This document discusses the industrial application of machine vision. It begins with definitions of machine vision and descriptions of its key components like light sources, lenses, sensors, and processing units. It then explains the basic working principle of how a camera captures an image of an object, the computer analyzes the image characteristics, and communicates acceptance or rejection. Some common application fields are listed as automotive, electronics, food, and manufacturing. Specific applications like measurement, counting, location, and decoding are then described in more detail with examples. The document concludes that machine vision provides benefits like speed, consistency, reliability, and ability to operate in hazardous environments.