ESTIMATION SYSTEM, ESTIMATION METHOD, AND ESTIMATION PROGRAM

There is provided an estimation system for estimating a position and a posture of a fitting harness, which includes a plurality of marks, which a user wears, and in which the user watches a video image, within a predetermined space. The estimation system stores preset posture data of a case in which the fitting harness is present in each of a plurality of regions different from each other included in the predetermined space, for each of the regions; receives a captured image of the predetermined space in which the fitting harness is included; receives posture information indicating the posture of the fitting harness from the fitting harness; and estimates a region having a possibility that the fitting harness is present among the plurality of regions using the captured image and the preset posture data, and estimates the region by narrowing the preset posture data to be used for a second captured image from the position and the posture in a first captured image based on posture information received after the first captured image is received, when the position and the posture of the fitting harness are estimated based on the second captured image following the first captured image among the sequentially transmitted captured images.