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:
Aug. 14, 2007
Filed:
Aug. 29, 2002
Tadayoshi Nakayama, Tokyo, JP;
Ken-ichi Ohta, Kanagawa, JP;
Hidefumi Osawa, Saitama, JP;
Shinichi Kato, Kanagawa, JP;
Naoki Ito, Tokyo, JP;
Tadayoshi Nakayama, Tokyo, JP;
Ken-Ichi Ohta, Kanagawa, JP;
Hidefumi Osawa, Saitama, JP;
Shinichi Kato, Kanagawa, JP;
Naoki Ito, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
From inputted multilevel image data it is generated, for each pixel, image area information constituted by an image area component indicating whether the pixel exists in a character•line drawing area or halftone area and an image area component indicating whether the pixel is chromatic or achromatic. The information is encoded by a lossless encoding unit on a block basis and stored, and an amount of code is monitored. When the amount of code exceeds a target amount, the lossless encoding unit performs encoding upon changing image area components, of subsequently input image area components, which coincide with a condition. The codes that have already been stored are temporarily decoded by a lossless code re-encoding unit, and the above image area components are changed. The resultant data is then re-encoded and stored.