Determining proximity of a mobile device to a subject based on shadow analysis
First Claim
Patent Images
1. A cell phone comprising:
- a camera for capturing images and video;
memory for buffering captured images and video;
means for identifying a shadow cast by the cell phone on a subject being imaged by said camera by analyzing buffered captured images and video; and
means for determining proximity from the cell phone to the subject based on the identified shadow.
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Abstract
Portions of the disclosure relate generally to shadow analysis, e.g., on mobile platforms. One claim recites a mobile phone comprising: a camera for capturing images and video; memory for buffering captured images and video; means for identifying a shadow cast by the mobile phone on a subject being imaged by said camera by analyzing buffered captured images and video; and means for determining proximity to the subject based on an analysis of the shadow. Of course, other claims and combinations are provided too.
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Citations
15 Claims
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1. A cell phone comprising:
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a camera for capturing images and video; memory for buffering captured images and video; means for identifying a shadow cast by the cell phone on a subject being imaged by said camera by analyzing buffered captured images and video; and means for determining proximity from the cell phone to the subject based on the identified shadow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A cell phone comprising:
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a camera for capturing imagery; memory for buffering captured imagery; means for identifying a shadow cast by the cell phone on a subject being imaged by said camera; and means for redressing the shadow in connection with;
i) reading a digital watermark from imagery captured of the subject, or ii) calculating a fingerprint from the imagery captured of the subject, in which said means for redressing the shadow disregards image content associated with the shadow when reading the digital watermark or calculating a fingerprint. - View Dependent Claims (12)
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13. A cell phone comprising:
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a camera for capturing imagery; memory for buffering captured imagery; means for identifying a shadow cast by the cell phone on a subject being imaged by said camera, in which said means for identifying a shadow locates candidate edges, in which candidate edges once identified in image data are matched against a series of reference templates; and means for redressing the shadow in connection with;
i) reading a digital watermark from imagery captured of the subject, or ii) calculating a fingerprint from the imagery captured of the subject. - View Dependent Claims (14)
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15. A cell phone comprising:
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a camera for capturing imagery; means for buffering captured imagery; means for identifying a shadow cast by the cell phone on a subject being imaged by said camera; and means for redressing the shadow in connection with;
i) reading a digital watermark from imagery captured of the subject, or ii) calculating a fingerprint from the imagery captured of the subject, in which said means for redressing the shadow ranks candidate pixel or image regions for submission to a watermark detector or to a fingerprint analyzer, and in which shadowed regions are ranked relatively lower than un-shadowed regions.
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Specification