The sensor can be pointed at an object, and the Arduino can sense the brightness of that one point. Since this camera compiles an image so slowly, it sometimes has a problem with varying brightness.

While thermal imaging cameras – even inexpensive homebrew ones – have an infrared sensor that works a lot like a camera CCD ... thermometer sensor and an Arduino to change the color of ...

An ESP32-powered surveillance camera with object recognition ... the specific code library for your sensor inside the Library ...