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. 07, 2002
Filed:
Apr. 23, 1996
Takashi Honda, Toyokawa, JP;
Yoko Fujiwara, Tokyo, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
This invention causes an image which has been read out by a CCD sensor during a first scan to be converted into an electric signal corresponding to the density of the image. A CPU forms by calculation a graph of the magnitude of density and the frequency thereof, namely a density histogram based on the electric signal obtained by the conversion. The contrast of the image is calculated, based on the density of the blank base part and that of the image formed part of the image which are calculated from the density histogram. The CPU sets the adjustment width based on this contrast and calculates the luminous energy of a lamp being used during a main scan in accordance with the adjustment width so set and the value of density set by a setting key. Thus, the present invention infallibly allows perfect density adjustment in an image of any degree of contrast.