Image display system

• US 20050195127A1
• Filed: 02/10/2005
• Published: 09/08/2005
• Est. Priority Date: 02/17/2004
• Status: Active Grant

• Current Assignee: Universal Entertainment Corporation
• Original Assignee: Aruze Corp.
• Inventors: Sato, Osamu
• Granted Patent: US 7,483,015 B2
• Time in Patent Office: Days
• US Class Current: 345/1.1
• CPC Class Codes: G06F 3/0425 using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected tracking a projected light spot to determine a position on a display surface G06F3/0386
• CPC Class Codes: G07F 17/3211 Display means

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.

Claims

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 an 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.

2. The image display system according to claim 1, wherein the position detected by the position detector is accepted as an input information from a user.

3. The image display system according to claim 1, wherein the position detector conducts a binarization process of the image data and detects the position indicated by the indication portion based on the image data after the binarization process is done.

4. The image display system according to claim 1, further comprising:

a light source for emitting white light to the indication portion and the front plane of the transparent screen.

5. The image display system according to claim 1, wherein the image taking device takes the rear plane image of the transparent screen and a circumference portion of the transparent screen, and

wherein the circumference portion is colored in a dark color.

6. An image display method comprising steps of:

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.