Polarization correction device and method

Abstract

The invention discloses a polarization correction device and a polarization correction method applying the polarization correction device. The polarization correction device comprises a light source unit, a polarization generating unit, a regulating unit and a polarization correction recording unit, wherein the light source unit provides environment light; the polarization generating unit is arranged opposite to the light source unit and is used for generating polarized light according to the light generated by the light source unit; the regulating unit is movably connected with the polarization generating unit and is used for regulating the direction of the polarized light generated by the polarization generating unit; and the polarization correction recording unit is connected with the regulating unit and is used for measuring and recording the offset generated by the regulating unit. By providing the polarized light of which the direction can be regulated, the polarization correction device realizes rapid and accurate polarization correction on a camera of a traffic information automatic collecting system.

Description

technical field [0001] The invention relates to traffic information collection technology, in particular to a polarization correction device for correcting traffic information collection equipment and a polarization correction method using the polarization correction device. Background technique [0002] With the development of the economy, the traffic flow is increasing rapidly, and it is far from enough to rely solely on manual statistics. In this case, the automatic collection and detection system of traffic information is being applied more and more. At present, most of the commonly used automatic traffic information collection systems set up detection points on the motorway, and record videos or pictures through cameras or cameras at the detection points. To keep the system up and running 24 / 7, imaging in a wide range of lighting conditions must be addressed. [0003] Natural light is unpolarized light whose vibrations are evenly distributed in all directions. Howeve...

AI Technical Summary

Problems solved by technology

[0006] However, there are some problems in the current debugging process: First, it is necessary to ensure that there is sufficient ambient light around the subject. In the weather with insufficient sunlight, the polarization phenomenon is not obvious, and it is impossible to obtain accurate debugging results. Secondly, in terms of selecting the subject, either use a vehicle that is normally moving in the lane, or park a car or other object at a corresponding position in the camera's field of view

However, due to the relatively fast speed of the vehicle, the former cannot keep the position of the vehicle captured each time during debugging consistent, so that the images captured successively have almost no reference value, so it is necessary to increase the number of snapshots, prolonging the debugging time; while the latter vehicle’s The specific size will affect the debugging results

In addition, no matter what kind of subject is used, the degree of reflection on the surface of the subject is generally observed with the naked eye or through the captured image until the reflection disappears or weakens, and whether the reflection has disappeared or weakened to a sufficient degree, usually It can only be judged by experience or estimated value, and the accuracy of debugging is not high

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