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:
Feb. 25, 2014
Filed:
Mar. 13, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Toshinori Ando, Inagi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Pattern lights A and B of which patterns respectively having bright and dark sections have been in an inverted relation are projected on a subject to calculate luminance distributions Land Lof the subject and average values Ave(L) and Ave(L) of the distributions. A luminance distribution obtained by multiplying a luminance distribution Lof the subject of only a natural light component by a coefficient η is subtracted from the luminance distribution Lobtained by projecting the pattern light B on the subject and a correction value Lthereof is calculated so that a difference e of the average values become zero. Then, an intersection point of the luminance distribution Lobtained by projecting the pattern light A on the subject and the correction value Lof the luminance distribution Lobtained by projecting the pattern light B on the subject is derived.