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Road information extraction device based on two-dimensional image and depth information and road crack information detection method based on same

A technology of two-dimensional images and depth information, which can be used in measurement devices, optical devices, and material analysis by optical means. , the effect of reducing the false positive rate

Active Publication Date: 2012-10-03
HARBIN INST OF TECH
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Problems solved by technology

[0009] In order to solve the problems of high misjudgment rate and low recognition rate in existing road surface detection technology relying solely on two-dimensional grayscale image information or pure three-dimensional depth information for crack detection, the present invention proposes a method based on two-dimensional image and depth information Pavement information extraction device and method for detecting pavement crack information using the device

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  • Road information extraction device based on two-dimensional image and depth information and road crack information detection method based on same
  • Road information extraction device based on two-dimensional image and depth information and road crack information detection method based on same
  • Road information extraction device based on two-dimensional image and depth information and road crack information detection method based on same

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specific Embodiment approach 1

[0034] Specific implementation mode one: see figure 1 , 2and 4 describe this embodiment. The road surface information extraction device based on two-dimensional images and depth information described in this embodiment includes a road surface depth information collection component 3, a two-dimensional image collection component 4 and a trigger control module 5; the road surface depth information collection component 3 is fixed on the bottom of the car body, The road surface depth information collection component 3 is composed of a structured light laser 3-2 and an area array camera 3-1. The structured light strip emitted by the structured light laser 3-2 is projected onto the road surface, and the trigger control module 5 is used to collect the speed information of the vehicle. , and output a trigger signal to the area array camera 3-1 and the line array camera 4-1 at the same time according to the speed information, the area array camera 3-1 is used to collect the structured...

specific Embodiment approach 2

[0041] Embodiment 2: The difference between this embodiment and the road surface information extraction device based on two-dimensional images and depth information described in Embodiment 1 is that the road surface information extraction device described in this embodiment also includes an image acquisition component 2, The image collection component 2 is used to collect the information collected by the road surface depth information collection component 3 and the two-dimensional image collection component 4, and send the collected information to an external data storage or processing system through a serial port or a parallel port.

[0042] The above-mentioned image acquisition component 2 can be realized by using an image acquisition card 2 .

[0043] The above-mentioned external data storage system can be realized by using a fixed or movable data storage device or a computer system.

[0044] The above-mentioned external data processing system can be implemented by a comput...

specific Embodiment approach 3

[0046] Specific implementation mode three: see image 3 Describe this embodiment. This embodiment is a further limitation of the two-dimensional image acquisition component 4 in the road surface information extraction device based on two-dimensional images and depth information described in the first specific embodiment. The two-dimensional image acquisition in this embodiment The assembly 4 also includes an illumination source 4-2, which is used to provide illumination for the image collection area of ​​the line scan camera 4-1.

[0047] In this embodiment, an illumination light source 4-2 is added to the two-dimensional image acquisition component 4, that is, a dedicated light source is provided for the line-scan camera 4-1 to improve the clarity of two-dimensional image information acquisition.

[0048] After the illumination light source 4-2 is added, the line scan camera 4-1 can be installed separately from the structured laser 3-2.

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Abstract

The invention discloses a road information extraction device based on a two-dimensional image and depth information and a road crack information detection method based on the device, relating to the road information detection field and solving the problem that the traditional road detection technology is high in erroneous judgment rate and low in recognition since only two-dimensional image information or three-dimensional depth information is used in crack detection. The device is characterized in that a structured light laser emits structured light bars which are projected to a road, and a trigger control system is used to carry out coordinated control on an area-array camera and a linear-array camera according to vehicle speed to acquire road information. The detection method comprises the following steps: a vehicle equipped with the road information extraction device runs on a road section to be detected; a trigger control module triggers the area-array camera and the linear-array camera to perform image acquisition according to vehicle speed; and the road depth information can be obtain according to a light bar pattern obtained by the area-array camera and the road crack information of the road section to be detected is obtained according to a road two-dimensional image obtained by the linear-array camera. By adoption of the road information extraction device and the road crack information detection method, the accuracy rate and correction rate of road crack recognition can be improved effectively.

Description

technical field [0001] The invention relates to road surface information detection technology. It specifically relates to the detection technology of pavement crack information. Background technique [0002] By the end of 2008, the total mileage of highways in China reached 3,730,200 kilometers, and the mileage of expressways reached 60,302 kilometers. According to the national "Eleventh Five-Year" development plan, by 2020, the mileage of my country's expressways will reach 100,000 kilometers. With the continuous development of highway construction in our country, especially the improvement of high-grade highway and expressway network, highway maintenance management has become an important task in the field of highway construction in our country. A comprehensive and in-depth understanding of pavement performance is an important basis for scientifically formulating maintenance plans. Cracks appear on the pavement due to the damage of bad weather, frequent use of transitio...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01B11/00G01B11/02G01B11/28
Inventor 刘宛予黄建平
Owner HARBIN INST OF TECH
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