PROBLEM TO BE SOLVED: To provide a system which can detect a geometric inconsistency in a mixed reality system.;SOLUTION: The inconsistency detection system in a mixed reality system comprises a portable display device which has a see-through display unit and a photography unit which photographs a real space, where a virtual object is rendered on the display unit and a user views the same within a prescribed real space. The mixed reality system comprises: means to store three-dimensional spatial data; means to determine a user environment; and means to render the virtual object on 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 superimposed on 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 a result of a comparison between the first point group data and the second point group data.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT
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