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. 25, 2015
Filed:
Aug. 23, 2012
Toru Iwanami, Kanagawa, JP;
Tomohisa Suzuki, Kanagawa, JP;
Makoto Hamatsu, Kanagawa, JP;
Wenxiang GE, Kanagawa, JP;
Kenjo Nagata, Kanagawa, JP;
Hidefumi Tanaka, Kanagawa, JP;
Toru Iwanami, Kanagawa, JP;
Tomohisa Suzuki, Kanagawa, JP;
Makoto Hamatsu, Kanagawa, JP;
Wenxiang Ge, Kanagawa, JP;
Kenjo Nagata, Kanagawa, JP;
Hidefumi Tanaka, Kanagawa, JP;
FUJI XEROX CO., LTD., Tokyo, JP;
Abstract
A density detection apparatus includes the following elements. An image forming unit forms density detection images having different area ratios. A measuring unit measures an amount of reflected light. A storage unit stores reference values and also stores a representative value thereof. A determining unit determines a threshold for the area ratios of the density detection images on the basis of a variation among the reference values. A density obtaining unit obtains, for a density detection image having an area ratio which exceeds the threshold, a density level by using the amount of light reflected by the density detection image and the representative value, and obtains, for a density detection image having an area ratio which is equal to or smaller than the threshold, a density level by using the amount of light reflected by the density detection image, the associated reference value, and the representative value.