Drug addict screening method based on IPPG

Abstract

The invention discloses a drug addict screening method based on IPPG. The method comprises the steps of collecting or recognizing a face video image, extracting an effective frame image containing faces, extracting a face ROI from the frame image, extracting an IPPG signal from the face ROI, and performing enhancement and noise reduction combined treatment on the IPPG signal to obtain a clean pulse wave signal. Pulse wave characteristic parameters and physiological index data are obtained by analyzing and processing the pulse wave signal, then the pulse wave characteristic parameters and the physiological index data are compared with a model constructed by an existing sample database, the drug taking condition of a detected person is judged, and besides, detection data is automatically stored in the database to supplement and perfect the model. According to the drug addict screening method based on IPPG disclosed by the invention, the drug addict screening period can be effectively prolonged, the influence of the metabolic period is reduced, the detection efficiency and convenience are improved, the economic benefit is increased, and the problems of personnel mismatch, sampling infection hidden danger, biological sample pollution and the like possibly existing in a traditional screening manner are solved.

Description

technical field [0001] The invention relates to the technical field of drug inspection, in particular to an IPPG-based screening method for drug addicts. Background technique [0002] Drug use testing can be divided into on-site testing and laboratory testing, in which on-site testing is mainly based on saliva and urine testing, and laboratory testing is to collect biological samples such as urine, blood or hair of the tested person for more detailed and accurate detection. The detection of biological samples is to detect the metabolites of drugs. Studies have shown that it takes a certain amount of time for drugs to metabolize into saliva, urine, blood or hair after entering the human body, usually about 1 hour to 4 days. The type, quantity, and physique of drug addicts are different. When the drug intake is small, it may take longer for metabolic precipitation, and the metabolic cycle after precipitation may be shorter. Different types of drugs have different ingredients...

AI Technical Summary

Problems solved by technology

Different types of drugs have different ingredients, and different detection reagents are required for detection, and the matching situation directly affects the detection results

Therefore, as the most commonly used and most effective method for drug use detection through biological samples, there are still situations such as missed detection, false detection, and time-consuming due to the matching of detection kits and metabolic cycle problems.

[0003] In addition, there are also many problems in sample collection. For example, urine collection sometimes requires staring at its authenticity. When collecting female drug users, it is often necessary to temporarily deploy female police officers; when the sample is not cooperative, the collection is difficult. increase, and there is a risk of infection when sampling drug users with AIDS or viral hepatitis, etc., while ensuring the authenticity of the samples, it is also necessary to prevent the samples from being contaminated

Moreover, the trend of concealment of drug use and camouflage of new drugs is increasing, requiring more police force to control and inspect places that may be involved in drugs, and the difficulty of investigation before testing has further increased

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