MULTIPLE VIEW TRANSPORTATION IMAGING SYSTEMS

• US 20130236063A1
• Filed: 03/07/2012
• Published: 09/12/2013
• Est. Priority Date: 03/07/2012
• Status: Active Grant

• Current Assignee: Conduent Business Services, LLC (Conduent, Inc.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Shin, Helen HaeKyung, Wu, Wencheng, Wade, Thomas F., Paul, Peter, Bernal, Edgar, Lee, Robert P.
• Granted Patent: US 8,731,245 B2
• Time in Patent Office: Days
• US Class Current: 382/105
• CPC Class Codes: G08G 1/017 identifying vehicles G08G1/015, G08G1/054 take precedence
• CPC Class Codes: G08G 1/04 using optical or ultrasonic detectors

Abstract

A camera may be positioned to have a direct view of on-coming vehicle traffic from a first perspective. Additionally, a reflective surface, such as a mirror, may be positioned within the viewing area of the same camera to provide the camera with a reflected view of vehicle traffic from a second perspective. The images recorded by the camera may then be received by a computing device. The computing device may separate the images into a direct view region and a reflected view region. After separation, the regions may be analyzed independently and/or combined with other regions, and the analyzed data may be stored. The regions may be analyzed to determine various vehicle characteristics, including, but not limited to, vehicle speed, license plate identification, vehicle occupancy, vehicle count, and vehicle type.

Claims

1. A method of monitoring traffic using a single camera device, the method comprising:

capturing a first image of a vehicle using the camera device, wherein the first image displays the vehicle from a first optical perspective; and

capturing a second image of the vehicle using the camera device, wherein the second image displays the vehicle from a second optical perspective, wherein;

the second optical perspective differs from the first optical perspective; and

the second optical perspective is obtained via reflection off of a surface external to the camera device; and

determining characteristics of the vehicle by analyzing the first image and the second image.

2. The method of claim 1, wherein the first optical perspective is obtained via a direct view of the vehicle by the camera device.

3. The method of claim 1, wherein:

the first optical perspective comprises one of a vertical perspective and a lateral perspective of the vehicle; and

the second optical perspective comprises a different one of a vertical perspective and a lateral perspective of the vehicle.

4. The method of claim 1, wherein:

the first optical perspective provides the camera device with a view of one of a top portion, a front portion, a rear portion, and a side portion of the vehicle; and

the second optical perspective provides the camera device with a view of a different one of a top portion, a front portion, a rear portion, and a side portion of the vehicle.

5. The method of claim 1, wherein the surface is positioned partially within a field of view of the camera device such that:

the first optical perspective is obtained from a first subset of the field of view that is unaffected by the surface; and

the second optical perspective is obtained from a second subset of the field of view that reflects off of the surface, wherein the second subset differs from the first subset.

6. The method of claim 5, wherein capturing the first image and capturing the second image comprise:

capturing a single image at a single time such that the single image comprises a first region displaying the vehicle from the first optical perspective and a second region displaying the vehicle from the second optical perspective.

7. The method of claim 5, wherein:

capturing the first image comprises capturing the first image at a first time; and

capturing the second image comprises capturing the second image at a second time, wherein the second time differs from the first time.

8. The method of claim 7, wherein the camera device and the surface maintain static positions between the capturing of the first image and the capturing of the second image.

9. The method of claim 1, further comprising:

capturing the first image at a first time;

capturing the second image at a second time, wherein the second time differs from the first time; and

causing the surface to change from one of a reflective state to a transparent state and a transparent state to a reflective state such that;

the first optical perspective is obtained via a direct view through the surface during the first time; and

the second optical perspective is obtained via reflection off of the surface during the second time.

10. The method of claim 9, wherein the camera device and the surface maintain static positions between the capturing of the first image and the capturing of the second image.

11. The method of claim 1, further comprising:

capturing the first image at a first time;

capturing the second image at a second time, wherein the second time differs from the first time; and

causing one or more of the camera device or the surface to move such that;

the first optical perspective is obtained via a view that is unaffected by the surface during the first time; and

the second optical perspective is obtained via reflection off of the surface during the second time.

12. The method of claim 1, wherein determining characteristics of the vehicle comprises:

determining one of a license plate identification, a passenger configuration, a vehicle classification, and a speed of the vehicle by analyzing the first image; and

determining a different one of a license plate identification, a passenger configuration, a vehicle classification, and a speed of the vehicle by analyzing the second image.

13. The method of claim 1, wherein determining characteristics of the vehicle comprises:

determining a characteristic of the vehicle by comparing the first image to the second image, wherein the characteristic of the vehicle comprises one of a license plate identification, a passenger configuration, a vehicle classification, and a speed of the vehicle.

14. The method of claim 13, further comprising:

determining a first position of the vehicle at a first time by analyzing the first image;

determining a second position of the vehicle at a second time by analyzing the second image; and

determining the speed of the vehicle by comparing the first position of the vehicle at the first time to the second position of the vehicle at the second time.

15. The method of claim 1, wherein determining characteristics of the vehicle comprises:

determining a first estimation of a characteristic of the vehicle by analyzing the first image, wherein the characteristic of the vehicle comprises one of a license plate identification, a passenger configuration, a vehicle classification, and a speed of the vehicle;

determining a second estimation of the characteristic of the vehicle by analyzing the second image; and

determining a third estimation of the characteristic of the vehicle by combining the first estimation and the second estimation.

16. The method of claim 1, wherein:

capturing the first image comprises illuminating the vehicle using a first illumination device that illuminates the vehicle when viewed from the first optical perspective; and

capturing the second image comprises illuminating the vehicle using a second, different illumination device that illuminates the vehicle when viewed from the second optical perspective.

17. The method of claim 1, further comprising:

illuminating the vehicle using a plurality of illumination devices surrounding the camera device such that the plurality of illumination devices emit a combined path of illumination that is substantially coaxial with a field of view of the camera device.

18. A method of monitoring traffic using a single camera device, the method comprising:

capturing a first image of a vehicle at a first time using the camera device, wherein the first image displays a first portion of the vehicle from a first optical perspective; and

capturing a second image of the vehicle at a second time using the camera device, wherein the second image displays a second portion the vehicle from a second optical perspective, wherein;

the second time differs from the first time; and

the second portion of the vehicle differs from the first portion of the vehicle;

causing a surface external to the camera device to change from one of a reflective state to a transparent state and a transparent state to a reflective state such that;

the first optical perspective is obtained via a direct view through the surface during the first time; and

the second optical perspective is obtained via reflection off of the surface during the second time;

wherein the camera device and the surface maintain static positions between the capturing of the first image and the capturing of the second image;

determining one of a license plate identification and a speed of the vehicle by analyzing the first image;

determining a different one of a license plate identification and a speed of the vehicle by analyzing the second image; and

associating the determined license plate identification of the vehicle with the determined speed of the vehicle.