Application and Research of Infrared Thermal Imaging Technology in Biometric Detection

The state and properties of objects and living bodies can be measured by the temperature distribution images on their surfaces, so thermal imaging has a wide range of applications, such as industry, security, military, scientific research, and so on. In natural scientific research, compared with other methods, infrared thermal imaging technology provides a safe and non-invasive means of measurement and data acquisition. In the fields of human and veterinary medicine, ecology, zoology, and other fields, there are many applications.

1. In the field of animal behavior research, infrared thermal imaging can be used to measure changes in body temperature under stress conditions and during different types of behaviors.

2. In the study of cold adaptation behavior and physiology of insects, infrared thermal imaging can better overcome the shortcomings of traditional methods such as scanning calorimetry and thermocouples, which must ensure that experimental insects are still, and dynamically measure and record insect behavior and body temperature.

3. Infrared thermal imaging technology can provide a large amount of physiological information, such as supercooling point, lethal low temperature, etc., and the information obtained by this method is more biologically meaningful because it does not restrict the movement of insects and is closer to the natural environment.

4. Research on cold-adapted behavior and physiology of insects—some scholars have used infrared thermal imaging cameras to observe large groups of free-ranging Brazilian free-tailed bats, proving that infrared thermal imaging technology is a valuable tool for investigating gregarious bats foraging and other behaviors. Computer vision-related algorithms were also used to identify and track flying bats and distinguish them from other objects of similar temperature, ultimately determining the total number of bats roosting and foraging in the cave.

Numerous case studies have shown that infrared thermal imaging can be used to study animals that are free-ranging in the wild and difficult to observe by traditional means.

For scholars who study animal behavior, especially entomologists, how to observe animal behavior is a daunting problem, and it is even more difficult to observe in the wild. The main focus is on locating the individual and continuous observation throughout the lifespan.

Another layer of difficulty arises when researchers need to quantify behavior. Therefore, in recent years, machine vision and computer vision in the industrial field have been used to overcome the practical problems encountered in the above-mentioned animal behavioral research, and further reveal the behavioral patterns of animals.

The animal behavior observation system based on "computer vision" consists of animal behavior analysis software, animal activity room/pool, camera, etc., digital video is recorded through the digital camera, and the software is used on the computer according to the principle of contrast method (color or black and white) Behavioral analysis of the target animal in the video.

The "infrared thermal imaging + computer vision" animal behavior research system makes full use of mature technologies in the industrial field and can be used in animal behavior, physiology, and other fields such as insects at the same time. provide a lot of biological information.

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