Image display system
First Claim
Patent Images
1. An image display system comprising:
- a projector for projecting a first image;
a transparent screen on a rear plane of which the first image projected by the projector is focused, and on a front plane of which a second image formed by and indication portion indicating the first image is reflected;
an image taking device for taking a rear plane image of the second image and outputting image data thereof; and
a position detector for detecting a position indicated by the indication portion based on the image data,wherein the second image comprises a complete shadow portion and a half shadow portion, andwherein the complete shadow portion and the half shadow portion are formed by a reflection of the indication portion.
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Abstract
It is disclosed the image display system having a projecting device 30 for projecting a first image; a transparent screen device 10 on a rear plane of which the first image projected by the projecting device 30 is focused and on a front plane of which a second image near the first image indicated by an indication portion P is reflected; an image taking device 40 for taking a rear plane image of the screen device 10 and outputting image data thereof including the second image of the indication portion P; and a position detection device 50 for detecting a position indicated by the indication portion P based on the rear plane image included in the image data.
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Citations
14 Claims
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1. An image display system comprising:
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a projector for projecting a first image; a transparent screen on a rear plane of which the first image projected by the projector is focused, and on a front plane of which a second image formed by and indication portion indicating the first image is reflected; an image taking device for taking a rear plane image of the second image and outputting image data thereof; and a position detector for detecting a position indicated by the indication portion based on the image data, wherein the second image comprises a complete shadow portion and a half shadow portion, and wherein the complete shadow portion and the half shadow portion are formed by a reflection of the indication portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image display method comprising:
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projecting a first image; focusing the first image projected by the projector on a rear plane of a transparent screen and for reflecting a second image by an indication portion indicating the first image on a front plane of the transparent screen; taking a rear plane image of the second image and for outputting image data thereof; and detecting a position indicated by the indication portion based on the image data, wherein detecting the position indicated by the indication portion comprises detecting a top portion of the indication portion based on a density difference between a complete shadow portion and a half shadow portion formed by a shadow of the indication portion. - View Dependent Claims (12, 13, 14)
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Specification