The colours on images in this post are colors from FLIR infrared camera. These are not from external editor apps.
Higher 🌡️ temperature is in red and there are different color palitras to better reflect the difference in a temperature.
These images are done by not professional camera and temperature may not show precise. Even not always correct, difference in temperature is most important.
Thermal photography has many applications in engineering, security, medicine, many others.
Flir website to see available cameras (professional and not) is below:
In the article below, one can find medical images and a comparison between FLIR and SEEK infrared cameras.
Original images in low resolution are always possible to recover with a Flir app.