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Dual exposure for image sensor

  • US 20060192873A1
  • Filed: 01/31/2006
  • Published: 08/31/2006
  • Est. Priority Date: 02/01/2005
  • Status: Active Grant
First Claim
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1. A method of capturing an image of a scene using an image capture device having an array of pixels arranged into a plurality of rows, the method comprising:

  • for a first duration, capturing a first portion of the scene with a first plurality of the rows;

    for a second duration that is longer than the first duration, capturing a second portion of the scene with a second plurality of the rows;

    for each pixel in the first plurality of the rows;

    determining whether a pixel value associated with the pixel is below a first predetermined threshold;

    based on the determination;

    if the pixel value is above the first predetermined threshold;

    creating a scaled-up pixel value by increasing the pixel value by a scale factor;

    using the scaled-up pixel for a final pixel value; and

    if the pixel value is below the first predetermined threshold, using an interpolated pixel value for the final pixel value; and

    storing the final pixel value as part of the captured image;

    for each pixel in the second plurality of the rows;

    determining whether a pixel value associated with the pixel is above a second predetermined threshold;

    based on the determination;

    if the pixel value is below the second predetermined threshold, using the pixel value for a final pixel value; and

    if the pixel value is above the second predetermined threshold, using an interpolated pixel value for the final pixel value; and

    storing the final pixel value as part of the captured image; and

    displaying at least a portion of the captured image.

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