Patent Document ID: 4819169
Application ID: 07100581
Patent Status: 1

Claim One:
1. A system for calculating movement direction and position of a movable object, comprising: (a) first means for photographing a background of the movable object in a direction of which the movable object moves; (b) second means for detecting a vanishing point from a photographed background two-dimensional image derived by the first means; (c) third means for detecting a position of an end of a passage on which the movable object is to move from the photographed background image derived by the first means; (d) fourth means for calculating a direction of the movable object from a position of the vanishing point detected by the second means; and (e) fifth means for calculating a distance of the movable object from the position of the passage end detected by the third means on the basis of the detected position of the passage end and vanishing point.