Provided is a system which can detect a geometric inconsistency in a mixed reality system. The present invention provides an inconsistency detection system in a mixed reality system comprising a portable display device which has a see-through display unit and a photography unit which photographs real space, where a virtual object is rendered in the display unit and a user views same within a prescribed real space. The mixed reality system comprises: a means which stores three-dimensional spatial data; a means which determines a user environment; and a means which renders the virtual object in the display unit on the basis of the user environment. First point group data is generated from a composite image which is obtained by displaying the virtual object in superimposed over a naked-eye visual field image; second point group data is generated using point group data of the virtual object and point group data of the three-dimensional space in the determined user environment; and an inconsistency is detected on the basis of the result of a comparison between the first point group data and the second point group data.
INCONSISTENCY DETECTION SYSTEM, MIXED REALITY SYSTEM, PROGRAM, AND INCONSISTENCY DETECTION METHOD