Humans often need to carry out various observation, exploration and hunting activities in outdoor environments. However, the outdoor environment is complex and changeable. Especially in the dark environment, the human eye and ordinary telescopes cannot help us detect targets well. Therefore, outdoor thermal imagers play a crucial role in outdoor scenes. They are not affected by light and generate thermal maps by detecting the infrared radiation emitted by objects. In search and rescue missions, thermal imagers can quickly locate the difference between the body temperature of the missing person and the environment; outdoor sports enthusiasts can use thermal imagers to find water sources, plan camp layouts, monitor the surrounding environment and stay vigilant at night; researchers and nature lovers can use thermal imagers to observe the behavior of animals without disturbing them; hunters can track and locate animals from a distance and improve shooting accuracy.