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:
Mar. 19, 1996
Filed:
May. 18, 1994
Midori Aida, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A color image input apparatus or scanner which has three color input devices which input three color images and then convert color image optical signals to analog electric signals. Three analog/digital convertors convert the analog signals to digital signals and three shading correction devices execute shading correction for the signals. Line correction devices execute line delays for the signals and then correct color difference of the three colors in the sub-scanning direction. There are three color dot or pixel correction devices which shift the position of each dot of each color within .+-.1 dot in the main scanning direction; that is each position of re-sampling or correction in the main scanning direction determines data values or correction information from correction coefficients of each position of the re-sampling. Three color output devices which output three color images. The color image apparatus can correct the color image difference in the main scanning direction.