Hi all,
Does anyone have any experience with the FLIR Lepton 3? (160 x 120).
I'm looking to do on-board thermal image processing from a drone (for fire detection) and found that the FLIR Lepton is easily integratable with the Raspberry Pi. However, I'm quite worried about the resolution of the camera, and was wondering if any one has any experience flying this camera from high up? with images or video footage that I can look at? All the videos i've seen are from very close up.
Our goal is to detect a fire of 0.75 x 0.75 meters from a maximum height of 50 meters if that helps.
Thanks in advance ,
Dana
Check out footage from the FLIR Duo, that uses a Lepton 3 core. Designed for drones, albeit crap resolution for it.
Sent from my iPad using Tapatalk
Wow, my trigonometry is rustier than I thought. But at 50m distance, with a 50-degree FOV, you'd see a patch of terrain around 50 meters wide. That's diagonal, I assume, so a 160x120 image works out to something like 4 pixels per meter, 25cm per pixel. Your fire would be at least 3x3 pixels on the sensor in that case.
But, of course, fires are hot -- far hotter than anything else in the scene. Even a fire much smaller than a single pixel might be fairly obvious in the image.
If you want to discern details about the shape of the fire, the Lepton probably wouldn't help you much at that range. But detecting the presence of small fires should be easy, I'd think...?
I don't own a drone, but could probably hold mine off of the top of my building (around fifty feet) if that would help.