MARKER RECOGNITION TECHNIQUE USING GEOMETRIC INFORMATION, IMAGE FEATURE POINT, PATTERN MATCHING TECHNIQUE AND TOPOLOGY INFORMATION TOGETHER IN RECOGNITION OF MARKER IN COMPUTER INPUT IMAGE

摘要

PPROBLEM TO BE SOLVED: To reduce calculation costs required for distinguishing between markers having the same topology information, position estimation in a three-dimensional space and marker detection by using a marker recognition technique using existent topology information, in marker recognition in a computer input image, together with a marker recognition technique using an existent pattern matching technique, a technique using feature points of the image, and the like. PSOLUTION: The present invention performs: a marker candidate region detection step ST01 dependent upon topology information; a marker candidate narrowing-down step ST02 dependent upon topology information; a marker detection step ST03 dependent upon topology information; a marker detection step ST04 dependent upon geometrical information; a marker detection step ST05 dependent upon pattern matching; a marker detection step ST06 dependent upon feature points; and a marker information extraction step ST07. PCOPYRIGHT: (C)2011,JPO&INPIT