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| Fast Spatial-Temporal Feature Point Detection Based on Local Neighbor Pixels |
| QIN Hua-Biao, ZHANG Ya-Ning, CAI Jing-Jing |
| School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510640 |
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Abstract To solve the problem of low computational efficiency and many redundant feature points in feature point detection algorithm, a fast spatial-temporal feature point detection algorithm based on local neighbor pixels is proposed. The spatial-temporal feature points are located quickly by finding the points with great difference in pixel value in 3D spatial-temporal local neighborhood. Then the redundant feature points are removed with the 3D non-maxima suppression method, and the screened feature points are applied to human action recognition. In addition, the range of pixel segmentation threshold in local area and other detection problems of parameter optimization are analyzed according to binomial probability distribution principle. The experimental results show that the proposed algorithm not only improves the speed of feature point detection but also reliably detects enough amounts of feature points with the least redundancy, which leads to the high accuracy in human action recognition.
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Received: 19 June 2013
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2015, Vol. 28 
