Method for measuring light obscuration of black smoke vehicle based on grey level of camera

Abstract

The invention relates to a method for measuring light obscuration of a black smoke vehicle based on a grey level of a camera. The method for measuring the light obscuration of the black smoke vehiclebased on the grey level of the camera comprises the following steps: (1) shooting colorful image through the camera when the vehicle passes by the camera; (2) identifying and selecting useful areas inpattern by using an area identification algorithm, wherein the useful areas comprise a reflection plate measurement area and a reference compensation area; (3) accurately identifying a black smoke effective area with combination of an area detection algorithm and an area growth algorithm; (4) calculating the light obscuration of the black smoke of the vehicle; and (5) saving the black smoke imagewhen the calculated light obscuration exceeds unqualified limit. The invention aims to provide a method for measuring the light obscuration of the black smoke vehicle based on the grey level of the camera; the method is capable of carrying out effective and remote measurement; a device used in the method is simple in structure and convenient to adjust; the method is capable of monitoring the situation of the black smoke discharged by the vehicle in the running process, accurately measuring the light obscuration of the black smoke, shooting the black smoke image and taking the black smoke image as the basis of law enforcement.

Description

technical field [0001] The invention relates to a method for measuring the opacity of a smoky car based on the gray scale of a camera. Background technique [0002] In recent years, the pollution of smoky vehicles has always been the focus and difficulty of motor vehicle environmental protection. A large amount of black smoke has caused serious harm to the human respiratory system and immune system. The research on the mutagenic and carcinogenic effects of motor vehicle exhaust pollution has always been a domestic One of the hotspots of related research. However, the phenomenon of black smoke emission from motor vehicles is relatively common, especially when diesel vehicles are starting, accelerating, going uphill, and overloading, which seriously affects the image of the city. The emission of black smoke mainly comes from diesel vehicles. These "black smoke" are the products of fossil fuel combustion, and their surfaces will absorb pollutants such as polycyclic aromatic hy...

AI Technical Summary

Problems solved by technology

[0004] 1) Transmission-type smoke meter, which uses measurement to extract the black smoke vehicle exhaust to the analysis unit, and then measures the vehicle black smoke through light intensity attenuation; the transmission-type smoke meter needs to extract the exhaust gas from the vehicle exhaust hole to measure, and the use occasion is subject to limit;

[0005] 2) The opacity of the telemetry type smoke is transmitted to the detector through multiple laser beams, the black smoke emitted by the vehicle passes by to block the laser, and the detector measures the light intensity attenuation to calculate the opacity; the telemetry high-power laser, multiple The road detector has a complex optical structure, which is not easy to debug and maintain; and the law enforcement cannot save the pictures when it is tested, and there is no basis for law enforcement

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