物理研究鱼的眼睛和视网膜显示大多数鱼能获得清晰对焦的图像，侦测动作，并具有良好的反差度检测能力。

Physical studies of the eyes and retinas of fish show that the majority can obtain a clearly focused image, detect motion, and have good contrast-detection ability.

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利用激光和背景强度之间的反差，通过激光目标检测算法进行告警。

Based on the contrast between laser and background intensity, warning is carried out through laser target detection algorithm.

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与固定阈值和全局阈值算法相比，局部阈值插值算法对一些细碎的云和与背景反差不大的云获得了更好的检测效果。

Compared with the fixed threshold and the global threshold algorithms, the proposed method obtains better detection effects for clouds in small, broken bits and weak contrast clouds.

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