Patent ID: 8866902
Filing Date: 2014-10-21
Classification: G03B,H04N

Abstract:
1. A correction information calculating device that calculates correction information representing correspondence relationship between a position of a pixel in an image projected onto a projection surface by projectors including an image forming element and a position of a pixel of the image forming element, the correction information calculating device comprising: a supply unit that supplies first measurement image data representing a first measurement pattern including a plurality of characteristic diagrams that define characteristic points to a first projector that projects an image onto a first projection area on the projection surface and supplies second measurement image data representing a second measurement pattern including a plurality of characteristic diagrams that define characteristic points to a second projector that projects an image onto a second projection area including an overlapping area overlapping the first projection area; and a calculation unit that calculates the correction information by comparing positions of the plurality of characteristic points in a photographed pattern acquired by photographing the first and second measurement patterns projected onto a projection surface by the first and second projectors based on the first and second measurement image data and positions of the plurality of characteristic points defined in the first and second measurement image data, wherein, when an arrangement direction of pixels of the first and second measurement patterns corresponding to an alignment direction of the first projection area and the second projection area is set as a first arrangement direction, and a direction intersecting the first arrangement direction is set as a second arrangement direction, the first and second measurement patterns include characteristic diagram columns configured by two or more of the characteristic diagrams arranged on the end located on a side overlapping another measurement pattern in the first arrangement direction out of the plurality of characteristic diagrams, and wherein positions in the second arrangement direction of the characteristic diagrams belonging to the characteristic diagram column defined in the first measurement image data are different from positions in the second arrangement direction of the characteristic diagrams belonging to the characteristic diagram column defined in the second measurement image data, wherein positions of the characteristic points of the first measurement pattern are shifted as compared to positions of the characteristic points of the second measurement pattern, and wherein the first and the second measurement patterns are projected and photographed at a same time.