Method of measuring opacity of smoky car based on camera gray scale

Abstract

The invention relates to a method for measuring the opacity of a smoky car based on the gray scale of a camera. The method for measuring the opacity of a smoky car based on the gray scale of the camera comprises the following steps: step 1), when the vehicle passes by, the camera takes a color picture; step 2), uses an area recognition algorithm to identify and select a useful area in the pattern, Including the reflector measurement area and the reference compensation area; step 3), the area detection algorithm combined with the area growth algorithm to accurately identify the effective area of ​​black smoke; step 4), calculate the opacity of the black smoke of the vehicle; step 5), when the opaque When the photometric calculation exceeds the unqualified limit, save the black smoke picture. The purpose of the present invention is to provide a method for measuring the opacity of a smoky car based on the gray scale of the camera, which can perform effective telemetry, has a simple structure and is convenient to adjust; it can accurately measure the black smoke emitted by the vehicle during driving Opaque smoke and take pictures of black smoke as a basis for 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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