Method for selecting and manipulating a graphical object in an interactive input system, and interactive input system executing the method

• US 8,810,522 B2
• Filed: 04/14/2009
• Issued: 08/19/2014
• Est. Priority Date: 09/29/2008
• Status: Active Grant

• Current Assignee: Smart Technologies ULC (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Smart Technologies ULC (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Tse, Edward, Rounding, Kathryn
• Primary Examiner(s): Xiao, Ke
• Assistant Examiner(s): He, Weiming
• Application Number:
  US12/423,726
• Publication Number:
  US 20100079493A1
• Time in Patent Office: 1,953 Days
• Field of Search: 715/702, 715/790, 715/863
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04109 FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• 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: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

A method for selecting a graphic widget displayed on a background of an interactive input system comprises tracking one or more touch points associated with the background, and in the event that one or more touch points coincide with a location of the graphic widget, associating the coinciding touch points with the graphic widget.

Claims

1. A computer implemented method of erasing user input displayed in a graphic widget positioned on a background of an interactive input system comprising:

detecting contact of a new touch point at a location coinciding with the graphic widget;

tracking the new touch point associated with the graphic widget; and

in the event that the new touch point that is associated with the graphic widget crosses an edge of the graphic widget as it is moved from a location coinciding with the graphic widget to a location outside of the graphic widget, erasing the user input displayed in the graphic widget.

2. The method of claim 1, wherein the user input comprises inputted text.

3. The method of claim 1, wherein the user input comprises an object.

4. The method of claim 1, wherein the user input comprises a horizontal motion.