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. 03, 2004
Filed:
Mar. 01, 2001
Mitsuji Waki, Hachioji, JP;
Tadashi Nishio, Iruma, JP;
Akihiro Kubota, Kokubunji, JP;
Masaki Higurashi, Hino, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
In an image calibration device a calibration pattern is projected onto a screen from each projector under control of a personal computer or other calibration device , pictures are taken by a digital camera or other image pick-up device and the results are supplied to the calibration device . The calibration device uses the supplied picture data to calculate parameters in order to perform picture positioning, color adjustment, brightness adjustment and other adjustments and corrections, and based on the calculation results transforms the original picture data, generates and supplies signals indicating projection conditions to each of the projectors and performs image calibration control of the pictures projected by each projector Here at the time of taking pictures, by installing on the image pick-up device a shielding member formed into a tetragonal pyramid shape, the light-receiving part of the image pick-up device and the screen are completely shielded from ambient external light. By this means, the measurement precision of the image pick-up device is improved, and accurate and reliable image calibration is performed.