At night, it's the extra-sensitive rods that take over — this is why it's difficult to detect color in low levels of light.

夜间，特别敏感的视杆细胞在眼睛视物占有主导地位—这就是为什么在昏暗的光线条件下我们很难看到事物的色彩。

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First, the new target is characterised, then an algorithm[color=#FF0000] (a series of rules programmed into a computer) is devised to detect it in scanned samples.

首先，新目标会被识别，[color=#FF0000]然后一个运算法则（一串被输入进电脑的运算法则）会被设计出以在被扫描物品中侦测爆炸物。

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For example, inshore fish have good color vision, whereas offshore pelagic fish have limited color vision and detect only a few if any colors other than black and white.

例如，内海鱼类有良好的色彩视觉，而外海中上层鱼类则有有限的色彩视觉只能检测少数黑色和白色以外的其他颜色。

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There are many ways to detect explosives through senses of sight (general appearance and color), and touch (texture, weight per volume).

FORBES: Young Juvenile Makes An Explosive With Baby Powder And Other Tales From The URI Explosives Lab

If painting the colors back in sounds like hard work, there's also an automatic fill tool to detect edges and colors and either fill in or remove the color automatically from a selection (although we had mixed results using this tool).

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