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http://dx.doi.org/10.6109/jkiice.2011.15.2.455

Block Matching Algorithm Using an Adaptive Matching Block for Object Tracking  

Kim, Jin-Tea (한서대학교 컴퓨터정보공학과)
Ahn, Soo-Hong (코아로직)
Oh, Jeong-Su (부경대학교 이미지시스템공학과)
Abstract
In object tracking using the block mating algorithm, it is not proper to use a fixed matching block to track an object of which size may be various and can be changed at any time. This paper defines an adaptive matching block for the dynamic environment and proposes a block matching algorithm for it. The matching block is composed of a main-block of $10{\times}10$ pixels and 8 sub-blocks of $6{\times}6$ pixels in a wide area of $42{\times}42$ pixels, the main-block located its center is used as an object block, and the sub-blocks located its boundary are used as candidates for the object block. The proposed algorithm extracts the object blocks from the sub-blocks by using their motion vectors for 10 previous frames and performs the block matching with the main block and them. The experiments for perform estimation show that the proposed algorithm extracts just valid object blocks from the matching block and keeps an object having free movement in image center area.
Keywords
adaptive matching block; block matching; object tracking; motion vector;
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