IMAGE MEASUREMENT METHOD, IMAGE MEASUREMENT APPARATUS, AND IMAGE MEASUREMENT PROGRAM STORAGE MEDIUM

PROBLEM TO BE SOLVED: To provide a technique for measuring the three-dimensional geometrical information of a plane and the positional information of a point, etc. from an optical flow pattern or a stereographic image. SOLUTION: When defining p0, p1as the respective positions of an arbitrary point at two different times in a space appeared in an image, when the inside of the space is viewed from a predetermined observation point, and when pinfas the position of the point after the lapse of an infinite time, and pcas the position of the point at the time, when the plane including the point is overlaid on the observation point, the time at which the direction of the plane and the plane is overlaid on the observation point is obtained, by using a cross-ratio äpinfp0p1pc} determined by the four points, pinf, p0, p1and pc. COPYRIGHT: (C)2007,JPO&INPIT