Surveillance system with master camera control of slave cameras

• US 5,164,827 A
• Filed: 08/22/1991
• Issued: 11/17/1992
• Est. Priority Date: 08/22/1991
• Status: Expired due to Term

• Current Assignee: Sensormatic Electronics LLC (Johnson Controls International plc)
• Original Assignee: Sensormatic Electronics Corporation (Johnson Controls International plc)
• Inventors: Paff, Robert
• Primary Examiner(s): Kostak, Victor R.
• Application Number:
  US07/748,756
• Time in Patent Office: 453 Days
• Field of Search: 358/210, 358/108, 358/87, 358/185, 358/181, 358/225
• US Class Current: 348/143
• CPC Class Codes: G08B 13/19608 Tracking movement of a target, e.g. by detecting an object predefined as a target, using target direction and or velocity to predict its new position
• CPC Class Codes: G08B 13/19643 wherein the cameras play different roles, e.g. different resolution, different camera type, master-slave camera
• CPC Class Codes: G08B 13/19689 Remote control of cameras, e.g. remote orientation or image zooming control for a PTZ camera
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources

Abstract

A camera surveillance system in which a master adjustable camera selects a position in a premises and transmits information related to the selected position to a slave adjustable camera. Based on this related information, the slave adjustable camera trains on or views the selected position.

Claims

1. A camera surveillance system for providing visual surveillance of a location, comprising:

a master adjustable camera means having an adjustable optical axis, said master adjustable camera means selecting a position in said location along said adjustable optical axis of said master adjustable camera means;

communication means for communicating information relating to said selected position; and

one or more slave adjustable camera means, a particular slave adjustable camera means having an adjustable optical axis and being responsive to said information related to said selected position communicated by said communication means for adjusting the adjustable optical axis of the particular slave adjustable camera means.

2. A camera surveillance system in accordance with claim 1 wherein:

said adjusting of the adjustable optical axis of a particular slave adjustable camera means is such as to direct the adjustable optical axis of the particular slave adjustable camera means at said selected position if the distance of the particular adjustable camera means to said selected position is equal to or less than a predetermined distance;

and the adjusting of the adjustable optical axis of a particular slave adjustable camera means is such as to not direct the adjustable optical axis of the particular slave adjustable camera means at said selected position if the distance of the particular adjustable camera means to said selected position is greater than said predetermined distance.

3. A camera surveillance system in accordance with claim 2 further comprising:

a monitoring station responsive to said master adjustable camera means and said one or more slave adjustable camera means, said monitoring station including a primary monitor for displaying the image being viewed by said master adjustable camera means and one or more secondary monitors for selectively displaying the images being viewed by said one or more slave adjustable camera means.

4. A camera surveillance system in accordance with claim 3 wherein:

said monitoring station includes means for automatically enabling displaying of the image being viewed by a particular slave adjustable camera means on a secondary monitor when the distance of the particular slave adjustable camera means to the selected position becomes equal to or less than said predetermined distance.

5. A camera surviellance system in accordance with claim 4 wherein:

said monitoring station further includes means for automatically disabling displaying of the image being viewed by a particular slave adjustable camera means on a secondary monitor when the distance of the particular slave adjustable camera means to the selected position becomes greater than said preselected distance.

6. A camera surveillance system in accordance with claim 1 wherein:

said adjusting of the adjustable optical axis of a particular slave adjustable camera means is such as to direct the adjustable optical axis of the particular slave adjustable camera means at said selected position.

7. A camera surveillance system in accordance with claim 6 wherein:

said selected position is in a predetermined horizontal plane in said location.

8. A camera surveillance system in accordance with claim 7 wherein:

said information includes the relative location of said selected position in said predetermined horizontal plane.

9. A camera surveillance system in accordance with claim 8 wherein:

said master adjustable camera means defines;

a pan angle;

a tilt angle;

a height relative to said predetermined horizontal plane; and

a relative position with respect to its projection in said horizontal plane;

and said master adjustable camera means calculates said relative location of said selected position using said pan and tilt angles, said height of said master adjustable camera means and said relative position of said master adjustable camera means in said plane.

10. A camera surveillance system in accordance with claim 9 wherein:

a particular slave adjustable camera means, responsive to said information related to said selected position communicated by said communication means, determines a pan angle and a tilt angle of the particular slave adjustable camera means and adjusts said optical axis of the particular adjustable camera means in accordance with said determined pan and tilt angles, whereby said optical axis of said particular slave adjustable camera means is made to intersect said selected position.

11. A camera surveillance system in accordance with claim 7 wherein:

said master adjustable camera means defines;

a pan angle; and

a tilt angle;

and said related information includes said pan and tilt angles.

12. A camera surveillance system in accordance with claim 11 wherein:

a particular slave adjustable camera means stores information with respect to the height of said master adjustable camera means relative to said predetermined horizontal plane and the relative position of said master adjustable cameras projected into said predetermined horizontal plane;

and a particular slave adjustable camera means uses said height and relative position information and said related information to determine a pan angle and a tilt angle of the particular slave adjustable camera means and adjusts said optical axis of the particular slave adjustable camera means in accordance with said determined pan and tilt angles, whereby said optical axis of said slave adjustable camera means is made to intersect said selected position.

13. A camera surveillance system in accordance with claim 1 further comprising:

control station means for causing said master adjustable camera to select said position.

14. A camera surveillance system in accordance with claim 1 wherein:

said related information includes focus information of said master adjustable camera means.

15. A camera surveillance system in accordance with claim 1 wherein:

said related information includes zoom information of said master adjustable camera means.

16. A method for providing visual surveillance of a location, comprising:

selecting with a master adjustable camera means having an adjustable optical axis, a position in said location along said adjustable optical axis of said master adjustable camera means;

communicating information relating to said selected position; and

responsive to said communicated information related to said selected position, adjusting the adjustable optical axis of one or more slave adjustable camera means.

17. A method in accordance with claim 16 wherein:

said adjusting of the adjustable optical axis of a particular slave adjustable camera means is such as to direct the adjustable optical axis of the particular slave adjustable camera means at said selected position if the distance of the particular adjustable camera means to said selected position is equal to or less than a predetermined distance;

and the adjusting of the adjustable optical axis of a particular slave adjustable camera means is such as to not direct the adjustable optical axis of the particular slave adjustable camera means at said selected position if the distance of the particular adjustable camera means to said selected position is greater than said predetermined distance.

18. A method in accordance with claim 17 further comprising:

displaying at a monitoring station on a primary monitor the image being viewed by said master adjustable camera means and selectively on one or more secondary monitors the images being viewed by said one or more slave adjustable camera means.

19. A method in accordance with claim 18 wherein:

said step of displaying includes automatically enabling displaying the image being viewed by a particular slave adjustable camera means when the distance of the particular slave adjustable camera means to the selected position becomes equal to or less than said predetermined distance.

20. A method in accordance with claim 19 wherein:

said step of displaying further includes automatically disabling displaying of the image being viewed by a particular slave adjustable camera means on a secondary monitor when the distance of the particular slave adjustable camera means to the selected position becomes greater than said predetermined distance.

21. A method in accordance with claim 16 wherein:

said adjusting of said adjustable optical axis of a particular slave adjustable camera means is such as to direct the adjustable optical axis of the particular slave adjustable camera means at said selected position.

22. A method in accordance with claim 21 wherein:

said selected position is in a predetermined horizontal plane in said location.

23. A camera surveillance system in accordance with claim 22 wherein:

said information includes the relative location of said selected position in said predetermined horizontal plane.

24. A method in accordance with claim 23 wherein:

said master adjustable camera means defines;

a pan angle;

a tilt angle;

a height relative to said predetermined horizontal plane; and

a relative position with respect to its projection in said horizontal plane;

and said method further includes said master adjustable camera means calculating said relative location of said selected position using said pan and tilt angles, said height of said master adjustable camera means and said relative position of said master adjustable camera means in said plane.

25. A method in accordance with claim 24 wherein:

said method further includes for a particular slave adjustable camera means, responsive to said communicated related information, determining a pan angle and a tilt angle of the particular slave adjustable camera means and adjusting said optical axis of the particular slave adjustable camera means in accordance with said determined pan and tilt angles, whereby said optical axis of the particular slave adjustable camera means is made to intersect said selected position.

26. A method in accordance with claim 22 wherein:

said master adjustable camera means defines;

a pan angle; and

a tilt angle;

and said related information includes said pan and tilt angles.

27. A method in accordance with claim 26 wherein:

a particular slave adjustable camera means stores information with respect to the height of said master adjustable camera means relative to said predetermined horizontal plane and the relative position of said master adjustable cameras projected into said predetermined horizontal plane;

and said method further includes for a particular slave adjustable camera means, using said height and relative position information and said relative information, determining a pan angle and a tilt angle of the particular slave adjustable camera means and adjusting said optical axis of the particular slave adjustable camera means in accordance with said determined pan and tilt angles, whereby said optical axis of the particular slave adjustable camera means is made to intersect said selected position.

28. A method in accordance with claim 16 further comprising:

remotely causing said master adjustable camera means to select said position.

29. A method in accordance with claim 16 wherein:

said related information includes focus information of said master adjustable camera means.

30. A method in accordance with claim 16 wherein:

said related information includes zoom information of said master adjustable camera means.