Foreground/background segmentation in digital images with differential exposure calculations
First Claim
Patent Images
1. A digital image acquisition system having no photographic film, comprising:
- (a) an apparatus for capturing digital images, (b) a flash unit for providing illumination during image capture, and (c) a segmentation tool for determining one or more regions that are indicative of a foreground region, or of a background region, or of a background region and a foreground region, within at least one portion of a captured image, (d) wherein said determining comprises comparing said captured image and a reference image of nominally the same scene, and (e) wherein one of said captured and reference images being taken with flash and the other being taken without flash.
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Abstract
A digital segmentation method and apparatus determines foreground and/or background within at least one portion of a captured image. The determining includes comparing a captured image to a pre-captured or post captured reference image of nominally the same scene. One of the images is taken with flash and the other without. The system can be implemented as part of a digital camera acquisition chain having effective computation complexity.
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Citations
37 Claims
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1. A digital image acquisition system having no photographic film, comprising:
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(a) an apparatus for capturing digital images, (b) a flash unit for providing illumination during image capture, and (c) a segmentation tool for determining one or more regions that are indicative of a foreground region, or of a background region, or of a background region and a foreground region, within at least one portion of a captured image, (d) wherein said determining comprises comparing said captured image and a reference image of nominally the same scene, and (e) wherein one of said captured and reference images being taken with flash and the other being taken without flash. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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- 26. A digital segmentation tool for determining one or more regions that are indicative of a foreground region, or of a background region, or of a background region and a foreground region, within at least one portion of a captured image, wherein said determining comprises comparing said captured image and a reference image of nominally the same scene, and wherein one of said captured and reference images being taken with flash and the other being taken without flash.
Specification