Block-matching algorithm: Difference between revisions

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=== Adaptive Rood Pattern Search ===
Adaptive rood pattern search (ARPS) <ref>{{cite journal|last1=Nie|first1=Yao|last2=Ma|first2=Kai-Kuang|title=Adaptive Rood Pattern Search for Fast Block-Matching Motion Estimation|journal=IEEE Trans. Image Processing|date=December 2002|volume=11|issue=12|pages=1442–1448|doi=10.1109/TIP.2002.806251|pmid=18249712|url=http://www3.ntu.edu.sg/home/ekkma/1_Publications_files/Adaptive%20rood%20pattern%20search%20for%20fast%20block-matching%20motion%20estimation%20%28IEEE%20TIP%20Dec%202002%29.pdf}}</ref> algorithm makes use of the fact that the general motion in a frame is usually [[coherence (physics)|coherent]], i.e. if the macro blocks around the current macro block moved in a particular direction then there is a high [[probability]] that the current macro block will also have a similar [[motion vector]]. This algorithm uses the motion vector of the macro block to its immediate left to predict its own motion vector.
 
Adaptive rood pattern search runs as follows: