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. 12, 2021
Filed:
Jan. 29, 2020
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Akira Sano, Matsumoto, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 9/31 (2006.01); G01J 3/51 (2006.01); G01J 3/50 (2006.01); G06T 7/73 (2017.01);
U.S. Cl.
CPC ...
H04N 9/3185 (2013.01); G01J 3/506 (2013.01); G01J 3/51 (2013.01); G06T 7/73 (2017.01);
Abstract
A projection position detection device includes: a spectroscopic camera receiving light from an image pickup range including a projection image projected onto a projection target, and picking up a plurality of spectral images corresponding to different wavelengths from each other; a spectrum computation unit computing an optical spectrum of each pixel, based on the plurality of spectral images; a feature point detector detecting a feature point in the image pickup range, based on the optical spectrum of the pixel; and a projection position calculator calculating a relative position of the projection image to the feature point.