System and method for automatic calibration of vehicle position determining device in a traffic system

1. A system for automatic calibration of a position determining device in a traffic system comprising:

at least one position determining device;

at least one image capturing device;

a matching and tagging module;

an image analysis module; and

a calibration module;

wherein, the position determining device detects a vehicle in violation of a traffic rule and activates the image capturing device to capture images of the vehicle;

the vehicle is matched and tagged in the images according to vehicle-related information detected by the position determining device by the matching and tagging module;

the image analysis module analyses a plurality of images selected from the images of the vehicle to obtain an analysis result;

the analysis result is compared with the vehicle-related information detected by the position determining device by a processor to obtain a comparison result; and

the calibration module is configured to calibrate the position determining device according to the comparison result wherein,

the plurality of images comprises a first image captured at first time point right before a to-be-analysed image captured at a second time point and a second image captured at a third time point right after the to-be-analysed image;

the image analysis module analyses a first pixel difference between the first image and the to-be-analysed image, and a second pixel difference between the second image and the to-be-analysed image to determine an area with a largest pixel difference on the to-be-analysed image, the first image and the second image; and the image analysis module marks the area as a precise location of the vehicle on the to-be-analysed image, the first image and the second image; and

the image analysis module is configured to calculate a difference in the precise location of the vehicle on the to-be-analysed image, the first image and the second image to determine a relative movement of the vehicle between the first time point, the second time point and the third time point.

2. The system of claim 1 wherein, the vehicle-related information detected by the position determining device comprises a difference in positions of the vehicle at the first time point, the second time point and the third time point.

3. The system of claim 2 wherein,

the vehicle-related information detected by the position determining device further comprises position information of the vehicle relative to the position determining device, a velocity of the vehicle, a heading direction of the vehicle, and a shape of the vehicle.

4. The system of claim 1 wherein;

the first image, the to-be-analysed image and the second image are consecutive images captured by the image capturing device.

5. A method for automatic calibration of a position determining device of a traffic system comprising:

activating an image capturing device to capture images of a vehicle in violation of a traffic rule when a position determining device detects a vehicle is in violation of the traffic rule;

matching and tagging, by a matching and tagging module, the vehicle in the images according to vehicle-related information detected by the position determining device;

analysing, by an image analysis module, a plurality of images selected from the images of the vehicle captured by the capturing device to obtain an analysis result, wherein the image analysis module analyses a pixel difference between adjacent images to determine an area with a largest pixel difference as a precise location of the vehicle on each image, and the image analysis module is configured to calculate a difference in the precise location of the two adjacent images to obtain the analysis result; and

comparing, by a processor, the analysis result with the vehicle-related information detected by the position determining device to obtain a comparison result;

wherein, if the analysis result is different than the vehicle-related information, calibrating the position determining device by a calibration module according to the comparison result;

wherein, the matching and tagging of the vehicle is performed after the precise location of the vehicle on each image is determined.

6. The method of claim 5 , wherein,

the plurality of images comprises a first image captured at a first time point right before a to-be-analysed image captured at a second time point and a second image captured at a third time point right after the to-be-analysed image;

the method further comprises

comparing the first image and the to-be-analysed image to obtain a first pixel difference between the first image and the to-be-analysed image and comparing the second image and the to-be-analysed image to obtain a second pixel difference between the second image and the to-be-analysed image to determine an area with a largest pixel difference on the to-be-analysed image, the first image and the second image;

marking the area as a precise location of the vehicle on the to-be-analysed image, the first image and the second image; and

calculating a difference in the precise location of the vehicle on the to-be-analysed image, the first image and the second image to determine a relative movement of the vehicle between the first time point, the second time point and the third time point.

7. The method of claim 6 wherein,

the vehicle-related information detected by the position determining device comprises a position of the vehicle determined by the position determining device at the first time point, the second time point and the third time point.

8. The method of claim 7 wherein,

the vehicle-related information detected by the position determining device further comprises position information of the vehicle relative to the position determining device, a velocity of the vehicle, a heading direction of the vehicle, and a shape of the vehicle.

9. The method of claim 6 wherein,

the first image, the to-be-analysed image and the second image are consecutive images captured by the image capturing device.

10. The method of claim 5 wherein, the position determining device comprises at least one radar.

11. The method of claim 5 wherein, the image capturing device comprises at least one camera.