Resources Contact Us Home
Method for calibrating a color printer using a scanner for color measurements

Image Number 5 for United States Patent #5537516.

The present invention is a method for calibrating color reproduction devices such as printers and for stabilizing the print colors generated by a computer controlled color reproduction device. Further, the present invention acts to standardize the print colors produced across a family or series of color reproduction devices. It may be incorporated into a color management system used to produce consistent colors across a variety of reproduction devices. In the first embodiment of the present invention, an object scanning device and an object color reproduction device are used. In the second embodiment, an object densitometer is used as the measuring device to measure densities. In yet another embodiment, an object colorimeter is used as the measuring device to measure CIE values. The present invention enables generation of a set of calibration curves for correcting the color output of the color reproduction device. The calibration curves provide modification functions for each of the individual color print channels of the color reproduction device (e.g., CMYK). The calibration curves are used to alter the rendering of color reproductions, and thereby achieve a desired result. The calibration curves may be downloaded to a color management system to alter the rendering of color images, pages, documents, etc., and thereby achieve a desired result. The calibration curves may also be downloaded directly to the controller of the color reproduction device. The present invention further provides an improved method of measuring ink values using a subject scanner by defocusing or diffusing a target.

  Recently Added Patents
Method and system for security authentication of radio frequency identification
Canopy light fixture
Regulating a supply voltage provided to a load circuit
Methods and apparatus for power amplifier calibration
Use of a high-oleic and high-tocol diet in combination with a non-tocol antioxidant for improving animal meat quality
SRAM cells using shared gate electrode configuration
Adapter plate for use in mounting an audio/visual device or the like to a surface
  Randomly Featured Patents
Position detection apparatus and exposure apparatus
Solid state laser device using a selected crystal orientation in non-polar or semi-polar GaN containing materials and methods
Image forming apparatus
Sealing arrangement for a medium-containing chamber of a dual belt press
Robust index storage for non-volatile memory
Method for novel SOI DRAM BICMOS NPN
Semiconductor device with reduced resistance of bit lines and method for manufacturing the same
Device for generating multiple spreading sequences in reverse high speed data channels
Handoff method between heterogeneous networks and system thereof
Apparatus for measuring and orienting logs for sawing