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. 30, 1980
Filed:
Dec. 18, 1978
Glen G Langdon, Jr, San Jose, CA (US);
Patrick E Mantey, Los Gatos, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and means for creating the display illusion of 'roughness' or 'texture' in color patterns suitable for an raster scanned display surface by assigning different color values to pels (picture elements) in adjacent positions and then replicating the patterns automatically using the recurrent and sequential accessing of a concordance table. The real color of each pel of a textured pattern is a joint function of a color number stored in a refresh buffer driving the display surface for any given display matrix array pel position and the value of a predetermined subset of address bits which describe that pel position. The use of preselected pel position address bits for regulating texture is shown as applied to video lookup tables and refresh buffers as a singlelevel control and additionally to two or more video lookup tables for achieving a pattern hierarchy.