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. 31, 1998
Filed:
Aug. 31, 1995
Richard W Bunce, Boise, ID (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A method for partial pixel encoding and decoding of an extended resolution halftone image. The image is represented by a plurality of pixels and each pixel contains a number of sub-pixels. First, a group of pixels from the plurality of pixels is defined. The group of pixels is consolidated so that at most one pixel (i.e., a partial pixel) in the group has a sub-set of the plurality of sub-pixels set. Those fully-on or fully-off pixels in the group are stored in a bitmap. The corresponding bit in the bitmap is set if the partial pixel has more than half of its sub-pixels set otherwise it is reset. Next, the position of the partial pixel is stored in memory. Finally, an indicator is stored in memory, where the indicator in combination with the corresponding bit describe how many of the sub-pixels in the partial pixel are set. Decoding is performed in the reverse order.