You have to carefully look at [upir’s] Arduino thermal camera project because it intersperses pictures of what you expect an 8×8 sensor will produce with images produced by a much better camera.

The Raspberry Pi compute module is a powerful piece of hardware, especially for the price. With it, you get more IO than a normal Pi, plus the ability to design hardware around it that’s spec… ...

The Arduino monitors the battery level and indicates its charge on the RGB status LED. The Arduino can also trigger the camera’s shutter using an NPN transistor and 2.5mm 3 pole jack.” ...

The resulting ‘Raspberry Pi Camera Module 3 Sensor Assembly’ measures 10.8 x 10.8mm plus the connecting flexy. Inside, its die is the 4,608 x 2,592 (11.9Mpixel) Sony IMX708, which has 1.40μm pixels, a ...