Patent ID: 8445830
Filing Date: 2013-05-21
Classification: H04N

Abstract:
1. A correction information calculating device comprising: a position information acquiring unit that acquires position information, which is input by a user, as information representing a position corresponding to a first diagram located inside a first photographed image acquired by photographing the first diagram on a projection surface when a first measurement image including the first diagram is projected onto the projection surface from a projector; a second diagram position detecting unit that detects a position of a second diagram inside a second photographed image acquired by photographing the second diagram on the projection surface by using a detection result at a time of detecting a position of the first diagram inside the first photographed image with a position represented by the position information used as a reference and a positional relationship of a position of the second diagram on original data of a second measurement image with respect to the position of the first diagram on original data of the first measurement image when the second measurement image including the second diagram that is different from the first diagram in at least one of a shape and a size is projected onto the projection surface from the projector; and a correction information calculating unit that calculates correction information representing a correspondence relationship between a position of a pixel on the projection surface and a position of a pixel of an image forming element of the projector by comparing the position of the second diagram inside the second photographed image that is detected by the second diagram position detecting unit and the position of the second diagram on the original data of the second measurement image.