Browse Prior Art Database

CALIBRATION STRIP DIAGNOSTICS

IP.com Disclosure Number: IPCOM000025018D
Original Publication Date: 1983-Apr-30
Included in the Prior Art Database: 2004-Apr-04

Publishing Venue

Xerox Disclosure Journal

Abstract

During calibration of a charge coupled device (CCD), location of failed CCD photosites is recorded automatically. In particular, a known illumination level is reflected to the CCD for calibration. The resulting electrical video signal from the CCD is adjusted to a set level for each photosite location. A failure of the calibration strip (dirt or a scratch) would result in a false indication of a failed CCD.