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Machine vision is the application of computer vision and related technologies to industrial automation. Automated visual inspection is one of these applications, which can be used to solve many problems in industry. Industrial applications require customized solutions, subject to several particular constraints. The final step of integration of a vision system to an industrial process is not an easy task, mainly due to the variability of the industrial process; the design of a machine vision system must take in account this variability. This paper presents an overview of computer vision systems, some applications on automated visual inspection, aspects involved in their development, and aspects related to the integration of the vision system to the industrial process.