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:
Jun. 19, 2001
Filed:
Sep. 20, 1996
Shinichi Sunakawa, Asaka, JP;
Kazuhiro Matsubayashi, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image processing apparatus makes it possible to cut off a desired image with a high extraction rate irrespective of whether or not an inputted image has compression hysteresis. With the image processing method therefor, the inputted image data are at first divided into small blocks, and then, frequency transformation is executed. Further, small blocks are detected with respect to those containing character areas. Subsequently, detection is made as to whether or not any non-reversible compression is processed to the frequency transformed image data. In accordance with the result of such detection, data on a table are retrieved to obtain determination threshold values. On the basis of the determination threshold values thus retrieved, the small blocks containing characters are detected for separation.