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:
Sep. 22, 1998
Filed:
Nov. 14, 1996
Julie Tsai-Hsin Dawe, Ft. Collins, CO (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A system for determining the type of graphical data within a scanned image. The system scans an image to obtain grayscale image data, and then performs a density slice operation on the grayscale image data, using a predetermined grayscale range, to produce binary image data. The system erodes the binary image data, and counts the number of black pixels remaining within the image data. If the count of the black pixels within the image exceeds a maximum acceptable pixel count, the area is considered to be continuous tone, such as a photograph, otherwise, the region is considered to be bi-tonal, such as line art or text. The system can also perform multiple density slices and erosions, using different grayscale ranges, OR the results, and then analyze the result of the OR operation to determine the type of image.