I'm a bit stuck here guys. I am but a humble computer scientist, so I'm hoping you guys can give me some insight. I have an IR sensor that's capable of detecting a target temperature (whatever it's pointed at) and the ambient temperature. I have objects (humans, hot mugs, etc.) sitting in front of it at different distances. I am trying to measure the "true" temperature of objects at different distances. 2. Relevant equations Intensity is proportional to 1 / distance2 σ = 5.67 x 10-8 3. The attempt at a solution I've tried to look for radiation/distance models online but haven't found much (maybe my google fu is failing me?) what I've done so far is found a curve fit radiation at different distances and used that equation to calculate that temperature, but it's a bit time consuming to do, I'm hoping there must be some sort of model that I missed.