Apparatus and method for measuring queue length of vehicles
First Claim
1. An apparatus for measuring a queue length of vehicles, comprising:
- a camera for acquiring the rear image of vehicles on the road;
an image converter for converting analog image signals corresponding to images acquired by the camera into digital image signals; and
a control unit for extracting characteristics of vehicles from the converted digital images, calculating positions of vehicles on the road on the basis of the extracted characteristics and calculating a queue length of vehicles on the road on the basis of the calculated positions of vehicles.
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Abstract
In an apparatus and a method for measuring a queue length of vehicles, by installing a camera toward a direction same with a proceeding direction of vehicles on the road, photographing images of the road at the rear of vehicles and measuring a queue length of vehicles, it is possible to measure a queue length of vehicles accurately. The apparatus includes a camera for photographing the rear of vehicles on the road; an image converter for converting analog image signals corresponding to images photographed by the camera into digital image signals; and a control unit for extracting characteristics of vehicles from the converted digital images, calculating positions of vehicles on the road on the basis of the extracted characteristics and calculating a queue length of vehicles on the road on the basis of the calculated positions of vehicles.
27 Citations
18 Claims
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1. An apparatus for measuring a queue length of vehicles, comprising:
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a camera for acquiring the rear image of vehicles on the road;
an image converter for converting analog image signals corresponding to images acquired by the camera into digital image signals; and
a control unit for extracting characteristics of vehicles from the converted digital images, calculating positions of vehicles on the road on the basis of the extracted characteristics and calculating a queue length of vehicles on the road on the basis of the calculated positions of vehicles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for measuring a queue length of vehicles, comprising:
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photographing the rear of vehicles on the road;
removing noise from the photographed images;
extracting characteristics of vehicles from the noise-removed images and tracing the extracted characteristics; and
determining the characteristics as stopped vehicles when moving trace of the characteristics is smaller than a predetermined size and calculating a distance from a position of the characteristics of the stopped vehicle to a reference position of a traffic lane on the road. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification