Automatic pan and tilt compensation system for a camera support structure

• US 20050007553A1
• Filed: 05/13/2004
• Published: 01/13/2005
• Est. Priority Date: 03/23/2001
• Status: Active Grant

• Current Assignee: Courtland Capital Market Services LLC
• Original Assignee: Panavision Incorporated
• Inventors: Romanoff, Andrew B., Keesling, Michael J.
• Granted Patent: US 7,101,045 B2
• Time in Patent Office: Days
• US Class Current: 352/243
• CPC Class Codes: B66F 11/048 Mobile camera platform
• CPC Class Codes: F16M 11/10 around a horizontal axis F16M11/12 takes precedence
• CPC Class Codes: F16M 11/18 with mechanism for moving the apparatus relatively to the stand
• CPC Class Codes: F16M 11/2014 around a vertical axis F16M11/2035 takes precedence
• CPC Class Codes: F16M 11/2092 comprising means allowing depth adjustment, i.e. forward-backward translation of the head relatively to the undercarriage
• CPC Class Codes: F16M 11/42 with arrangement for propelling the support stands on wheels
• CPC Class Codes: F16M 2200/044 for balancing rotational movement of the undercarriage

Abstract

An automated system for compensating the pan and tilt of a camera head for the movements of a camera support structure and/or a subject matter. A processing system receives signals relating to the movement of the camera support structure, such as the swing, boom and telescope of the crane arm, the movements of a dolly, and preferably the movements of a subject matter. The system employs these inputs to determine the position of the camera and subject matter in a defined world coordinate system and sends signals to compensate the pan and tilt of the camera head so that the field of view of the camera is generally centered on the subject matter being filmed as defined within the system.

Claims

1. An automated remote camera head pan and tilt compensation system comprising:

a dolly configured to be capable of movement with multiple degrees of freedom;

a remote camera head coupled to the dolly and adapted to pan and tilt;

one or more sensors coupled to the dolly for generating data related to a direction and travel of the dolly; and

a processing system coupled to the dolly and configured for receiving the data from the sensors, continuously updating a position of the dolly, and transmitting signals to the remote camera head to pan and tilt the remote camera head to compensate for movements of the dolly so that regardless of the movement of the dolly, the remote camera head maintains its field of view generally centered on a position of a subject matter.

2. The automated camera head pan and tilt compensation system according to claim 1, wherein the processing system is further configured for treating the dolly as an imaginary remote camera head crane with a remote camera head of the imaginary remote camera head crane located at an actual position of the remote camera head on the dolly.

3. The automated camera head pan and tilt compensation system according to claim 2, wherein the processing system is further configured for converting the sensor data to swing, boom and telescope movements of the imaginary remote camera head crane to assist in determining the automatic pan and tilt compensation for the remote camera head on the dolly.

4. The automated camera head pan and tilt compensation system according to claim 1, further comprising a subject matter position sensing means configured for monitoring and transmitting data to the processing system relating to movement of the subject matter;

wherein the processing system is communicatively coupled to the subject matter position sensing means for receiving and processing the data from the subject matter position sensing means and transmitting signals to the remote camera head to pan and tilt the camera head to compensate for changes in the position of the subject matter.

5. The automated camera head pan and tilt compensation system according to claim 1, further comprising steerable wheels coupled to the dolly and configurable in one or more modes for facilitating movement of the dolly.

6. The automated camera head pan and tilt compensation system according to claim 1, further comprising a leveling mechanism supported on the dolly and configured to maintain the remote camera head parallel to a frame of the dolly as a height of the remote camera head is varied with respect to the frame of the dolly.

7. The automated camera head pan and tilt compensation system according to claim 1, the sensors comprising an angular sensing device for sensing angular rotation of the dolly and an accelerometer for sensing lateral translations of the dolly.

8. The automated camera head pan and tilt compensation system according to claim 1, the processing system further configured for establishing an initial position of the dolly by taking sensor readings when the dolly has been placed in a known configuration in front of the subject matter and receiving a distance input from an operator.

9. The automated camera head pan and tilt compensation system according to claim 1, wherein the movement of the dolly includes dance floor moves.

10. The automated camera head pan and tilt compensation system according to claim 1, further comprising means by which the compensation of tilt and pan of the camera head may be adjusted by a user.

11. A method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly, comprising:

defining a position of the remote camera head coupled to the dolly and a position of a subject matter relative to the dolly;

generating sensor data related to a direction and travel of the dolly;

continuously updating a position of the dolly; and

transmitting signals to the remote camera head to pan and tilt the remote camera head to compensate for movements of the dolly so that regardless of a movement of the dolly, the remote camera head maintains its field of view generally centered on the position of the subject matter.

12. The method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly according to claim 11, further comprising treating the dolly as an imaginary remote camera head crane with the remote camera head of the imaginary remote camera head crane located at the actual position of the remote camera head on the dolly.

13. The method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly according to claim 12, further comprising converting the sensor data to swing, boom and telescope movements of the imaginary remote camera head crane to assist in determining the automatic pan and tilt compensation for the remote camera head on the dolly.

14. The method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly according to claim 11, further comprising:

generating data related to movement of the subject matter;

continuously updating a position of the subject matter; and

transmitting signals to the remote camera head to pan and tilt the remote camera head to compensate for changes in the position of the subject matter so that regardless of the movement of the subject matter, the remote camera head maintains its field of view generally centered on the position of the subject matter.

15. The method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly according to claim 11, further comprising configuring steerable wheels coupled to the dolly into one or more modes for facilitating movement of the dolly.

16. The method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly according to claim 11, further comprising maintaining the remote camera head level with respect to a frame of the dolly in response to changes in a height of the remote camera head with respect to the frame of the dolly.

17. The method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly according to claim 11, the step of generating sensor data related to a direction and travel of the dolly further comprising sensing an angular rotation of the dolly and sensing lateral translations of the dolly.

18. The method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly according to claim 11, further comprising establishing an initial position of the dolly by taking sensor readings when the dolly has been placed in a known configuration in front of the subject matter, and receiving a distance input from an operator.

19. The method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly according to claim 11, wherein the movement of the dolly includes dance floor moves.

20. The method for automatically compensating the pan and tilt of a remote camera head coupled to a dolly according to claim 11, further comprising providing user-adjustable means by which the compensation of tilt and pan of the remote camera head may be adjusted.