Body temperature determining method suitable for infrared body temperature screening system

Abstract

The invention discloses a body temperature determination method suitable for an intelligent infrared body temperature screening system. The body temperature determination method is used for a mappingrelation from an infrared image gray value to a human body temperature in the intelligent infrared body temperature screening system. The method comprises the following steps: firstly, compensating aforehead gray value according to the gray value of a forehead area of a measured person in an infrared image and an environment temperature; secondly, determining a gray value reading of a thermal infrared imager and a relationship between the distance and the temperature by utilizing distance information of a black body and black body-thermal imager output by a TOF camera, and further determiningthe mapping between the gray value reading of the thermal imager and a nominal forehead temperature; and finally, determining the body temperature of the measured person according to a correspondingrelation between the nominal forehead temperature and the body temperature, comparing with a set threshold value, and determining whether the measured person is a suspected fever person. The method has characteristics of good environmental adaptability, high precision, good stability and the like.

Description

technical field [0001] The invention relates to the technical field of body temperature screening, in particular to a body temperature determination method suitable for an infrared body temperature screening system. Background technique [0002] Public places such as stations, airports, hospitals, ports, and schools often need to conduct body temperature screening to find out people with fever, especially when there is an epidemic. Body temperature screening is more important. Existing body temperature screening in public places generally uses non-contact temperature measurement methods such as infrared cameras to screen large areas of mobile personnel. For the body temperature screening system based on the infrared thermal imager, the body temperature measurement method is the key. The temperature measurement performance of the existing infrared body temperature screening system is greatly affected by factors such as the ambient temperature and the measurement distance, mak...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a body temperature determination method suitable for infrared body temperature screening systems, which solves the problems of existing infrared body temperature screening systems that are greatly affected by distance and poor environmental adaptability.

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