Pavement image acquisition method based on laser projection supplementary lighting manner

A technology of laser projection and image acquisition, which is applied in the direction of optical testing of flaws/defects, material analysis through optical means, measuring devices, etc., and can solve problems such as image quality degradation and contrast degradation

Active Publication Date: 2017-05-31
ROADMAINT CO LTD
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Problems solved by technology

[0007] In view of this, the present invention is to provide a road surface image acquisition method based on laser projection supplementary light to solve the problem of the loss of flare and the loss of microscopic details of the image due to the bright field of view in front of the captured road image. , and other image degradation issues

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  • Pavement image acquisition method based on laser projection supplementary lighting manner
  • Pavement image acquisition method based on laser projection supplementary lighting manner
  • Pavement image acquisition method based on laser projection supplementary lighting manner

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Embodiment Construction

[0035] In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.

[0036] The road surface image acquisition method based on the laser projection supplementary light method of the present invention includes: fixing the shooting part and the laser device on the fixed frame above the rear of the car, and the irradiation direction is towards the rear of the car; it is characterized in that the emission light curtain of the laser device is adjusted and the shooting angle of the shooting part, so that the emitting light curtain of the laser and the emitting surface of the scanning line of the shooting part are staggered and not coplanar, and form an included angle; and in the projection on the ground, the scan lines within said projected light curtain;

[0037] The photographing component is controlled to collect images.

[0038] Due to the staggere...

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Abstract

The invention discloses a pavement image acquisition method based on a laser projection supplementary lighting manner, which comprises the following step: fixing a photographic part and a laser on a fixed frame above the rear part of an automobile, with the irradiation direction facing the rear part of the automobile. The method is characterized in that the angle of an emitted light curtain of the laser and the photographic angle of the photographic part are regulated to make the emitted light curtain of the laser and the emission surface of scanning lines of the photographic part non-coplanar and staggered at an included angle; in a ground projection, the scanning lines are in a light curtain of projection; the photographic part is controlled to acquire an image. According to the method, the effect of the obtained image is effectively improved.

Description

technical field [0001] The invention relates to the technical field of road maintenance detection, in particular to a method for collecting road surface images based on laser projection supplementary light. Background technique [0002] Pavement damage is one of the main bases for highway management departments to evaluate pavement performance and make decisions on highway pavement maintenance. [0003] The investigation of pavement damage in the early stage mainly relied on manual visual inspection to determine the type of pavement disease, and generally used a ruler to measure the length or area of ​​pavement disease. This method not only has low efficiency, poor precision, and high labor intensity, but also has a great impact on road traffic and easily causes traffic accidents. [0004] With the emergence and popularization of machine vision technology, the automatic detection method of pavement damage, which uses a vehicle-mounted high-resolution line scan camera to col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88
CPCG01N21/8806
Inventor 潘玉利梅家华
Owner ROADMAINT CO LTD
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