http://www.rayteccctv.com/_assets/l...7d4cc0469b9/White-Paper_-_Lighting_Theory.pdf
"Demonstration that Reflectance depends on the Material
"Lighting Theory
Consider the two images above. The image on the left,
illuminated by White-Light shows both people to be
wearing black clothing. However, the image on the right,
illuminated by Infra-Red makes it appear that one person
is wearing light coloured clothing and the other is wearing
dark coloured clothing.
Although both items of clothing appear black under
White-Light illumination (because they absorb the light)
one of the items reflects large amounts of IR and appears
white under IR lighting conditions"
"Demonstration that Reflectance depends on the Material
"Lighting Theory
Consider the two images above. The image on the left,
illuminated by White-Light shows both people to be
wearing black clothing. However, the image on the right,
illuminated by Infra-Red makes it appear that one person
is wearing light coloured clothing and the other is wearing
dark coloured clothing.
Although both items of clothing appear black under
White-Light illumination (because they absorb the light)
one of the items reflects large amounts of IR and appears
white under IR lighting conditions"