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Method of determining display characteristic function

  • US 5,926,617 A
  • Filed: 05/14/1997
  • Issued: 07/20/1999
  • Est. Priority Date: 05/16/1996
  • Status: Expired due to Term
First Claim
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1. A method of determining a display characteristic function of a display, the method comprising the steps of:

  • initially setting at least one assumption on a display characteristic function of a display, the display characteristic function being indicative of a relationship between an input level of image data to be inputted to the display and relative brightness of an image to be displayed on the display by the image data;

    controlling the display to display at least one test image based on the set at least one assumption, each of the at least one test image including a plurality of first gradation patterns and a plurality of second gradation patterns, brightness of each first gradation pattern changing from a predetermined first value to a predetermined second value in one direction in a manner determined by a corresponding assumption, brightness of each second gradation pattern changing from the predetermined first value to the predetermined second value in a reverse direction in the manner determined by a corresponding assumption, the first and second gradation patterns being arranged alternately in the test image so that portions of a second brightness in the first gradation patterns are arranged adjacent to portions of a first brightness in the second gradation patterns;

    selecting one test image whose brightness appears uniform; and

    determining the display characteristic function of the display based on the assumption that provides the selected test image.

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