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Method and apparatus for cancelling lighting variations in object recognition

  • US 6,701,026 B1
  • Filed: 04/07/2000
  • Issued: 03/02/2004
  • Est. Priority Date: 01/26/2000
  • Status: Expired due to Fees
First Claim
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1. A method of cancelling lighting variations in a digital image of a specified class of objects, said method including the steps of:

  • estimating lighting parameters and reliability for each pixel of said digital image using a stochastic model of the specified object class;

    segmenting said digital image into regions having different lighting parameters;

    distinguishing object details in said digital image from shadows in said digital image;

    splitting and merging regions containing object details into nearest regions;

    estimating predetermined lighting-parameter characteristics for each split and merged region; and

    reconstructing said digital image based on said estimated lighting-parameter characteristics.

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