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Photometric measurement apparatus

  • US 5,818,977 A
  • Filed: 03/13/1996
  • Issued: 10/06/1998
  • Est. Priority Date: 03/12/1996
  • Status: Expired due to Fees
First Claim
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1. A photometric measurement apparatus, comprising:

  • a) a digital video camera for generating digital data representing the image of a scene of interest;

    b) means for stepwise changing the exposure duration of the camera;

    c) means for controlling said camera to create automatically a series of digital images of the same scene over a range of different exposures;

    d) means for storing the digital images;

    e) means for assembling data from said series of digital images at each picture element of interest to create a single composite digital image containing data from at least some of said digital images and representing at each picture element an intensity dynamic range greater than that obtainable from any single image;

    f) means for storing said assembled data representing said composite digital image; and

    g) means for producing a compressive transformation of the assembled data forming said composite image to generate a display image of the original scene, each point in the display image being correlated with a corresponding point in the composite image.

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