Patent ID: 7760242

Claim:
An information processing method comprising: acquiring a first image of an index arranged in a physical space, wherein the first image is captured by a first image capturing unit having a known position and orientation in a first coordinate system, and a position or a position and orientation of the index is unknown; calculating arrangement information indicating a position or a position and orientation of the index in the first coordinate system, the arrangement information being calculated based on the first image and the known position and orientation of the first image capturing unit; capturing a second image of the index in the physical space using a second image capturing unit, wherein the second image capturing unit is movable, a positional relationship between the second image capturing unit and the first image capturing unit is unfixed, and the position and/or orientation of the second image capturing unit is unknown; detecting an image coordinate of the index from the second image in a second coordinate system; and calculating the position and/or orientation of a viewpoint of the second image by associating the image coordinate of the index in the second coordinate system with the arrangement information indicating the position or position and orientation of the index in the first coordinate system.