Memory Efficient Multi-Resolution Motion Estimation in the Transform Domain
Jooheung Lee · ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications · 2007
In this paper, we propose multi-resolution motion estimation technique in the transform domain. Since the low-pass filtered and down-sampled image can be directly implemented by removing the high frequency DCT coefficients and inverse-transforming the low frequency DCT coefficients with down-sampled basis vectors, the traditional hierarchical search algorithm can be performed directly in the DCT domain. The proposed algorithm is compared with the motion estimation algorithms in the spatial domain to show its benefits in the aspects of PSNR, compression ratio, and frame memory size.