video processing - motion estimation by FS-LBP -

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I want to assess the proposal by the method of FS-LBP, but I need to find NNMN. I could not understand ⊗ symboll this formula is NNMN (M, N) = ΣΣLBPt (I, J) ⊗ LBPT-1 (I + M, J + N). - S ≤ M, N ≤ S - 1 LBPT is the current image. The LBPT-1 reference image frame (Previous Picture) is. Where the LBPT and LBPT-1 respectively change the LBP for current and reference frames, and S is the search range. NMN is the number of neighboring neighbors and reference frames around a macro-block central pixel in the current frame

⊗ Sembool XOr operation.
NNMN, 8 pixels of information for each pixel has its 8 neighbors. Search Block - + 16 (Size of Search Block is 48) Make LBPT-1. Set LBPT by macro block Macro block size (16,16). Scan to find maximum equality for macro blocks on search block.


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