TASK EXECUTION SYSTEM, TASK EXECUTION METHOD, AND TASK EXECUTION PROGRAM

A technique of executing a task related to a target object robustly against a change in a visual feature is provided. A task execution system includes: a database management unit configured to record in advance a contextual relationship database indicating a spatial contextual relationship of a plurality of objects including a target object; an imaging unit configured to acquire image data that is data obtained by adding, to an image, position information indicating a position at which the image is captured; an object detection unit configured to detect objects from the image; a segmentation unit configured to extract the objects from the image; a contextual relationship extraction unit configured to extract a spatial contextual relationship of the objects extracted from the image; and a task execution unit configured to execute a task related to the target object based on the contextual relationship of the objects extracted from the image and the contextual relationship recorded in the contextual relationship database.