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 one camera to capture an image of said background, said at least one camera 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 the image of the background including the displayed image;
processing the captured image to detect the existence of a subject therein 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, said image data masking compensating for said differing camera and projector viewpoints.
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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.
80 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 one camera to capture an image of said background, said at least one camera 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 the image of the background including the displayed image; processing the captured image to detect the existence of a subject therein 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, 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; processing each set of captured images to detect the existence of the subject and to locate generally the subject'"'"'s head; 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 one camera capturing an image of the background including the projected image, said at least one camera being spaced from said projector and having a viewpoint differing from that of said projector; and processing structure processing the captured image to locate a subject in the captured image and to map 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, 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; and using the image disparity and the geometry of the projection system to calculate the background to subject distance. - 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 and at least one camera to capture an image of said background, 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; and positioning said at least one camera relative to and within said maximum camera to projector spacing of said projector.
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Specification