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:
Jul. 14, 1998
Filed:
Mar. 04, 1996
David B Fujii, Boise, ID (US);
Robert A Rust, Boise, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A system converts a source image into destination image pixels that are binary. The system includes a memory which stores at least a portion of a row of source grey level pixels, and a corresponding row of a threshold matrix of plural rows of grey level pixel values, each row including at least W pixel values. A scale register stores N source grey level pixel values that have been scaled to match N grey level destination image pixel locations. A threshold register outputs, in parallel, up to N of the W threshold pixel values. Alignment logic controllably enters the threshold pixel values into the threshold register. A controller operates the alignment logic to enter the W threshold pixel values into N contiguous storage positions in the threshold register, and if W greater than N, enables entry of excess ones of the W threshold pixel values into contiguous storage positions in the threshold register after the (W-N) previously entered threshold pixel values have been outputted. A comparator compares the N source pixel values with corresponding ones of the N threshold pixel values and assigns N binary values to the destination image in accordance with the comparing action.