Systems and methods of creating a virtual window

• US 20090290033A1
• Filed: 03/31/2009
• Published: 11/26/2009
• Est. Priority Date: 11/16/2007
• Status: Abandoned Application

• Current Assignee: Blackhawk Imaging LLC
• Original Assignee: Tenebraex Corporation
• Inventors: Cargill, Ellen, Purcell, Dennis W., Jones, Peter W.J.
• Application Number:
  US12/384,209
• Publication Number:
  US 20090290033A1
• Time in Patent Office: Days
• US Class Current: 348/218.1
• CPC Class Codes: G08B 13/19693 using multiple video sources viewed on a single or compound screen
• CPC Class Codes: H04N 23/45 for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images
• CPC Class Codes: H04N 23/698 for achieving an enlarged field of view, e.g. panoramic image capture
• CPC Class Codes: H04N 23/70 Circuitry for compensating brightness variation in the scene
• CPC Class Codes: H04N 23/90 Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
• CPC Class Codes: H04N 23/951 by using two or more images to influence resolution, frame rate or aspect ratio
• CPC Class Codes: H04N 25/41 Extracting pixel data from a plurality of image sensors simultaneously picking up an image, e.g. for increasing the field of view by combining the outputs of a plurality of sensors
• CPC Class Codes: H04N 5/262 Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
• CPC Class Codes: H04N 5/2624 for obtaining an image which is composed of whole input images, e.g. splitscreen

Abstract

The systems and methods described herein provide imaging systems with multiple imaging sensors arranged in an optical head that create a seamless panoramic view by reducing parallax distortion and adaptively adjusting exposure levels of the recorded images. In particular, an optical head is described with a stacked configuration of CCD imaging sensors in which charge is transferred from a sensor to a processor beginning with an array of photosensitive elements nearest another sensor.

Claims

1. A system for imaging a scene, comprising:

an optical head including a plurality of imaging sensors arranged in a plurality of rows, each row disposed substantially vertically of an adjacent row and having one or more imaging sensors, wherein;

a respective one of said imaging sensors in a first row has an optical axis lying substantially on a first plane and a respective one of said imaging sensors in a second row has an optical axis lying substantially on a second plane such that the first plane is substantially parallel to the second plane and the number of imaging sensors in the first row is different from the number of imaging sensors in the second row,

an optical axis of a first imaging sensor in a selected row intersects an optical axis of a second imaging sensor in the selected row different from the first imaging sensor; and

a processor connected to the optical head and configured with circuitry for;

receiving imaging sensor data from each imaging sensor, and

generating an image of a scene by assembling the received imaging sensor data.

2. The system of claim 1, wherein each imaging sensor is capable of imaging an associated horizontal range of the scene, and an associated horizontal range of a first imaging sensor in a row overlaps an associated horizontal range of a second imaging sensor in the row different from the first imaging sensor.

3. The system of claim 1, wherein each imaging sensor is capable of imaging an associated horizontal range of the scene, and the intersection of a plurality of horizontal ranges associated with a plurality of imaging sensors forms a continuous horizontal range of the scene.

4. The system of claim 3, wherein the continuous horizontal range comprises a 180-degree view of the scene.

5. The system of claim 1, wherein a bottom row has two imaging sensors, a middle row has one imaging sensor, and a top row has two imaging sensors.

6. The system of claim 5, wherein a rightmost imaging sensor in the bottom row is disposed substantially directly below the one imaging sensor in the middle row, and the one imaging sensor in the middle row is disposed substantially directly below the leftmost imaging sensor in the top row.

7. The system of claim 5, wherein the bottom, middle and top rows are horizontally centered with respect to each other.

8. The system of claim 1, wherein each imaging sensor is a charge-coupled device having columns of photosensitive elements.

9. The system of claim 8, further comprising output amplifier circuitry configured for receiving, column-wise, charge accumulated at the photosensitive elements in each sensor;

and generating imaging sensor data.

10. The system of claim 9, wherein the output amplifier circuitry receives charge from each imaging sensor in a row from a column of photosensitive elements nearest to another imaging sensor in the row.

11. The system of claim 1, wherein each row has an associated plane containing the optical axes of the imaging sensors in the row such that the associated plane is parallel to the analogously-defined plane associated with a different row.

12. A system for imaging a scene, comprising:

an optical head including a plurality of imaging sensors, each imaging sensor disposed substantially vertically of another imaging sensor along a vertical axis and each oriented at a different offset angle about the vertical axis, wherein each imaging sensor has an optical axis that forms a non-zero tilt angle with respect to the vertical axis, and wherein each of the non-zero tilt angles is substantially identical; and

a processor connected to the optical head configured with circuitry for

receiving imaging sensor data from each imaging sensor, and

assembling the received imaging sensor data into an image of a scene.

13. The system of claim 12, wherein each imaging sensor is disposed substantially vertically adjacent to another imaging sensor along a vertical axis.

14. The system of claim 13, wherein a difference in offset angle between two substantially vertically adjacent imaging sensors is the same for any other two substantially vertically adjacent imaging sensors.

15. The system of claim 12, wherein the tilt angle is about 10 degrees below horizontal.

16. The system of claim 12, wherein the intersection of a plurality of horizontal ranges associated with a plurality of imaging sensors forms a continuous horizontal range of the scene.

17. The system of claim 16, wherein the continuous horizontal range comprises a 180-degree view of the scene.