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:
Oct. 10, 2017
Filed:
Aug. 12, 2014
Shinichi Sumiyoshi, Kanagawa, JP;
Shinichi Sumiyoshi, Kanagawa, JP;
RICOH COMPANY, LIMITED, Tokyo, JP;
Abstract
A projection control unit performs control such that a first pattern image in which first feature points are arranged is caused to be projected on a projection surface, and a second pattern image including second feature points corresponding to the first feature points is caused to be projected on a planar projection surface. An acquisition unit acquires, from a photographing unit, a first photographed image of the projected first pattern image and a second photographed image of the second pattern image. An extraction unit extracts second connected components in which the second feature points are connected in a predetermined direction and first connected components in which the first feature points are connected. A shift amount calculation unit calculates shift amounts of the first connected components with respect to the second connected components. A first calculation unit calculates correction information for correcting a projection target image based on the shift amounts.