INTERACTIVE DISPLAY DEVICE AND METHOD, USING A DETECTION CAMERA AND OPTICAL POINTER

摘要

The invention relates to an interactive display device and method. A video projector (4) projects an image on a screen (24). An optical pointer (26) includes a mouse click signal input button and a light source (33) that emits a light beam for pointing to the screen to form a light mark (15). A detection camera (11) acquires an image from the screen and detects an image from the light mark. A processing system (27) calculates the position of the light mark (15) in the detected image. According to the invention, the optical pointer (26) includes: a contact or proximity detector capable of detecting a contact between one end of the optical pointer (26) and the screen (24) and generating a light mark presence signal; and moreover a radio transmitter (29) capable of transmitting a light mark presence signal to a processing system (27). The treatment system (27) compares the respective signals for detecting a light mark and light mark presence to deduce therefrom a validation signal for said light mark.