Surveillance system

• US 9,065,996 B2
• Filed: 03/14/2008
• Issued: 06/23/2015
• Est. Priority Date: 03/15/2007
• Status: Active Grant

• Current Assignee: Mobotix AG (Konica Minolta Inc.)
• Original Assignee: Mobotix AG (Konica Minolta Inc.)
• Inventors: Borchers, Klaus, Hubrich, Ralf
• Primary Examiner(s): Dailey, Thomas
• Assistant Examiner(s): TRAN, NAM T
• Application Number:
  US12/531,185
• Publication Number:
  US 20100141733A1
• Time in Patent Office: 2,657 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/60 using transform coding
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression
• CPC Class Codes: H04N 19/91 Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
• CPC Class Codes: H04N 23/58 Means for changing the camera field of view without moving the camera body, e.g. nutating or panning of optics or image sensors
• CPC Class Codes: H04N 23/661 Transmitting camera control signals through networks, e.g. control via the Internet
• CPC Class Codes: H04N 23/698 for achieving an enlarged field of view, e.g. panoramic image capture
• CPC Class Codes: H04N 7/183 for receiving images from a single remote source

Abstract

The invention relates to a surveillance system having an image recording means for recording optically distorted images and having a transmission means for transmission of image information from the image recording means to a reproduction means which reproduces, in an undistorted form, image details of the images which have been recorded with optical distortion. In this connection, it is provided that the transmission means is designed for detail transmission of distorted images and for joint transmission of additional information, which allows image detail distortion to be corrected, in order to allow distortion correction in the reproduction means.

Claims

1. Surveillance system, comprising:

an image recording means for recording;

moving, optically distorted, digital, wide angle images comprising a plurality of pixels,

a transmission means for transmitting image information from the image recording means to a reproduction means, said reproduction means reproducing the optically distorted images in a manner correcting distortion,

the transmission means comprising;

means for storing geometrical distortion correction information,

the transmission means further comprising means for repeated transmission of geometrical distortion correction information and being adapted to receive a pan, tilt, zoom target parameter, to determine at least one region of interest according to the pan, tilt parameters; and

to combine pixels depending on the zoom parameter;

the transmission means being further adapted to provide an image stream based on the at least one region of interest for a differentially compressed transmission and to transmit the image stream together with an additional information allowing for geometrical distortion correction of the at least one region of interest to the reproduction means, so as to allow a distortion correction of the at least one region of interest in the reproduction means using a geometrical distortion correction and the additional information.

2. The surveillance system as claimed in claim 1, characterized in that the image recording means has an addressable image sensor, comprising an image recording sensor which can be addressed line-by-line and/or row-by-row, in particular a complimentary metal-oxide semiconductor sensor.

3. The surveillance system as claimed in claim 2, characterized in that the image recording means is for digital recording of optically distorted images.

4. The surveillance system as claimed in claim 2, characterized in that the image recording means is equipped with at least one wide-angle objective, in particular with a viewing angle of more than 90°

, in particular a fish-eye objective.

5. The surveillance system as claimed in claim 1, characterized in that the image recording means is equipped with at least one wide-angle objective, in particular with a viewing angle of more than 90°

, in particular a fish-eye objective.

6. The surveillance system as claimed in claim 1, characterized in that the image recording means is for repeated recording of moving images, in particular with an image repetition frequency of ≧

1 Hz.

7. The surveillance system as claimed in claim 6, wherein the image repetition frequency is ≧

5 Hz.

8. The surveillance system as claimed in claim 6, wherein the image repetition frequency is ≧

10 Hz.

9. The surveillance system as claimed in claim 1, characterized in that the image recording means is equipped with at least 1 megapixels for digital recording of high-resolution images.

10. The surveillance system as claimed in claim 1, characterized in that the transmission means is for transmission of image information via a limited-bandwidth channel, in particular local area network, wireless local area network or by one of the following radio signals:

BLUETOOTH, universal mobile telecommunications system and global system for mobile communications.

11. The surveillance system as claimed in claim 1, characterized in that the transmission means is for transmission of compressed image information from the image recording means.

12. The surveillance system as claimed in claim 1, characterized in that the reproduction means is provided with a monitor, in particular a computer monitor in a control center.

13. The surveillance system as claimed in claim 12, wherein the control center comprises a control center for monitoring of images from more than one image recording means.

14. The surveillance system as claimed in claim 1, characterized in that the means for storing is further for storage and/or protection of the transmitted image information and of the additional information which allows image detail distortion to be corrected, or for storage of images whose distortion has been corrected is provided between the transmission means and the reproduction means.

15. The surveillance system as claimed in claim 1, characterized in that characteristic variables which indicate an image detail are transmitted from the reproduction means, the reproduction means comprising a control center, to the image recording means via the transmission means.

16. The surveillance system as claimed in claim 1, characterized in that the transmission means is for compressed transmission of distorted images, in particular differences between compressed image data streams, which differences are obtained by subtraction between successively obtained images.

17. The surveillance system as claimed in claim 1, characterized in that the transmission means is for simultaneous transmission of a plurality of image details from one and the same image recording means.

18. The surveillance system as claimed in claim 1, characterized in that the transmission means is for joint transmission of variables which characterize the position of the image detail in the overall image.

19. The surveillance system as claimed in claim 1, characterized in that the transmission means is for transmission of image details in the form of sectors, and/or rectangular image details.

20. The surveillance system as claimed in claim 1, further comprising a driver.

21. The surveillance system as claimed in claim 1, wherein the image recording means is equipped with at least 2 megapixels for digital recording of high-resolution images.

22. The surveillance system as claimed in claim 1, wherein the image recording means is equipped with at least 3 megapixels for digital recording of high-resolution images.

23. The surveillance system as claimed in claim 1, wherein the pan, tilt, zoom target parameter is received by the transmission means from the reproduction means.