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:
Mar. 12, 2002
Filed:
Feb. 23, 1999
Applicant:
Inventors:
Douglas G. Keithley, Boise, ID (US);
Brent D. Rasmussen, Meridian, ID (US);
Assignee:
Hewlett-Packard Co., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/32 ;
U.S. Cl.
CPC ...
G06K 9/32 ;
Abstract
A method of sending a facsimile of a document includes diffusing a grayscale image to produce a binary, black-and-white image having on/off image values corresponding to a first spatial resolution. When communicating with a remote facsimile device that supports a lower resolution, the black-and-white image is converted to a lower resolution. To perform this conversion, a scaled value for each image value of the lower-resolution image is calculated by interpolating between neighboring dots of the original black-and-white image. The resulting scaled values are then error diffused to create a black-and-white image.