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. 28, 2014
Filed:
Sep. 06, 2010
Applicants:
Yuuji Kasuya, Kanagawa, JP;
Tadashi Araki, Kanagawa, JP;
Keiji Ohmura, Kanagawa, JP;
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/14 (2006.01); H04N 9/31 (2006.01); G06T 7/00 (2006.01); G03B 17/54 (2006.01); G03B 21/26 (2006.01);
U.S. Cl.
CPC ...
G03B 21/26 (2013.01); H04N 9/3185 (2013.01); G06T 7/0044 (2013.01); G06T 2207/30204 (2013.01); G03B 17/54 (2013.01); G03B 21/14 (2013.01); G06T 2207/10016 (2013.01); G03B 21/147 (2013.01); H04N 9/3194 (2013.01);
Abstract
A projection image area detecting device includes a projection image area detecting unit configured to detect marker image areas in a photographed image that is obtained by photographing a projection image area including a projection image. The marker image areas include marker images that are used for identifying four corners of the projection image area. The projection image area detecting unit detects the marker image areas by identifying a color included in the marker image areas that continues to change as time passes.