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Calibrating method of pick-up device under condition of traffic monitering

A camera calibration and camera technology, applied in the field of intelligent transportation, to achieve the effect of simple, pertinence and good versatility

Inactive Publication Date: 2005-01-12
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies of the existing camera calibration technology, to provide a new camera calibration method in the traffic monitoring environment, which is easy to implement, can fully ensure the pertinence or versatility in the traffic monitoring environment, and meet the needs of intelligent traffic information video Actual needs of accurate extraction of traffic parameters in monitoring system

Method used

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  • Calibrating method of pick-up device under condition of traffic monitering
  • Calibrating method of pick-up device under condition of traffic monitering
  • Calibrating method of pick-up device under condition of traffic monitering

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Embodiment Construction

[0017] In order to better understand the technical solution of the present invention, a further detailed description will be made below in conjunction with the accompanying drawings and embodiments.

[0018] 1) Selection of calibration target and establishment of relevant coordinate system:

[0019] A calibration target is selected in a traffic scene, that is, a set of three parallel lines with a known distance from each other and a straight line with a known slope intersecting the set of parallel lines. They are respectively represented as a, b, c, d on the actual road surface, the straight line a, b, c represents three parallel lines, the straight line d intersects them, and the intersection points of the three parallel lines and the straight line d are respectively represented as A, O, B, such as figure 1 shown. Here, the slope of the straight line d has been measured in advance, expressed as m, and the distance between two adjacent parallel lines in the straight lines a,...

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Abstract

The method includes following steps: the three parallel edges whose interval are known and a straight line, intersecting with parallel line, whose slop is known are selected from traffic scene to be as the calibration target; each projection straight line corresponding to them in the image is found and the intersection coordinates of each projection line is figured out; according to the data, the focal length, direction and location parameters about the video cameral is figured out. The invention can use the traffic scene such as zebra crossing and traffic lane including the two side of road, and combine the distribution information about a lot of special straight line in road surface to determine relevant parameter of the video camera.

Description

technical field [0001] The invention relates to a camera calibration method in a traffic monitoring environment, which is mainly used for obtaining camera orientation parameters and focal lengths in a traffic monitoring environment, and provides a basic guarantee for real-time and accurate detection of various traffic information based on video. It belongs to the field of intelligent transportation technology. Background technique [0002] The automatic collection and processing of traffic information through the traffic intelligent monitoring system is one of the most basic elements in the Intelligent Transportation System (ITS) of various countries and even the world. With the development of sensor technology, communication and network technology, pattern recognition, image processing and With the development of high technology such as computer vision, intelligent traffic information monitoring technology has also made great progress. Generally speaking, traffic status an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/225
Inventor 陈兆学施鹏飞
Owner SHANGHAI JIAO TONG UNIV
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