Simulating high dynamic range imaging with virtual long-exposure images
First Claim
Patent Images
1. A method comprising:
- selecting a total exposure time (TET);
capturing, by an image capture device, a plurality of images of a scene, wherein the images in the plurality of images are captured using respective TETs that are based on the selected TET;
combining at least two of the images in the plurality of images to form a merged short-exposure image;
applying a digital gain to at least some pixels of the merged short-exposure image to form a virtual long-exposure image; and
combining the merged short-exposure image and the virtual long-exposure image to form an output image, wherein more of the output image is properly-exposed than either of the merged short-exposure image or the virtual long-exposure image.
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Accused Products
Abstract
A total exposure time (TET) may be selected. A plurality of images of a scene may be captured using respective TETs that are based on the selected TET. At least two of the images in the plurality of images may be combined to form a merged short-exposure image. A digital gain may be applied to the merged short-exposure image to form a virtual long-exposure image. The merged short-exposure image and the virtual long-exposure image may be combined to form an output image. More of the output image may be properly-exposed than either of the merged short-exposure image or the virtual long-exposure image.
113 Citations
20 Claims
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1. A method comprising:
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selecting a total exposure time (TET); capturing, by an image capture device, a plurality of images of a scene, wherein the images in the plurality of images are captured using respective TETs that are based on the selected TET; combining at least two of the images in the plurality of images to form a merged short-exposure image; applying a digital gain to at least some pixels of the merged short-exposure image to form a virtual long-exposure image; and combining the merged short-exposure image and the virtual long-exposure image to form an output image, wherein more of the output image is properly-exposed than either of the merged short-exposure image or the virtual long-exposure image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An article of manufacture including a non-transitory computer-readable medium, having stored thereon program instructions that, upon execution by a computing device, cause the computing device to perform operations comprising:
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selecting a total exposure time (TET); capturing a plurality of images of a scene, wherein the images in the plurality of images are captured using respective TETs that are based on the selected TET; combining at least two of the images in the plurality of images to form a merged short-exposure image; applying a digital gain to the merged short-exposure image to form a virtual long-exposure image; and combining the merged short-exposure image and the virtual long-exposure image to form an output image, wherein more of the output image is properly-exposed than either of the merged short-exposure image or the virtual long-exposure image. - View Dependent Claims (12, 13, 14, 15)
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16. A computing device comprising:
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at least one processor; data storage; and program instructions, stored in the data storage, that upon execution by the at least one processor cause the computing device to perform operations including; selecting a total exposure time (TET); capturing a plurality of images of a scene, wherein the images in the plurality of images are captured using respective TETs that are based on the selected TET; combining at least two of the images in the plurality of images to form a merged short-exposure image; applying a digital gain to the merged short-exposure image to form a virtual long-exposure image; and combining the merged short-exposure image and the virtual long-exposure image to form an output image, wherein more of the output image is properly-exposed than either of the merged short-exposure image or the virtual long-exposure image. - View Dependent Claims (17, 18, 19, 20)
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Specification