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System and Method for Estimating an Ambient Light Condition Using an Image Sensor

  • US 20150264241A1
  • Filed: 03/12/2014
  • Published: 09/17/2015
  • Est. Priority Date: 03/12/2014
  • Status: Active Grant
First Claim
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1. A computer-implemented method of calculating an ambient light estimate using an image sensor in a camera of a device, the method comprising:

  • obtaining an array of pixels using the image sensor;

    defining a matrix of grid elements, each grid element comprised of multiple adjacent pixels of the array of pixels;

    generating a first measurement value for a grid element of the matrix of grid elements based on the pixels associated with a respective grid element;

    identifying a set of grid elements having a first measurement value that satisfies a brightness criteria;

    calculating a weighted measurement value using the identified set of grid elements; and

    calculating the ambient light estimate based on the weighted measurement value and the first measurement value.

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