Expressway front vehicle detection method
A technology for vehicles in front and expressways, applied in the detection field of vehicles in front of expressways, can solve problems such as unstable measurement values and lack of measurement directions, and achieve stable calculation results and simple and effective methods
Inactive Publication Date: 2015-09-16
CHANGAN UNIV
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Problems solved by technology
However, due to the lack of determination of the measurement direction in this method, the measured length and width vary with the direction of the rectangle, and the measured value is unstable.
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[0048] Refer to attached figure 1 , following the technical scheme of the present invention, the method of this embodiment is carried out according to the following steps:
[0049] Step 1: Perform multi-scale transformation on the collected original image of the vehicle in front of the expressway. The shrinking algorithm based on the local maximum is used to get the reduced image, which can not only reduce the amount of image data, speed up the processing speed, but also effectively avoid the interference of noise. As shown in Figure 5(a).
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The invention discloses an expressway front vehicle detection method. The method includes the following steps that: multi-scale transformation is performed on acquired original images of expressway front vehicles, so that contracted images can be obtained; edge detection is performed on the contracted images, so that detection result images of vehicle contours can be obtained; the detection result images of the vehicle contours are numbered, so that numbered vehicles can be obtained; the numbered images are scanned, and the external rectangle of each numbered vehicle is calculated, and the parameters of the external rectangle of each numbered vehicle can be calculated according to the obtained external rectangle. The expressway front vehicle detection method has the advantages of stable calculation results as well as being concise and effective, and can effectively reflect the driving conditions of the front vehicles through the parameters of the external rectangles.
Description
Technical field: [0001] The invention relates to a method for detecting road vehicles, in particular to a method for detecting vehicles in front of an expressway. Background technique: [0002] By the end of 2013, the national highway mileage reached 104,400 kilometers, ranking first in the world. China's expressway construction is now in a period of rapid development. However, compared with other grades of roads, or compared with other countries' expressways, the safety situation of my country's expressways is not optimistic, and the accident rate and accident severity are relatively high. . It is foreseeable that the safety situation of expressways will become more and more serious with the development of economy and society, as well as the increase of car ownership and expressway mileage. [0003] Therefore, it is of great significance to design a vehicle early warning system for expressways. At present, countries including the United States, Israel, and South Korea are...
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IPC IPC(8): G06K9/00G06K9/46G06K9/60
CPCG06V20/584G06V10/44G06V10/20
Inventor 王卫星曹霆
Owner CHANGAN UNIV