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Method and apparatus for acquiring luminance information and for evaluating the quality of a display device image

  • US 6,885,369 B2
  • Filed: 02/13/2002
  • Issued: 04/26/2005
  • Est. Priority Date: 02/23/2001
  • Status: Expired due to Fees
First Claim
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1. A method of acquiring luminance information of a display device, comprising the steps of:

  • subdividing an image displayed on said display device into a plurality of pixels;

    determining luminance values of pixels surrounding a predetermined pixel at selected positions of said divided image, said pixels surrounding said predetermined pixel forming a pixel group and adding said luminance values of said pixels forming said pixel group; and

    determining the luminance value of said predetermined pixel, and subtracting said luminance value of said predetermined pixel from the respective luminance values of said pixels forming said pixel group, said difference determining a luminance gradient and a measurement of a local luminance unevenness on said divided image.

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