Recognition method of vehicle region

A recognition method and vehicle area technology, applied in traffic control systems, instruments, traffic control systems of road vehicles, etc.

Inactive Publication Date: 2005-01-12
CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD +1
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Problems solved by technology

In order to solve the problem of urban traffic congestion, many developed countries and developing countries are building a large number of road infrastructures, but due to the rapid increase in the nu

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  • Recognition method of vehicle region

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Embodiment Construction

[0038] At present, the mathematical algorithms for judging whether a point is contained by a polygon include ray method, arc length method, corner method, symbol method and grid method. The corner method and the symbol method are suitable for the area where the boundary is a continuous function, and the algorithm is complex, and it is difficult to meet the real-time requirements; although the ray method is simple and practical, because the ray method has its limitations, that is, when the ray passes through the inflection point of the polygon or a certain On the other hand, using the ray method will produce wrong judgment results; although the grid method has the outstanding advantages of data structure, its data generation accuracy depends on the size of the pixel. When dividing, it will encounter the storage problem of a huge amount of data, which is difficult to handle due to the limited storage space of general microcomputers. Among them, the arc length method requires tha...

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Abstract

The invention modifies arc length mathod in mathematical algorithm to determine whether a point is included inside a polygon. The method is realized through a main program for identifying secton and subprograms, which are embedded into TopMap ActiveX software of module type geographical information system. the main program executes following tasks: calling in map, inputting coordinate of vehicle into electronic map of the city, determing crowded area. subprograms are called when the main program is recognizing and determining crowded area. the invention is applicable to traffic control.

Description

technical field [0001] The invention relates to an area identification method, in particular to a vehicle area identification method using Global Positioning System technology (Globel Position System, GPS for short), which is applied to traffic demand management. Background technique [0002] The emergence of automobiles has made people's travel and cargo transportation faster and more convenient, but while it has brought huge benefits to mankind, it has also caused a series of problems, such as urban traffic congestion and the resulting traffic accidents, traffic accidents Then further exacerbate the traffic congestion and even cause traffic jams. In order to solve the problem of urban traffic congestion, many developed countries and developing countries are building a large number of road infrastructures. However, due to the rapid increase in the number of motor vehicles and the population cluster effect in the process of urbanization, it is...

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Application Information

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IPC IPC(8): G01C21/26G08G1/123G09B29/10
Inventor 陈弘李广霞
Owner CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD
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