Thermal Imaging
Thermographic or Infrared (IR) cameras create images using IR radiation as apposed to the visible light used in conventional cameras. Basically, what this means is that they are able to “see” heat as it radiates from an object and then display the differences in heat within its picture as various shades of grey in black and white video. Thermal cameras are therefore able to see through objects when a heat source is inside, require no light, and are not affected by things like smoke or dust.