System and method to increase effective dynamic range of image sensors

  • US 20020176010A1
  • Filed: 03/15/2002
  • Published: 11/28/2002
  • Est. Priority Date: 03/16/2001
  • Status: Active Grant
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First Claim
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1. A method of effectively increasing the dynamic range of an image sensor, the method comprising:

  • capturing multiple images of a scene taken at different exposures;

    searching a selected image of the multiple images for overexposed and underexposed portions based on a pixel value indicative of luminance;

    analyzing portions in other images of the multiple images taken at lower exposures corresponding spatially to the overexposed portions in the selected image;

    analyzing portions in other images of the multiple images taken at higher exposures corresponding spatially to the underexposed portions in the selected image; and

    processing at least one of the analyzed portions with a machine vision application.

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