NOCTURNAL VEHICLE COUNTING METHOD BASED ON MIXED PARTICLE FILTER

• US 20160364618A1
• Filed: 06/09/2015
• Published: 12/15/2016
• Est. Priority Date: 06/09/2015
• Status: Abandoned Application

• Current Assignee: National Chung-Shan Institute of Science and Technology
• Original Assignee: National Chung-Shan Institute of Science and Technology
• Inventors: HUANG, SHIH-SHINH, LU, CHIH-HUNG, CHIEN, SHIH-CHE
• Application Number:
  US14/734,064
• Publication Number:
  US 20160364618A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06V 10/28 Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns
• CPC Class Codes: G06V 20/54 of traffic, e.g. cars on the road, trains or boats
• CPC Class Codes: G06V 20/584 of vehicle lights or traffic lights
• CPC Class Codes: G06V 2201/08 Detecting or categorising vehicles

Abstract

A nocturnal vehicle counting method based on a mixed particle filter is introduced in that, in a nocturnal environment, a rear lamp of a vehicle is the most remarkable feature of the vehicle and forms a high-brightness region of an image of the vehicle. The method involves detecting the high-brightness region of an image of the vehicle to thereby detect the rear lamp of the vehicle. The method further involves operating a particle filter structure which, coupled with the detection of a moving high-brightness region, can detect and track the rear lamp of the vehicle simultaneously, thereby enhancing competitiveness and incurring low costs.

Claims

1. A nocturnal vehicle counting method based on a mixed particle filter, adapted to enhance accuracy in vehicle detection by image processing, the method comprising the steps of:

capturing a first image with an image device, followed by performing a color recognition of the first image, so as to obtain a first image signal;

capturing a second image at a next point in time with the image device, followed by performing a color recognition of the second image, so as to obtain a second image signal; and

comparing the second image signal with the first image signal, followed by fetching a rear lamp feature of the vehicle, so as to obtain a vehicle passage target image with an image particle mixing technique.

2. The nocturnal vehicle counting method based on a mixed particle filter of claim 1, wherein the image device is one of a CCD and a CMOS.

3. The nocturnal vehicle counting method based on a mixed particle filter of claim 1, wherein the color recognition is performed for use in image signal recognition according to a single color.

4. The nocturnal vehicle counting method based on a mixed particle filter of claim 3, wherein the color recognition is sorted by a weight feature of an image in a single color so as to obtain an image template.

5. The nocturnal vehicle counting method based on a mixed particle filter of claim 1, wherein the image particle mixing technique is for use in determining a passage feature of a moving vehicle.

6. The nocturnal vehicle counting method based on a mixed particle filter of claim 1, further comprising the step of operating a processing device.