Infrared imaging is a technique used to capture and visualize thermal radiation emitted by objects in the infrared portion of the electromagnetic spectrum. This technology allows for the detection of heat signatures and temperature variations in objects, which can be useful in various applications such as security surveillance, medical imaging, and thermal imaging of buildings and structures. Infrared imaging works by using specialized sensors to detect infrared radiation emitted by objects, which is then converted into a visual image for analysis and interpretation.