Tone mapping for low-light video frame enhancement
First Claim
Patent Images
1. An image acquisition and processing device, comprising:
- an image acquisition unit configured to;
acquire a plurality of sharp images of a scene; and
acquire a blurred image nominally of the same scene;
an image combining unit configured to;
generate a first combined image based, at least in part, on a first sharp image, from the plurality of sharp images, and color information of the blurred image; and
generate a second combined image based, at least in part, on a second sharp image, from the plurality of sharp images, and the first combined image;
wherein the first sharp image is different than the second sharp image; and
an image display unit configured to;
display the second combined image.
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Abstract
A technique is provided for generating sharp, well-exposed, color images from low-light images. A series of under-exposed images is acquired. A mean image is computed and a sum image is generated each based on the series of under-exposed images. Chrominance variables of pixels of the mean image are mapped to chrominance variables of pixels of the sum image. Chrominance values of pixels within the series of under-exposed images are replaced with chrominance values of the sum image. A set of sharp, well-exposed, color images is generated based on the series of under-exposed images with replaced chrominance values.
50 Citations
20 Claims
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1. An image acquisition and processing device, comprising:
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an image acquisition unit configured to; acquire a plurality of sharp images of a scene; and acquire a blurred image nominally of the same scene; an image combining unit configured to; generate a first combined image based, at least in part, on a first sharp image, from the plurality of sharp images, and color information of the blurred image; and generate a second combined image based, at least in part, on a second sharp image, from the plurality of sharp images, and the first combined image; wherein the first sharp image is different than the second sharp image; and an image display unit configured to; display the second combined image. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An image processing method comprising:
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acquiring a plurality of sharp images of a scene; acquiring a blurred image nominally of the same scene; generating a first combined image based, at least in part, on a first sharp image, from the plurality of sharp images, and color information of the blurred image; generating a second combined image based, at least in part, on a second sharp image, from the plurality of sharp images, and the first combined image; wherein the first sharp image is different than the second sharp image; and displaying the second combined image; wherein the method is performed using one or more computing devices. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer-readable storage medium storing one or more instructions which, when performed by one or more processors, cause the processors to perform:
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acquiring a plurality of sharp images of a scene; acquiring a blurred image nominally of the same scene; generating a first combined image based, at least in part, on a first sharp image, from the plurality of sharp images, and color information of the blurred image; generating a second combined image based, at least in part, on a second sharp image, from the plurality of sharp images, and the first combined image; wherein the first sharp image is different than the second sharp image; and displaying the second combined image. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification