SWITCHING DEVICE

• US 20140160013A1
• Filed: 11/26/2013
• Published: 06/12/2014
• Est. Priority Date: 12/10/2012
• Status: Abandoned Application

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: LIU, TIEN-CHIA
• Application Number:
  US14/090,346
• Publication Number:
  US 20140160013A1
• Time in Patent Office: Days
• US Class Current: 345/156
• 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

Abstract

There is provided a switching device including an image sensor, a processing unit and a transmission unit. The image sensor successively captures image frames. The processing unit is configured to generate a control signal when sequentially recognizing an open hand gesture and a closed fist gesture or sequentially recognizing a closed fist gesture and an open hand gesture according to the image frames within a predetermined time interval. The transmission unit is configured to transmit the control signal to an electronic device.

Claims

1. A switching device, configured to control an electronic device, the switching device comprising:

an image sensor configured to successively capture image frames;

a processing unit configured to generate a control signal when sequentially recognizing an open hand gesture and a closed fist gesture or sequentially recognizing the closed fist gesture and the open hand gesture according to the image frames within a predetermined time interval; and

a transmission unit configured to transmit the control signal to the electronic device.

2. The switching device as claimed in claim 1, wherein when recognizing the open hand gesture in a first image frame, the processing unit recognizes the closed fist gesture only according to a predetermined image range of the image frames captured after the first image frame;

or when recognizing the closed fist gesture in the first image frame, the processing unit recognizes the open hand gesture only according to the predetermined image range of the image frames captured after the first image frame.

3. The switching device as claimed in claim 2, wherein the processing unit only processes image data of the predetermined image range within the predetermined time interval.

4. The switching device as claimed in claim 1, wherein the image sensor is a far-infrared sensor.

5. The switching device as claimed in claim 1, further comprising an infrared light source configured to illuminate a field of view of the image sensor.

6. The switching device as claimed in claim 1, further comprising a solar energy module configured to provide electricity for operation.

7. The switching device as claimed in claim 1, wherein the predetermined time interval is from 0.5 to 2 seconds.

8. A switching device, configured to control an electronic device, the switching device comprising:

an image sensor configured to successively capture image frames;

a processing unit configured to identify an object shape and an object area according to the image frames and generate a control signal when the object shape matches a predetermined shape, the object area matches a predetermined area and a predetermined area change occurs within a predetermined time interval; and

a transmission unit configured to transmit the control signal to the electronic device.

9. The switching device as claimed in claim 8, wherein when the object shape in a first image frame matches the predetermined shape and the object area in the first image frame matches the predetermined area, the processing unit recognizes the predetermined area change only according to a predetermined image range of the image frames captured after the first image frame.

10. The switching device as claimed in claim 9, wherein the processing unit only processes image data of the predetermined image range within the predetermined time interval.

11. The switching device as claimed in claim 8, wherein the image sensor is a far-infrared sensor.

12. The switching device as claimed in claim 8, further comprising an infrared light source configured to illuminate a field of view of the image sensor.

13. The switching device as claimed in claim 8, further comprising a solar energy module configured to provide electricity for operation.

14. The switching device as claimed in claim 8, wherein the predetermined shape is a circle and an ellipsoid.

15. The switching device as claimed in claim 8, wherein the predetermined area change is an area change of 40%-60% or 140%-160% of the object area.

16. The switching device as claimed in claim 8, wherein the predetermined time interval is from 0.5 to 2 seconds.

17. An operating method of a switching device, the switching device comprising an image sensor and a processing unit, the operating method comprising:

successively capturing image frames with the image sensor;

recognizing, using the processing unit, an open hand gesture or a closed fist gesture according to the image frames; and

generating a control signal when the processing unit recognizes the open hand gesture or the closed fist gesture and recognizes a predetermined gesture change within a predetermined time interval.

18. The operating method as claimed in claim 17, wherein the predetermined gesture change is a change from the open hand gesture to the closed fist gesture or from the closed fist gesture to the open hand gesture.

19. The operating method as claimed in claim 17, further comprising:

only processing, using the processing unit, image data of a predetermined image range of the image frames captured by the image sensor within the predetermined time interval when recognizing the open hand gesture or the closed fist gesture in a first image frame.

20. The operating method as claimed in claim 17, wherein when the open hand gesture and the closed fist gesture are not recognized, the operating method further comprises:

identifying, using the processing unit, an object shape and an object area according to the image frames; and

generating the control signal when the object shape matches a predetermined shape, the object area matches a predetermined area and a predetermined area change occurs within the predetermined time interval.