Touch system for blue screen

• US 9,191,665 B1
• Filed: 09/10/2012
• Issued: 11/17/2015
• Est. Priority Date: 06/19/2007
• Status: Expired due to Fees

• Current Assignee: Imaging Systems Technology Incorporated
• Original Assignee: Imaging Systems Technology Incorporated
• Inventors: Kurtz, Victoria, Wedding, Carol Ann, Afzal, Rebecca
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): Rodriguez, Joseph G
• Application Number:
  US13/607,860
• Time in Patent Office: 1,163 Days
• Field of Search: 345/173, 345/157
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• 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: H04N 19/162 User input
• CPC Class Codes: H04N 9/75 Chroma key

Abstract

A touch input system comprising a chroma-key/matte display system with a calibrated touch input near or on a matte.

Claims

1. A method of aligning a touch input device positioned on a chroma-key/matte backdrop which comprises using a laser beam or like leveling means to assure a level line is determined with respect to some known reference, said device having a framework consisting of four rigid strips each at right angles to one another that define the active touch area of the touch device, said strips being mounted to the chroma-key/matte surface, said strips being coated with a chroma-key/matte compatible color to assist in camouflaging the frame for wider camera shots.

2. The invention of claim 1 wherein said laser guides are used to provide alignment and to provide a calibration location at the x-y intersections of the lasers.

3. The invention of claim 1 wherein the touch input device is an IR touch comprising printed circuit boards with infrared LED sensors and emitters mounted on the rigid strips.

4. The invention of claim 3 wherein the LEDs are recessed in the printed circuit boards within the frame so as to reduce the interference of studio ambient light.