The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 2017
Filed:
Nov. 24, 2015
Yasuhiro Ono, Kanagawa, JP;
Yasuhiro Ono, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
An optical positional information detection apparatus for detecting a position indicated by a pointer on a display surface. The optical positional information detection apparatus includes an imaging unit that captures an image of one or more pointers situated within a predetermined distance from the display surface; an image obtaining unit that obtains a first image captured by the imaging unit and a second image captured by the imaging unit; a movement distance calculation unit that uses a first feature amount based on the first image in which first pointers are captured and a second feature amount based on the second image in which second pointers are captured so that the movement distance calculation unit calculates a movement distance from the first pointers to the second pointers; and an association unit that associates the second pointers with the first pointers based on a limitation on the movement distance.