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Wide dynamic range using monochromatic sensor

  • US 10,165,195 B2
  • Filed: 04/10/2017
  • Issued: 12/25/2018
  • Est. Priority Date: 07/26/2012
  • Status: Active Grant
First Claim
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1. A method for imaging in a light deficient environment comprising:

  • emitting four electromagnetic radiation pulses of three different wavelengths into a light deficient environment during a blanking period during frame capture of an image sensor, wherein the image sensor comprises a plurality of pixels, and wherein the image sensor comprises a monochromatic image sensor;

    capturing a plurality of frames in the light deficient environment using the image sensor, each one of the plurality of frames being radiated by one of the four electromagnetic radiation pulses of the three different wavelengths, wherein capturing at least one frame of the plurality frames comprises controlling a first subset of pixels during the at least one frame for a long exposure and controlling a second subset of pixels during the at least one frame for a short exposure, wherein the at least one frame for the long exposure and the at least one frame for the short exposure are two of the plurality of frames that are exposed to the same wavelength of electromagnetic radiation; and

    creating a single display frame from the plurality of frames.

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