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Method and system for video processing to remove noise from a digital video sequence containing a modulated light signal

  • US 9,888,203 B2
  • Filed: 04/07/2016
  • Issued: 02/06/2018
  • Est. Priority Date: 07/26/2011
  • Status: Active Grant
First Claim
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1. A method comprising:

  • electronically receiving, by an image sensor of a device, a still image of a scene, wherein;

    the scene comprises both modulated illumination emitted by a beacon light source and un-modulated illumination; and

    the still image comprises a plurality of pixel values, each of the plurality of pixel values being for a given point in the still image;

    calculating noise from the still image, wherein the noise comprises information within the still image corresponding to the un-modulated illumination of the scene;

    removing the calculated noise from the still image to obtain an isolated digital image of the modulated illumination of the scene; and

    demodulating the emitted light signal from the isolated digital image.

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