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active camouflage
Active camouflage or adaptive camouflage is camouflage that adapts, often rapidly, to the surroundings of an object such as an animal or military vehicle. In theory, active camouflage could provide perfect concealment from visual detection.
Active camouflage is used in several groups of animals, including reptiles on land, and cephalopod molluscs and flatfish in the sea. Animals achieve active camouflage both by color change and (among marine animals such as squid) by counterillumination, with the use of bioluminescence.
Military counterillumination camouflage was first investigated during World War II for marine use. More recent research has aimed to achieve crypsis by using cameras to sense the visible background, and by controlling panels or coatings that can vary their appearance.
==Definition==
Active camouflage provides concealment either by making an object not merely generally similar to its surroundings, but effectively invisible through accurate mimicry, and by changing the appearance of the object as changes occur in its background.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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