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:
May. 25, 2010
Filed:
Apr. 09, 2007
Tsutomu Takayama, Kanagawa, JP;
Mitsugu Hanabusa, Tokyo, JP;
Atsuko Kashiwazaki, Kanagawa, JP;
Kengo Kinumura, Kanagawa, JP;
Tsutomu Takayama, Kanagawa, JP;
Mitsugu Hanabusa, Tokyo, JP;
Atsuko Kashiwazaki, Kanagawa, JP;
Kengo Kinumura, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Upon processing a visible light image signal and infrared image signal respectively obtained by illuminating a transparent document with light beams coming from a visible light lamp for mainly emitting visible light and an infrared lamp for mainly emitting infrared light, and photoelectrically converting optical images of the transparent document, a histogram is generated on the basis of the infrared image signal, a threshold value is calculated based on the histogram, and infrared image signal components equal to or smaller than the threshold value are extracted by comparing the calculated threshold value and infrared image signal components. Visible light image signal components corresponding to the extracted infrared image signal components are interpolated using surrounding visible light image signal components.