Calibrating vision systems

• US 8,861,797 B2
• Filed: 11/12/2010
• Issued: 10/14/2014
• Est. Priority Date: 11/12/2010
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Zavesky, Eric
• Primary Examiner(s): DRENNAN, BARRY T
• Application Number:
  US12/944,897
• Publication Number:
  US 20120121185A1
• Time in Patent Office: 1,432 Days
• Field of Search: None
• US Class Current: 382/115
• CPC Class Codes: G06F 3/005 Input arrangements through a video camera
• 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: G06T 7/80 Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
• CPC Class Codes: G06V 40/113 Recognition of static hand signs
• 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

Methods, systems, and computer program calibrate a vision system. An image of a human gesture is received that frames a display device. A boundary defined by the human gesture is computed, and gesture area defined by the boundary is also computed. The gesture area is then mapped to pixels in the display device.

Claims

1. A method of calibration, comprising:

receiving, by a processor, an image of a human gesture;

calibrating by identifying the human gesture in the image;

determining a gesture interaction area framed by the human gesture;

computing an interaction boundary of the gesture interaction area;

computing a gesture area defined by the interaction boundary of the gesture interaction area;

mapping the gesture area defined by the interaction boundary of the gesture interaction area to pixels in a display device;

receiving another image of a different human gesture;

mapping the another image of the different human gesture to different regions within the gesture interaction area; and

interpreting the different regions within the gesture interaction area to a command;

wherein human gestures are calibrated to the pixels in the display device.

2. The method according to claim 1, further comprising regionalizing the gesture interaction area.

3. The method according to claim 2, further comprising transforming a coordinate of the gesture interaction area to one of the pixels in the display device.

4. The method according to claim 1, further comprising generating an acknowledgment that the calibration was successful.

5. The method according to claim 1, further comprising generating a notification that the calibration was unsuccessful.

6. The method according to claim 1, further comprising requesting the human gesture to calibrate a vision system.

7. The method according to claim 1, further comprising detecting a face in the gesture interaction area.

8. A system, comprising:

a processor; and

a memory storing code that when executed causes the processor to perform operations, the operations comprising;

receiving an image of a human gesture performed by an operator of a vision system;

calibrating by recognizing the human gesture in the image;

determining a gesture interaction area framed by the human gesture;

computing an interaction boundary defined by the gesture interaction area;

computing a gesture area defined by the gesture interaction area; and

mapping the gesture area defined by the interaction boundary of the gesture interaction area to pixels in a display device;

receiving another image of a different human gesture;

mapping the another image of the different human gesture to different regions within the gesture interaction area; and

interpreting the different regions within the gesture interaction area to a command.

9. The system according to claim 8, wherein the operations further comprise regionalizing the gesture interaction area.

10. The system according to claim 9, wherein the operations further comprise transforming a coordinate of the gesture interaction area to one of the pixels in the display device.

11. The system according to claim 8, wherein the operations further comprise generating an acknowledgment that calibration was successful.

12. The system according to claim 8, wherein the operations further comprise generating a notification that calibration was unsuccessful.

13. The system according to claim 8, wherein the operations further comprise requesting the human gesture to calibrate the vision system.

14. The system according to claim 8, wherein the operations further comprise detecting a face in the gesture interaction area.

15. A memory storing processor executable instructions that when executed cause a processor to perform operations, the operations comprising:

receiving an image of a human gesture performed by an operator of a vision system;

calibrating by recognizing the human gesture in the image;

determining a gesture interaction area framed by the human gesture;

computing an interaction boundary defined by the gesture interaction area;

computing a gesture area defined by the gesture interaction area;

mapping the gesture area defined by the interaction boundary of the gesture interaction area to pixels of a display device;

receiving another image of a different human gesture;

mapping the another image of the different human gesture to different regions within the gesture interaction area; and

interpreting the different regions within the gesture interaction area to a command.

16. The memory according to claim 15, wherein the operations further comprise regionalizing the gesture interaction area.

17. The memory according to claim 16, wherein the operations further comprise transforming a coordinate of the gesture interaction area to one of the pixels in the display device.

18. The memory according to claim 15, wherein the operations further comprise generating an acknowledgment that calibration was successful.

19. The memory according to claim 15, wherein the operations further comprise generating a notification that calibration was unsuccessful.

20. The memory according to claim 15, wherein the operations further comprise requesting the human gesture to calibrate the vision system.