ENHANCED INPUT USING FLASHING ELECTROMAGNETIC RADIATION

• US 20130241892A1
• Filed: 05/03/2013
• Published: 09/19/2013
• Est. Priority Date: 02/15/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: SHAMAIE, Atid, MACDOUGALL, Francis
• Granted Patent: US 8,818,040 B2
• Time in Patent Office: Days
• US Class Current: 345/175
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06F 3/042 by opto-electronic means
• 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: G06V 10/145 Illumination specially adapted for pattern recognition, e.g. using gratings
• CPC Class Codes: G06V 40/28 Recognition of hand or arm movements, e.g. recognition of deaf sign language static hand signs G06V40/113

Abstract

Enhanced input using flashing electromagnetic radiation, in which first and second images of an object are accessed. The first image being captured while the object is illuminated with projected electromagnetic radiation, and the second image being captured while the projected electromagnetic radiation is extinguished. A position of the object relative to the screen based on comparing the first and second images is determined. An application is controlled based on the determined position.

Claims

1. A computer-implemented method comprising:

accessing first and second images of an object;

projecting at least a portion of projected electromagnetic radiation as a first light curtain along and parallel to at least a portion of a first side of the screen;

determining a position of the object relative to a screen based on comparing the first and second images; and

controlling an application based on the determined position.