Method and apparatus for inhibiting a subject's eyes from being exposed to projected light
First Claim
1. In a projection system comprising a projector to project an image for display on a background and at least two cameras to capture images of said background from different vantages, each of said at least two cameras having a viewpoint differing from the viewpoint of said projector, a method of inhibiting a subject'"'"'s eyes from being exposed to projected light when the subject is positioned in front of the background, said method comprising:
- capturing sets of images of the background including the displayed image;
processing the captured images to detect the existence of a subject therein and to locate generally the depth of the subject from said background; and
masking image data used by the projector to project the image corresponding to a region that encompasses at least the subject'"'"'s eyes, said image data masking compensating for said differing camera and projector viewpoints.
8 Assignments
0 Petitions
Accused Products
Abstract
A method of inhibiting a subject'"'"'s eyes from being exposed to projected light when the subject is positioned in front of a background on which an image is displayed comprises capturing an image of the background including the displayed image, processing the captured image to detect the existence of the subject and to locate generally the subject and masking image data used by the projector to project the image corresponding to a region that encompasses at least the subject'"'"'s eyes, the image data masking compensating for differing camera and projector viewpoints.
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Citations
28 Claims
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1. In a projection system comprising a projector to project an image for display on a background and at least two cameras to capture images of said background from different vantages, each of said at least two cameras having a viewpoint differing from the viewpoint of said projector, a method of inhibiting a subject'"'"'s eyes from being exposed to projected light when the subject is positioned in front of the background, said method comprising:
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capturing sets of images of the background including the displayed image; processing the captured images to detect the existence of a subject therein and to locate generally the depth of the subject from said background; and masking image data used by the projector to project the image corresponding to a region that encompasses at least the subject'"'"'s eyes, said image data masking compensating for said differing camera and projector viewpoints. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a projection system comprising a projector to project an image for display on a background and at least two laterally spaced cameras to capture an image of said background, a method of inhibiting a subject'"'"'s eyes from being exposed to projected light when the subject is positioned in front of the background, said method comprising:
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successively capturing sets of images of the background including the displayed image from different vantages; processing each set of captured images to detect the existence of the subject and to locate generally the depth of the subject'"'"'s head from the background; and modifying image data used by the projector to project the image taking into account differing viewpoints of said cameras and projector, so that the displayed image comprises an area of darkness that at least encompasses the subject'"'"'s eyes and that does not extend appreciably beyond the subject'"'"'s head. - View Dependent Claims (14, 15, 16)
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17. A projection system comprising:
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a projector receiving image data and projecting an image onto a background; at least two cameras capturing images of the background including the projected image from different vantages, each of said at least two cameras being spaced from said projector and having a viewpoint differing from that of said projector; and processing structure processing the captured images to locate a subject in the captured images and to map the depths of the subject to the viewpoint of said projector, said processing structure masking image data used by the projector to project the image corresponding to a region that encompasses at least the subject'"'"'s eyes. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. In a projection system comprising a projector to project an image for display on a background and at least two spaced cameras to capture images of said background from different vantages, a method of determining the distance a subject in the captured image is from the background, said method comprising:
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comparing the images captured by the cameras to determine image disparity; using the image disparity and the geometry of the projection system to calculate the background to subject distance; and masking at least a portion of the subject. - View Dependent Claims (25, 26, 27)
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28. In a projection system comprising a projector to project an image for display on a background, an image processor and at least two cameras to capture images of said background from different vantages, a method of setting up said projection system comprising:
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determining the orthogonal distance between the background and the projector and determining the width of said background; assuming a maximum distance that a subject will stand in front of said background; using the orthogonal distance, the width and the maximum distance to calculate a maximum camera to projector spacing; positioning said at least two cameras relative to and within said maximum camera to projector spacing of said projector; and during image projection, masking at least a portion of the subject.
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Specification