Abstract
SIFT matching is a quite robust matching approach for the usage of robust SIFT descriptor. In order to overcome the disadvantages brought by gray images, many color SIFT methods have been proposed. However those methods mainly focused on the improvement of SIFT descriptors. The excessive number of feature points, especially those useless points on background rather than a target, on the other hand, is not paid enough attention yet. This paper proposes an approach to improve the efficiency in SIFT matching. Using color filter to eliminate feature points with different color from those on a target. Therefore much calculation on descriptors and matching could be reduced so that the efficiency could be improved.
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