Motion Estimation with Half-Pixel Accuracy. Furht, B., editor In Encyclopedia of Multimedia, pages 440–441. Springer US, 2008. 00000
DefinitionHalf-pixel accurate motion vectors can be found by interpolating the current frame and reference frame by a factor of two and then using any of the fast block matching algorithms for motion estimation.In real world video sequences, the true frame-to-frame displacements are unrelated to the integer pixel sampling grids. Thus, the motion prediction accuracy is limited to integer-pel accuracy. In fact, the motion prediction accuracy can be improved by half-pel accurate motion estimation. That is to determine motion vectors with half-pel accuracy. Many coding standards [1,2] permit motion vectors to be specified to a half-pixel accuracy.Half-pixel accurate motion vectors can be found by interpolating the current frame and reference frame by a factor of two and then using any of the fast block matching algorithms for motion estimation. The method in finding the half-pel accurate motion vector is illustrated as follows.Step 1 Find the motion vector with integer-pixel accu ...
@incollection{furht_motion_2008-1,
title = {Motion {Estimation} with {Half}-{Pixel} {Accuracy}},
copyright = {©2008 Springer-Verlag},
isbn = {978-0-387-74724-8 978-0-387-78414-4},
url = {http://link.springer.com/referenceworkentry/10.1007/978-0-387-78414-4_116},
abstract = {DefinitionHalf-pixel accurate motion vectors can be found by interpolating the current frame and reference frame by a factor of two and then using any of the fast block matching algorithms for motion estimation.In real world video sequences, the true frame-to-frame displacements are unrelated to the integer pixel sampling grids. Thus, the motion prediction accuracy is limited to integer-pel accuracy. In fact, the motion prediction accuracy can be improved by half-pel accurate motion estimation. That is to determine motion vectors with half-pel accuracy. Many coding standards [1,2] permit motion vectors to be specified to a half-pixel accuracy.Half-pixel accurate motion vectors can be found by interpolating the current frame and reference frame by a factor of two and then using any of the fast block matching algorithms for motion estimation. The method in finding the half-pel accurate motion vector is illustrated as follows.Step 1 Find the motion vector with integer-pixel accu ...},
language = {en},
urldate = {2016-05-03},
booktitle = {Encyclopedia of {Multimedia}},
publisher = {Springer US},
editor = {Furht, Borko},
year = {2008},
note = {00000},
pages = {440--441}
}
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