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:
Feb. 20, 2001
Filed:
Apr. 06, 1998
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The object of the invention is to identify accurately which of the plurality of image types each pixel in a document image is included by a small circuit structure. When spacial filtering process is performed to the image signals of a photograph region and a letter region shown by use of a filter with a filter coefficient having a sum of −1 as shown, the image signals shown will be intensified, and by binary coding the same with a threshold “0”, an edge detection result could be gained, with no edge portion detected in the photograph region. Therefore, in the identification circuit of the image processing device, the identification on whether or not the observation pixel is included in the photograph region could be easily and accurately be performed based on whether or not the edge portion exists in the local block.