A method for detecting vehicles in front of an expressway
A technology for vehicles ahead and highways, applied in the field of vehicle detection in front of highways, can solve the problems of unstable measurement values and lack of measurement directions, and achieve the effects of stable calculation results and simple and effective methods.
Inactive Publication Date: 2018-08-03
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 a method for detecting a vehicle in front of an expressway, which comprises the following steps: performing multi-scale transformation on a collected original image of the vehicle in front of the expressway to obtain a reduced image; and performing edge detection on the reduced image to obtain a contour of the vehicle outline. Detection result image; label the detection result image of the vehicle outline to obtain the labelled vehicle; scan the labelled image and calculate the outer rectangle of each labelled vehicle. Calculate the outer rectangle parameter of each labelled vehicle according to the obtained outer rectangle. Compared with the existing method, the present invention not only has stable calculation results, but also has a simple and effective method, and can effectively reflect the driving condition of the vehicle ahead through the parameters of the external rectangle.
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