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. 05, 1996
Filed:
Jul. 22, 1994
Gavin S Miller, Palo Alto, CA (US);
Apple Computer Inc., Cupertino, CA (US);
Abstract
A system for bit-masked color signal scaling comprises a processing unit, a display device, and a memory wherein a scaling unit, an image memory, a multiplication image memory, an approximation image memory, an approximation multiplication image memory, and a scaled image memory reside. The scaling unit retrieves a color signal having a red channel signal, a green channel signal, and a blue channel signal from the image memory, and performs either an exact or an approximate bit-masked color signal scaling. A method for exact bit-masked color signal scaling comprises the steps of: generating a staggered masking signal; generating a center masking signal; generating a staggered result signal; generating a center result signal; and adding the staggered result signal and the center result signal to produce a scaled color signal. A method for approximate bit-masked color signal scaling comprises the steps of: generating an approximation masking signal; generating an approximation color signal; generating an approximation multiplication signal; and multiplying the approximation color signal and the approximation multiplication signal to produce an approximate scaled color signal.