Global Motion Estimation

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Global Motion Estimation
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????? ???? ??? ????? pp3
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????? ?????? ??????? ????? ???????.16x16
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????? ???? (????)
????? ????? ?????( local motion vector) ?????
????? ????? ( global motion vector)
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????? ???? (????)
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• ????? ???? ????? ???? ?? ???? (MV)
• ????? ??? ?????? (GMV)

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X
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Y
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????? ??? (Full search)
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(TSSThree stage search)
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(Diamond search)
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????? ??? (FS)
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????? ????? ?????? (TSS)
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• ?????? ????? ?????? ?????? ?"? ???????? SAD.
• ???????? ?? ???? ?? ????? ??? ??? ????-??????.
  ???? ????? ?????? ???? ???? ???????? ?? SAD ???
  ??? ????-??????.

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????? ????? ?? ????? SAD ??????? ?? 16x16 ???????
P
R
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????? ?????? ???????.MPI
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Shared memory ????? ????? ??????.
for ( all macroblocks ) for ( each macroblock
) SAD SAD P(i) - R(i)
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Shared memory

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???????? ?????? ?-GMV
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????? ???