Abstract
Spatial occlusion is an important way for human beings to build up the visual perceptions and the awareness of environments. Focusing on 2D disk-like objects, a new framework INterval and DUration (INDU) Occlusion Calculus is proposed. It includes 39 basic relations. This formalism extends Interval Occlusion Calculus with the relative size information. Also, it can be seen as an extension of INDU calculus with interval-based definitions of spatial occlusion. INDU Occlusion Calculus is closed under intersection, inverse and composition. And its running complexity results are presented. The partitions of the plane by the basic INDU occlusion relations are systematically discussed under different situations. These partitions decide the possible paths describing the continuous movements of the observers and the observed relations in the transition network. Several application scenarios observed by single or multiple viewpoints are discusses with examples.
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Acknowledgements
This paper is supported by National Natural Science Foundation of China under Grant Nos. 61502198, 61472161, 61402195, 61103091 and the Science and Technology Development Plan of Jilin Province under Grant No. 20160520099JH.
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Chen, J., Gao, A., Jia, H., Xu, Y., Zhou, X. (2021). Interval Occlusion Calculus with Size Information. In: Qiu, H., Zhang, C., Fei, Z., Qiu, M., Kung, SY. (eds) Knowledge Science, Engineering and Management . KSEM 2021. Lecture Notes in Computer Science(), vol 12816. Springer, Cham. https://doi.org/10.1007/978-3-030-82147-0_38
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