Fractional pixel motion estimation
Smita Gupta, A. Gersho · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1993
In this paper, we present a novel method for sub-pixel motion estimation. Compared to traditional methods, our technique offers a significantly reduced complexity by eliminating the explicit interpolation of pixel values at a finer sampling grid and avoiding the distortion evaluation for each candidate sub-pixel motion vector. Simulation results confirm that its performance is virtually indistinguishable from that of a traditional sub-pixel motion estimator. To illustrate applications of the new method we have developed a variable resolution motion estimator. The performance of the variable resolution motion estimator is evaluated by replacement of the fixed resolution motion estimator in Simulation Model 3 of MPEG-1 video compression standard by the variable resolution motion estimator.