Motion identification from image sequences: Information theory and pixel selection
Computers & Mathematics with Applications
Fast and accurate global motion estimation algorithm using pixel subsampling
Information Sciences: an International Journal
New pixel-decimation patterns for block matching in motion estimation
Image Communication
Adaptive robust estimation of affine parameters from block motion vectors
Image and Vision Computing
A neighborhood elimination approach for block matching in motion estimation
Image Communication
Velocity tuned filters for motion estimation and segmentation in digital image sequences
Mathematical and Computer Modelling: An International Journal
Robust Video Restoration by Joint Sparse and Low Rank Matrix Approximation
SIAM Journal on Imaging Sciences
Multidimensional Systems and Signal Processing
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Two algorithms for block motion estimation that produce performance similar to that of exhaustive search but with computation reduced by a factor of 8 or 16 are presented. The algorithms are based on motion-field and pixel subsampling. A subsampled motion field is first determined by estimating the motion vectors for a fraction of the blocks. The motion vectors for these blocks are determined by using only a fraction of the pixels at any searched location and by alternating the pixel subsampling patterns with the searched locations. The subsampled motion field is then interpolated so that a motion vector is determined for each block of pixels. The algorithms are more robust than previously proposed fast algorithms and both can easily be combined with a hierarchical search strategy. One of the algorithms is fully compatible with MPEG-I