Tone Mapping For Low-Light Video Frame Enhancement
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Accused Products
Abstract
A technique is provided for generating sharp, well-exposed, color images front 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.
28 Citations
46 Claims
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1-20. -20. (canceled)
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21. An image processing method, comprising:
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acquiring a first well-exposed image frame of a scene; acquiring additional image frames of the same scene; wherein the additional image frames include a second image frame and a third image frame; generating one or more combined images based on the well-exposed image frame of the scene and at least one of the additional image frames; determining a frame-to-frame motion between the second image frame and the third image frame; and responsive to said frame-to-frame motion exceeding a threshold, acquiring a second well-exposed image frame of the scene. - View Dependent Claims (22, 23, 25, 26, 27, 28, 29, 30)
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24. (canceled)
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31. An image acquisition and processing device, comprising:
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an image acquisition unit configured to; acquiring a first well-exposed image frame of a scene; acquiring additional image frames of the same scene; wherein the additional image frames include a second image frame and a third image frame; an image combining unit configured to; generating one or more combined images based on the well-exposed image frame of the scene and at least one of the additional image frames; determining a frame-to-frame motion between the second image frame and the third image frame; and responsive to said frame-to-frame motion exceeding a threshold, acquiring a second well-exposed_image frame of the scene. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A non-transitory computer readable storage medium storing one or more instructions which, when executed by a processor, cause the processor to perform:
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acquiring a first well-exposed image frame of a scene; acquiring additional image frames of the same scene; wherein the additional image frames include a second image frame and a third image frame; generating one or more combined images based on the well-exposed image frame of the scene and at least one of the additional image frames; determining a frame-to-frame motion between the second image frame and the third image frame; and responsive to said frame-to-frame motion exceeding a threshold, acquiring a second well-exposed image frame of the scene. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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Specification