[rvaubel]

Consider a piece of charcol. It is the closest common thing to "black" that we have in our everyday world. It is "black" because it reflects very little light of any frequency .

Consider a "black" dyed fabric. Often, such a dye will be very reflective in the infrared but not at all in the visible spectrum. We call it "black" because it looks black to us. But to an animal that sees in the infrared it may be white.

The M8's sensor is an "eye" that sees in both visible light our eyes see and the infrared light that we don't see. The colorimetric software that controls the display function simply interprets that infrared signal as the color purple (in this case) which is a false color, not actually the color of the infrared. Remember the infrared frquency has a color we can't see!

Thats why an object that has a carbon based pigment in it will stay "black" while an object with a dye based "black" will appear purple.
Ironically the M8 is actually doing a better job representing reality than a more heavily filtered camera is.

Both software filters and physical filters can theoritically strip the IR signal from the reality that the object is reflecting. There is a solution

Rex