System and method for inputing user commands to a processor

• US 8,648,828 B2
• Filed: 12/21/2011
• Issued: 02/11/2014
• Est. Priority Date: 03/22/2004
• Status: Active Grant

• Current Assignee: Keter-Plastic Limited
• Original Assignee: Keter-Plastic Limited
• Inventors: Katz, Itay
• Primary Examiner(s): SHERMAN, STEPHEN G
• Application Number:
  US13/332,413
• Publication Number:
  US 20120092304A1
• Time in Patent Office: 783 Days
• Field of Search: 345156-178, 178 1801- 1809, 178/18.11, 178 1901- 1907, 178/20.01
• US Class Current: 345/173
• 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 3/0304 Detection arrangements using opto-electronic means constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042
• CPC Class Codes: G06T 7/20 Analysis of motion motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51
• CPC Class Codes: G06T 7/73 using feature-based methods

Abstract

Provided is a system for inputting operation system (OS) commands to a data processing device. The system includes a video camera that captures images of a viewing space. A processor detects a predetermined object in the images using an object recognition algorithm not involving background information in an image. One or more image analysis parameters of the object are extracted from the images and one or more motion detection tests are applied. Each motion detection test has an associated OS command, and when a test succeeds, the OS command associated with the test is executed. By not relying on background information in an image, the described system may be used in devices that are moved in use, such as a palm plot, personal digital assistant (PDA), a mobile telephone, a digital camera, and a mobile game machine.

Claims

1. A system for inputting operation system (OS) commands to a data processing device, comprising:

a video camera capturing images of a viewing space; and

a processor configured to;

detect a predetermined object in one or more images obtained by the camera using an object recognition algorithm, whether information indicating a pixel in the image is either a background pixel or an object pixel is unknown prior to detection of the predetermined object in an image;

extract one or more image analysis parameters of the object in the one or more images obtained by the camera; and

for each of one or more motion detection tests;

applying the motion detection test to image analysis parameters extracted during a recent time window; and

executing an operating system command associated with the motion detection test if the motion detection test succeeds.

2. The system according to claim 1, wherein detecting a predetermined object in one or more images obtained by the camera is carried out using a segmentation algorithm, whether information indicating the pixel in the image either is a background pixel or the object pixel is unknown prior to detection of the predetermined object in the image.

3. The system according to claim 1, wherein the predetermined object is a finger or a stylus.

4. The system according to claim 1, wherein one or more of the image analysis parameters is history independent.

5. The system according to claim 1, wherein one or more of the image analysis parameters is history dependent.

6. The system according to claim 1, wherein one or more of the image analysis parameters is selected from the group consisting of:

a location of a tip of the object in an image, a width of the object in an image, a length of the object in an image, an orientation of the object in an image, a speed of the object at a time the image was obtained by the camera, a change in the a width of the object at a time the image was obtained by the camera, a rate of rotation of the object at a time the image was obtained by the camera, and an image analysis parameter having a first value if the object is detected in the image and a second value if the object is not detected in the image.

7. The system according to claim 1, wherein one or more of the motion detection tests is a motion detection test detecting a motion selected from the group consisting of:

during the time window the object approached the camera, during the time window the object moved away from the camera, during the time window the object first approached the camera and then moved away from the camera, during the time window the object disappeared from the viewing space of the camera, during the time window the object moved in a predetermined path, during the time window the object rotated, during the time window the object was stationary, during the time window the object moved, during the time window the object performed a flicking motion, during the time window the object accelerated, during the time window the object decelerated, and during the time window the object moved and then stopped.

8. The system according to claim 7, wherein one or more of the motion detection tests is a motion detection test detecting that the object moved in a predetermined path during the time window.

9. The system according to claim 1, wherein one or more of the OS commands is selected from the group consisting of:

depressing a virtual key displayed on a screen, moving a curser appearing on a screen, running on the processor a software application, turning a light on or off, turning off the system, zooming in or out of a picture on a screen, adjusting a radio or other entertainment device, adjusting a medical device, and sending a command to an application.

10. A data processing device comprising the system for inputting operation system (OS) commands according to claim 1.

11. The data processing device according to claim 10, selected from the group consisting of a personal computer (PC), a portable computer, a PDA, a laptop, a palm plot, a mobile telephone, a radio, a digital camera a vehicle, a medical device, a smart home appliance, and a mobile game machine.

12. A method for inputting operation system (OS) commands to a data processing device having a video camera capturing images of a viewing space, the non-transitory method comprising:

detecting a predetermined object in one or more images obtained by the camera using an object recognition algorithm, whether information indicating a pixel in the image is either a background pixel or an object pixel is unknown prior to detection of the predetermined object in an image;

extracting one or more image analysis parameters of the object in the one or more images obtained by the camera; and

for each of one or more motion detection tests;

applying the motion detection test to image analysis parameters extracted during a recent time window; and

executing an operating system command associated with the motion detection test if the motion detection test succeeds.

13. The method according to claim 12, wherein detecting a predetermined object in one or more images obtained by the camera is carried out using a segmentation algorithm.

14. The method according to claim 12, wherein the predetermined object is one or more fingers or a stylus.

15. The method according to claim 12, wherein one or more of the image analysis parameters is history independent.

16. The method according to claim 12, wherein one or more of the image analysis parameters is history dependent.

17. The method according to claim 12, wherein one or more of the image analysis parameters is selected from the group consisting of:

a location of a tip of the object in an image, a width of the object in an image, a length of the object in an image, an orientation of the object in an image, a speed of the object at a time the image was obtained by the camera, a change in the a width of the object at a time the image was obtained by the camera, a rate of rotation of the object at a time the image was obtained by the camera, and an image analysis parameter having a first value if the object is detected in the image and a second value if the object is not detected in the image.

18. The method according to claim 12, wherein one or more of the motion detection tests is a motion detection test detecting a motion selected from the group consisting of:

during the time window the object approached the camera, during the time window the object moved away from the camera, during the time window the object first approached the camera and then moved away from the camera, during the time window the object disappeared from the viewing space of the camera, during the time window the object moved in a predetermined path, during the time window the object rotated, during the time window the object was stationary, during the time window the object moved, during the time window the object performed a flicking motion, during the time window the object accelerated, during the time window the object decelerated, and during the time window the object moved and then stopped.

19. The method according to claim 18, wherein one or more of the motion detection tests is a motion detection test detecting that the object moved in a predetermined path during the time window, wherein the predetermined path traces an alphanumeric character.

20. The method according to claim 12, wherein one or more of the OS commands is selected from the group consisting of:

depressing a virtual key displayed on a screen, moving a curser appearing on a screen, running on the processor a software application, turning a light on or off, turning off the system, zooming in or out of a picture on a screen, adjusting a radio or other entertainment device, adjusting a medical device, and sending a command to an application.

21. A non-transitory computer program product, comprising computer program code for performing all the steps of claim 12, when said program is run on a computer.

22. A computer program as claimed in claim 21, embodied on a non-transitory computer readable medium.

23. A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for inputting operation system (OS) commands to a data processing device having a video camera capturing images of a viewing space, the non-transitory method comprising:

detecting a predetermined object in one or more images obtained by the camera using an object recognition algorithm, whether information indicating a pixel in the image is either a background pixel or an object pixel is unknown prior to detection of the predetermined object in an image;

extracting one or more image analysis parameters of the object in the one or more images obtained by the camera; and

for each of one or more motion detection tests;

applying the motion detection test to image analysis parameters extracted during a recent time window; and

executing an operating system command associated with the motion detection test if the motion detection test succeeds.

24. A computer program product, comprising a computer useable medium having computer readable program code embodied therein for inputting operation system (OS) commands to a data processing device having a video camera capturing images of a viewing space, the non-transitory computer program product comprising:

computer readable program code for causing the computer to detect a predetermined object in one or more images obtained by the camera using an object recognition algorithm, whether information indicating a pixel in the image is either a background pixel or an object pixel is unknown prior to detection of the predetermined object in an image;

computer readable program code for causing the computer to extract one or more image analysis parameters of the object in the one or more images obtained by the camera; and

computer readable program code for causing the computer, for each of one or more motion detection tests, to apply the motion detection test to image analysis parameters extracted during a recent time window; and

to execute an operating system command associated with the motion detection test if the motion detection test succeeds.