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:
May. 08, 2001
Filed:
Aug. 18, 1998
Hakan Ancin, Sunnyvale, CA (US);
Anoop K. Bhattacharjya, Sunnyvale, CA (US);
Seiko Epson Corporation, Tokyo, JP;
Abstract
A scanner (,) of a photocopier system scans a document and generates output image signals that an image-processing circuit (,) processes in such a manner as to enhance text-region legibility, and a laser printer (,) generates the output copy in accordance with the resultant image. The image-processing circuitry (,) identifies dark, low-saturation pixels in the input image whose gradients are low but that border high-gradient pixels, and it sets these pixels to the blackest values, thus emphasizing text edges. With the remaining pixels, it reduces bright-region contrast, and this tends to suppress the visibility of text that has “bled through” from the document's reverse side or from documents disposed behind it.