In this paper, we proposed a new method to detect 4D spatiotemporal interest point called 4D-ISIP (4 dimension implicit surface interest point). We implicitly represent the 3D scene by 3D volume which has a truncated signed distance function (TSDF) in every voxel. The TSDF represents the distance between the spatial point and object surface which is a kind of implicit surface representation. The basic idea of 4D-ISIP detection is to detect the points whose local neighborhood has significant variations along both spatial and temporal dimensions. In order to test our 4D-ISIP detection, we built a system to acquire 3D human motion dataset using only one Kinect. Experimental results show that our method can detect 4D-ISIP for different human actions.
CITATION STYLE
Li, S., Yilmaz, A., Xiao, C., & Li, H. (2017). 4D ISIP: 4D implicit surface interest point detection. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 10666 LNCS, pp. 162–173). Springer Verlag. https://doi.org/10.1007/978-3-319-71607-7_15
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