关键词: Microfl uidic, Self-adaptive, Camoufl age, Chameleon, Bionic skin

Abstract: To adapt to a complex and variable environment, self-adaptive camoufl age technology is becoming more and more important in all kinds of military applications by overcoming the weakness of the static camoufl age. In nature, the chameleon can 
achieve self-adaptive camoufl age by changing its skin color in real time with the change of the background color. To imitate 
the chameleon skin, a camoufl aged fi lm controlled by a color-changing microfl uidic system is proposed in this paper. The 
fi lm with microfl uidic channels fabricated by soft materials can achieve dynamic cloaking and camoufl age by circulating 
color liquids through channels inside the fi lm. By sensing and collecting environmental color change information, the control signal of the microfl uidic system can be adjusted in real time to imitate chameleon skin. The microstructure of the fi lm 
and the working principle of the microfl uidic color-changing system are introduced. The mechanism to generate the control 
signal by information processing of background colors is illustrated. “Canny” double-threshold edge detection algorithm 
and color similarity are used to analyze and evaluate the camoufl age. The tested results show that camoufl aged images have 
a relatively high compatibility with environmental backgrounds and the dynamic cloaking eff ect can be achieved.

Key words: Microfl uidic, Self-adaptive, Camoufl age, Chameleon, Bionic skin