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:
Jan. 06, 2004
Filed:
Dec. 20, 1999
Nobuhiko Nakahara, Shizuoka-ken, JP;
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention provided an image processing method having the steps of, storing a plurality of multi-level dither threshold value arrangements employed for a multi-level dither process, discriminating a given first gradation image data expressing one pixel by a first bit number into an image field emphasizing a resolution and an image field emphasizing a gradation, selecting an optimum multi-level dither threshold value arrangement from a plurality of multi-level dither threshold value arrangements on the basis of a discrimination result by the discriminating step, and converting the gradation image data into a second gradation image data expressing one pixel by a second bit number less than the first bit number according to a multi-level dither process on the basis of the selected optimum multi-level dither threshold value arrangement. Accordingly, it is possible to perform a multi-level dither process which establish both of a resolution in a character/line image field and a gradation in a photo image field.