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:
Oct. 12, 1982
Filed:
Apr. 11, 1980
John O Ryan, Cupertino, CA (US);
Joseph L Corkery, San Carlos, CA (US);
Ampex Corporation, Redwood City, CA (US);
Abstract
Data for providing spatial and shading error correction signals during the operating mode of a television camera, are taken from a two dimensional array of correction points distributed across a television image during the camera setup mode and are stored as 8 bit words. The error correction signals extend smoothly (linearly) between the correction points. The smoothing is performed by selectively interpolating selected reference points on each video line to provide values which vary smoothly from one row of correction points to the next. A vertical interpolation circuit performs a vertical interpolation on a line-by-line basis, by adding signals produced by a multiplying D/A converter when loaded with the two values to be interpolated and weighted by factors related to the distance from each correction point. The results of the vertical interpolation circuit are fed to a horizontal interpolation circuit which ramps linearly from one reference point to the next, to provide the spatial and shading error correction output signals.