Patents Assigned to Internatiaonal Business Machines Corporation
  • Gray scale calibration tool for setting the density of a printer
    Patent number: 6268932
    Abstract: Density calibration for a printer is achieved using a standard grey scale vignette master and a stored gray scale vignette image that the printer operator can invoke from the operator panel of a printer. The vignette image provides a pre-calibrated scale that is used in conjunction with the □standard□ image to determine the proper optical density. The density is then set by the printer control panel based upon the value obtained by visually matching the two grey scale vignettes.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: July 31, 2001
    Assignee: Internatiaonal Business Machines Corporation
    Inventors: Ho Chong Lee, Larry David Teklits, Jack Louis Zable