比人眼更强大的是......

Machine vision is useful in making and quality control because it can direct robots in specific tasks and detect subtle defects in products in less time than human inspectors. A bottling company, for example, may use machine vision to insure that containers are sound or that labels are affixed correctly. Most machine-visions use a standard 640-by-480-pixel grid for comparing images. Each pixel is one of up to 256 shades of gray, allowing the computer to register more subtle variations between images than the human eye, which can typically see only about 64 shades of gray. 机器视觉在生产和质检领域是非常有用的，它可以指导机器人找到肉眼无法发现的质量缺陷。一个瓶装厂就可以利用机器视觉来检查每个瓶子是否都是合格的，以及瓶身上的标签贴的是否正确。大部分机器视觉使用640X480像素来进行图片比较。而每个像素允许高达256个灰度等级，人眼则只能识别64个灰度等级，这使得电脑能够进行更细微的图像比较。