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Previously, several efficient Hilbert scan-based operations were presented, but they all suffer from the constraint that the image size must be 2 r ×2 r . Considering an image with arbitrary size I 1 ×I 2 , this paper first presents an efficient snake scan-based algorithm for coding the Hilbert curve of the given image. The proposed coding algorithm takes O(k+logU)...
Motion estimation is one of the kernel issues in MPEG series. In this correspondence, a novel two-phase Hilbert-scan-based search algorithm for block motion estimation is presented. First in the intra-phase, a segmentation of the Hilbert curve is applied to the current block, then a novel coarse-to-fine data structure is developed to eliminate the impossible reference blocks in the search window of...
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