Temperature extraction method and device, machine readable medium and equipment

Abstract

The invention provides a temperature extraction method. The temperature extraction method comprises the following steps: acquiring various images of a detection object; determining a target detectionarea of the detection object; acquiring the temperature of the target detection area; and acquiring a target temperature based on the zone growth. On the basis of the characteristic that the human body temperature is similar to the temperature of adjacent points in the region, the region growing method is adopted, the region with the similar temperature is accurately found, and finally, the regionwith the relatively concentrated human body temperature is automatically located to accurately measure the temperature.

Description

technical field [0001] The invention belongs to the field of temperature detection, and in particular relates to a temperature extraction method, device, machine-readable medium and equipment. Background technique [0002] With the raging of infectious diseases such as SARS, bird flu, Ebola and this new type of coronavirus, it is becoming more and more important to improve the ability to screen infectious diseases. Fever is an obvious quantifiable detection indicator in symptoms. The application of infrared thermal imager Body temperature screening has become an important means of epidemic prediction and control. At present, the infrared thermal imaging body temperature screening system has problems such as inability to accurately identify the human body, high false detection rate, and low accuracy of temperature extraction, as follows: [0003] 1. In a complex environment, different objects have different temperatures, and there is a problem of false detection and alarm. ...

AI Technical Summary

Problems solved by technology

[0004] 2. For different parts of the human body, the temperature output of different parts of the thermal map is also different. At present, the maximum temperature of the human body is selected as the human body temperature for most product infrared thermal imaging cameras, and the specific parts of the human body are not tested. The accuracy There are deviations in accuracy and accuracy;

[0005] 3. Distance has a great influence on the accuracy of temperature measurement. The farther the distance, the fewer the number of pixels of the human body. At the same time, it is greatly affected by the absorption and scattering of atmospheric molecules, resulting in poorer measurement accuracy. There are obvious gaps in temperature measurement at different distances. Therefore, different products have a required measurement range, and the measurement data is relatively calibrated within this measurement range

In actual use, the data of a person may not be measured within a reasonable range, and it will eventually show that the temperature value of the person cannot be determined to be the most accurate value, which will lead to deviation or false detection

[0006] The infrared thermal imagers on the market all meet the national standard when they leave the factory, and the final output temperature value meets the accuracy required by the national standard after the black body test. The black body is an accurate and stable heat source, and the detection target is clear. However, in actual use, the correct position of the human body is obtained to measure the temperature. It becomes very difficult, or is often ignored. In actual use, using black body calibration can improve the temperature measurement accuracy, but if the wrong measurement target is selected, the success will fall short.

Images