Projection type 3D shape restoration device, projection type 3D shape restoration method, and projection type 3D shape restoration program

摘要

PROBLEM TO BE SOLVED: To restore an original three-dimensional shape from an image projected from a projector by using robust constraint conditions when a projector/camera system is used.SOLUTION: A projection type three-dimensional shape restoration device includes: shaded image generation means for generating a shaded image of an object, which is generated on the basis of a principle of an illuminance difference stereo from a three-dimensional shape of the object and direction information of illumination for illuminating the object for an image of the object which is to be projected by a projector; image output means for outputting the shaded image to the projector which projects the shaded image on a prescribed rectangular face; image input means for obtaining a captured image generated by allowing a camera to image the shaded image projected on the rectangular face; and three-dimensional shape restoration means which matrix-decomposes an image data matrix generated from the captured image into a temporary surface normal matrix and a temporary light source direction matrix, acquires a surface normal matrix by linearly transforming the temporary surface normal matrix by using a linearly transformed matrix and restores the three-dimensional shape of the object in response to the surface normal matrix.