Patent ID: 6362899
Filing Date: 2002-03-26
Classification: B41C,B44B,G05B,H04N

Abstract:
An image system for imaging engraved areas on workpieces comprising:an imager for imaging a plurality of engraved areas on a workpiece and for generating a pixel array corresponding thereto; and a processor coupled to said imager for using said pixel array to generate a calibration factor for use when determining actual measurements for engraved areas subsequently imaged by said imager; wherein said processor locates at least one pair of said engraved areas using said pixel array and generates said calibration factor corresponding thereto, said processor generating said calibration factor using a scaling variable and a known screen variable associated with said plurality of engraved areas; wherein said calibration factor comprises a ratio of said scaling variable and said known screen variable; wherein said known screen variable comprises a distance defined by a desired screen; and wherein said scaling variable comprises a number of pixels between engraved areas.