Night Vision Goggles (NVGs)...
Amplify existing visible light.
There must be at least a low level of visible light (starlight).
Generation III NVGs can detect energy from 0.6 to 0.9 microns and increase the light gain 30 to 50,000 times.

Infrared Cameras...
Detect light emitted by objects regardless of the amount of visible light.
Will camouflage paint hide an object or person from Infrared cameras?
Not if the object has thermal contrast between itself and its background! People are generally easy targets for IR cameras.
