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:
Oct. 24, 2006
Filed:
Mar. 21, 2003
Hidefumi Osawa, Saitama, JP;
Tadayoshi Nakayama, Tokyo, JP;
Ken-ichi Ohta, Kanagawa, JP;
Shinichi Kato, Kanagawa, JP;
Naoki Ito, Tokyo, JP;
Hidefumi Osawa, Saitama, JP;
Tadayoshi Nakayama, Tokyo, JP;
Ken-ichi Ohta, Kanagawa, JP;
Shinichi Kato, Kanagawa, JP;
Naoki Ito, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention allows an image to be coded within a target size without necessitating the image to be input again during the coding of the image, with a mode reflecting a user's intention for coding. To solve this problem, input image data is coded at coding unitand stored into first and second memories, respectively. Coding sequence unitmonitors the quantity of codes. When a set value is determined to be reached, coding sequence unitmakes data in first memory to be discarded and directs coding means to further increase a quantization step, and continues coding. As previous coded data is stored in second memory, the data is re-coded with the same quantization step as that of coding unitafter changing of a parameter at re-coding unit, and the re-coded data is stored into first and second memory. At this moment, coding unitand re-coding unitperform an operation and coding on quantization error according to a mode of quantization operation designated at mode designation unit