Wide dynamic range using monochromatic sensor
First Claim
Patent Images
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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Abstract
The disclosure extends to methods, systems, and computer program products for widening dynamic range within an image in a light deficient environment.
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Citations
36 Claims
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1. A method for imaging in a light deficient environment comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for digital imaging in a light deficient environment:
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an emitter for providing illumination using electromagnetic pulses of a plurality of different wavelengths; a monochromatic image sensor comprising a plurality of pixels that are sensitive to the electromagnetic pulses; and a controller that causes the system to; emit four electromagnetic radiation pulses of three different wavelengths into a light deficient environment during a blanking period during frame capture of the image sensor; capture 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 pulses of the three different wavelengths, wherein capturing at least one frame of the repeating 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 create a single display frame from the plurality of frames. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. Non-transitory computer readable storage media storing instructions that, when executed by one or more processors, cause the one or more processors to:
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emit 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; capture 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 repeating 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 create a single display frame from the plurality of frames. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification