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:
Dec. 12, 2006
Filed:
Oct. 01, 2002
Takatoshi Ota, Kanagawa, JP;
Takatoshi Ota, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image processing apparatus having general versatility, for flexible quantization on multivalue image data of two or more colors to image data having a reduced number of bits in correspondence with the number of bits to be quantized, by using an error diffusion scheme. When two color multivalue data are inputted, errors distributed to the position are added to the data and inputted as I'and I′into an output determination unit. The input data I′and I′are quantized by using LUTs-and-into numerical values of less-value representation. The two data from the LUTs-and-are inputted into an LUTas coordinate values in a two-dimensional coordinate system, and two color binarized bit data (total 2 bits) are outputted.