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. 24, 1998
Filed:
May. 01, 1995
Keita Kimura, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An image reading device comprises a line sensor that moves in an auxiliary scanning direction, a resolution setting device which sets the resolution of the line sensor in the auxiliary scanning direction, an exposure correction value setting device that sets an exposure correction value when the image is read, and a control device that performs exposure correction by multiplying the moving velocity of the line sensor and the accumulation time of the line sensor by correction factors. To correct the base concentration while reducing the effects of deterioration of the S/N ratio and level-skipping, a rough adjustment of the exposure is conducted by a gain circuit, a fine adjustment is conducted with reference to a first look-up table, and a further fine adjustment of the original document base concentration is conducted with reference to a second look-up table.