SYSTEM, METHOD, AND PROGRAM FOR MEASURING DISTANCE BETWEEN SPHERICAL OBJECTS

To perform inter-spherical-object distance measurement. A system for inter-spherical-object distance measurement is provided. This system comprises a movable image capturing means having an optical axis; a sensing means for providing an output depending on a tilt of the optical axis; a first determination means for determining whether an image of a spherical object having a predetermined size is captured at a predetermined position in an output image from the image capturing means; a second determination means for, using the output from the sensing means, determining whether a plane perpendicular to the optical axis is horizontal; and a means for automatically storing an output image from the image capturing means as a specified image when: it is determined that an image of a spherical object having the predetermined size is captured at the predetermined position in the output image; and it is determined that a plane perpendicular to the optical axis is horizontal.