Foreground/Background Segmentation in Digital Images
AssigneeFotoNation Vision Limited
InventorsEran Steinberg, Yury Prilutsky, Peter Corcoran, Petronel Bigioi
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Abstract
An analysis and classification tool compares at least a portion of a captured image and a reference image of nominally the same scene. One of the captured and reference images is taken with flash and the other is taken without flash. The tool provides a measure of the difference in illumination between the captured image and the reference image. The tool compares the measure with a threshold and segments a foreground region from a background region based on the measure.
Claims43
A digital image acquisition system having no photographic film, comprising:
- (a) an apparatus for capturing digital images, including a lens, an image sensor and a processor;
- (b) a flash unit for providing illumination during image capture;
- (c) an analysis tool for comparing at least a portion of a captured image and a reference image of nominally the same scene, one of said captured and reference images being taken with flash and the other being taken without flash, said analysis tool providing a measure of relative differences in illumination between regions of said captured image and said reference image of groups of pixels within said scene;
- and
- (d) a classification tool for segmenting a foreground region from a background region within said scene based on said measure.
A computer readable medium having code embodied therein for programming a processor to perform a method of analyzing a captured image, the computer readable medium comprising an analysis and classification tool for comparing at least a portion of a captured image and a reference image of nominally the same scene, one of said captured and reference images being taken with flash and the other being taken without flash, said tool providing a measure of relative differences in illumination between regions of said captured image and said reference image, and said tool for segmenting a foreground region from a background region within said scene based on said measure.
Dependencies are inferred from the claim text.