The system and the method of deciding the number of people of the crowd making use of Visualhull

摘要

The system, the device and the method of deciding the number of people of crowd making use of Visual hull information are presented. In one execution form, the picture sensor crowd forms the picture of conventional type. The silhouette picture is decided next on the basis of the picture of conventional type. The intersection territory of the silhouette picture cone and operational capacity is decided. Projection to with respect to plane surface of the intersection territory is decided. You can gather the plane surface projection from several picture sensors, by making the picture sensor cross, subdivision pattern is formed. Those of the sky are identified with the polygon really, are excluded. The bounds pair of number of people inside the individual polygon being decided, it is retained in tree data structure. This tree with lapse of time receives new information from the picture sensor, is renewed. Number of people of crowd are equal to the lower limit of the route node of the tree.