient and feature-based approaches to measuring object velocity in images is introduced. Here, the velocity is computed by treating each object as a distinct intensity wave profile, with Fourier components, and by identifying the Fourier components that exhibit the magnitude and phase changes that are consistent with anticipated velocity wave motion. This detection is accomplished using an appropriate Hough transform. The two major advantages of this technique are that because the analysis takes place in the Fourier domain, the spatial organization and the visual appearance of the moving object are not significant and, second, the formulation presented in this paper lends itself to direct extension for more complex motion. Consequently, objects that are visually or spatially complex and that would be difficult to analyze using either of the traditional spatiotemporal differentiation or feature-based approaches can be effectively treated. The proposed approach is demonstrated for scenes of varying complexity.

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David St. G. Vernon "Phase-based measurement of object velocity in image sequences using the Hough transform," Optical Engineering 35(9), (1 September 1996). https://doi.org/10.1117/1.600845

Published: 1 September 1996

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