Discl: I did zero research...
So, there's a helicopter circling/ellipsing/hanging about at the moment.
I thought I'd take a look through my cell phone camera. I wondered if I'd see a cone of light as they track whoever they're after.
But no. I see nothing.
Are they using passive IR, or is something else happening that I haven't thought of?
I suspect passive IR, which is at a wavelength much longer than your cell phone can detect.
If you see helicopters, put on your invisibility cloak; or your mylar thermal blanket...
If you see helicopters, put on your invisibility cloak; or your mylar thermal blanket...
I think there's a lot of footage of people who hide and where heat starts leaking out after a while. You can't stay hidden forever, you inevitably heat up your surroundings.
It's passive. Has to be.
Illuminating a scene simply makes everything brighter. A suspect can simply avoid detection by not moving as they will be just as illuminated as the surroundings.
By having a camera sensitive to the longer wavelengths, body heat shines like light bulb when the rest of the scene is cooler.
PolAir in NSW has FLIR.
I suspect passive IR, which is at a wavelength much longer than your cell phone can detect.
Yes, 9–14 µm is typical. You'll be lucky if your phone camera can see down to 1µm.
If you see helicopters, put on your invisibility cloak; or your mylar thermal blanket...
I think there's a lot of footage of people who hide and where heat starts leaking out after a while. You can't stay hidden forever, you inevitably heat up your surroundings.
No need to hide. You're literally invisible. It's a walk in the park.
So - you reckon you can "green screen" the Police's FLIR?
Impressive.
What'll really screw them is the yetti shaped hot water bottle footprints