1. An information processing device including a processor comprising: a recognition result acquiring unit implemented by the processor, for acquiring respective recognition result information outputted by a plurality of recognition engines executing different recognition processes on recognition target data; and an integration recognition result outputting unit implemented by the processor, for outputting a new recognition result obtained by integrating the respective recognition result information acquired from the plurality of recognition engines, wherein: the recognition result acquiring unit is configured to acquire the respective recognition result information in a graph-structured or tree-structured data format being previously defined, from the plurality of recognition engines; and the integration recognition result outputting unit is configured to, when the respective recognition result information include information corresponding to each other in accordance with a predetermined standard, integrate each part of the respective recognition result information so as to be related to each other, and output in the graph structured or tree-structured data format as the new recognition result, and further, the recognition result acquiring unit is configured to acquire the recognition result information from an object recognition engine that recognizes an object from the recognition target data and a flow recognition engine that recognizes a flow representing a trajectory of a predetermined object from the recognition target data respectively; and the integration recognition result outputting unit is configured to, based on the recognition result information acquired from the object recognition engine and the recognition result information acquired from the flow recognition engine, examine an identity of a person identification information and an object identification information, the person identification information being included in the recognition result information acquired from the object recognition engine and the object identification information being included in the recognition result information acquired from the flow recognition engine, in a case that both the recognition result information are coincident with each other integrate by relating flow information of a predetermined object with object information and output as the new recognition result, the flow information being the recognition result information acquired from the flow recognition engine, and the object information being the recognition result information acquired from the object recognition engine.