Wednesday, May 29, 2013

How to hide from infrared cameras

Yet look perfectly normal, that's how the tutorial on this website touts the baseball hat that turns you into a blob of infrared light.

You can buy infrared LEDs with various wavelengths, and your preference for hiding from infrared camera would be the range around 850nm, which is the one closest to the color red. The 940-950nm is too long of a wavelength to be picked up well by IR cameras. It would probably not hurt to add a couple of 870s and 950s.

When you are done, you want to test the hat. Since infrared light is not visible to the eye, one way to have an indication of the correct functioning of your hide-a-head is to have a weak 'indicator' LED in the array, preferably on the inside of the hat.

Better would be an infrared camera.

You may already own a device for this, for example, an unused cell phone or an old webcam. Instructions are readily available on the same website, or on YouTube, or on this website.

Mini drones are finding their way to a location near you, and we do not like being on camera all the time.

Only days ago, the railroad folks of Deutsche Bahn announced they would be using small drones to find graffiti artists or vandals at night on larger rail yards.
The drones are supposed to take pictures good enough for identification of the vandals. Their math as to the damages caused by vandals are as doubtful as you would expect from any company their size. It is claimed that they book damage figures for locations they never clean up, such as overpasses. And when existing graffiti in such a place is graffitied over, they book damages again.

The K-landnews team is not worried about this use of drones. If spray painters do not wear a full mask to protect themselves against the fumes, capturing them on camera might be good for their health later in life.

But if you drive by the fence of a yard because this is the only road home at night, why should you leave an imprint on some camera?



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