Red-eye filter method and apparatus
First Claim
1. A portable digital camera device having no photographic film, comprising:
- (a) an integral flash for providing illumination during image acquisition;
(b) a digital image capturing apparatus including one or more image sensors for capturing a main image including a region of interest including a face, and for acquiring one or more reference images at least approximately of said same scene as the main image including said region of interest;
(c) a focusing means is configured to determine distance from the focusing means to the face and to focus the face on one or more image sensor;
(d) one or more filters for aligning the one or more reference images with the main image, and for estimating camera or object movement, or both, in one or more intervals between capture of the main and reference images;
(e) a dedicated hardware subsystem which is provided reference image data directly from at least one of the one or more image sensors;
(f) a main system memory which receives raw image data and metadata as implemented by the dedicated hardware subsystem; and
(g) wherein the main system memory is configured to receive metadata that comprises one or more camera or object movement estimates associated with the main image.
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Accused Products
Abstract
A digital image acquisition system having no photographic film, such as a digital camera, has a flash unit for providing illumination during image capture and a red-eye filter for detecting a region within a captured image indicative of a red-eye phenomenon, the detection being based upon a comparison of the captured image and a reference image of nominally the same scene taken without flash. In the embodiment the reference image is a preview image of lower pixel resolution than the captured image, the filter matching the pixel resolutions of the captured and reference images by up-sampling the preview image and/or sub-sampling the captured image. The filter also aligns at least portions of the captured image and reference image prior to comparison to allow for, e.g. movement in the subject.
11 Citations
37 Claims
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1. A portable digital camera device having no photographic film, comprising:
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(a) an integral flash for providing illumination during image acquisition; (b) a digital image capturing apparatus including one or more image sensors for capturing a main image including a region of interest including a face, and for acquiring one or more reference images at least approximately of said same scene as the main image including said region of interest; (c) a focusing means is configured to determine distance from the focusing means to the face and to focus the face on one or more image sensor; (d) one or more filters for aligning the one or more reference images with the main image, and for estimating camera or object movement, or both, in one or more intervals between capture of the main and reference images; (e) a dedicated hardware subsystem which is provided reference image data directly from at least one of the one or more image sensors; (f) a main system memory which receives raw image data and metadata as implemented by the dedicated hardware subsystem; and (g) wherein the main system memory is configured to receive metadata that comprises one or more camera or object movement estimates associated with the main image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of correcting an image defect within a digital image, comprising:
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using a processor; acquiring a main image and one or more reference images of at least approximately the same scene as the main image with the main image sensor; identifying a region of interest including a face within at least one of the one or more reference images; determining the distance between a focusing means and the face; focusing the face on the main image sensor; aligning the at least one reference image with the main image; estimating camera or object movement, or both, in one or more intervals between capture of the main and reference images; providing reference image data directly from the at least one sensor to a dedicated hardware subsystem; receiving raw image data at a main image memory, along with metadata as implemented by the dedicated hardware subsystem; and wherein the metadata comprises one or more camera of object movement estimates associated with the main image. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. One or more digital storage media having code embodied therein for programming one or more processors of a portable digital camera that includes at least one image sensor to perform a method of correcting an image defect within a digital image, wherein the method comprises:
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acquiring a main image and one or more reference images of at least approximately the same scene as the main image with the main image sensor; identifying a region of interest including a face within at least one of the one or more reference images; determining the distance between a focusing means and the face; focusing the face on the main image sensor; aligning the at least one reference image with the main image;
estimating camera or object movement, or both, in one or more intervals between capture of the main and reference images;providing reference image data directly from the at least one sensor to a dedicated hardware subsystem; receiving raw image data at a main image memory, along with metadata as implemented by the dedicated hardware subsystem; and wherein the metadata comprises one or more camera of object movement estimates associated with the main image. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification