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1 November 1992 Motion estimation: the concept of velocity bandwidth
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Proceedings Volume 1818, Visual Communications and Image Processing '92; (1992) https://doi.org/10.1117/12.131368
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States
Abstract
This paper shows that like spatial and temporal frequencies, velocity is subject to aliasing. The analysis is based on studying a two dimensional sinusoidal signal moving at constant velocity. It is shown that given the spatio-temporal grid used to sample the image, displacement of a sinusoidal signal must remain confined to a well defined two dimensional domain to avoid velocity aliasing. Analytical derivations to the aliasing-free domains are provided for various sampling lattices such as the rectangular field-interlaced and offset field-interlaced (quincunx) sampling grids. The paper concludes with a few suggestions regarding how the concept of velocity bandwidth can be helpful in the estimation of object displacement in digital video sequences. In particular, bounds for the search domains use in multiscale block matching- based motion estimation algorithms are derived.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Regis J. Crinon and Wojciech J. Kolodziej "Motion estimation: the concept of velocity bandwidth", Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); https://doi.org/10.1117/12.131368
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