There's an old joke about consultants that reads something like, "Ask a consultant what time it is and they will borrow your watch and tell you the time." When I first heard the joke, I thought it was quite funny, especially since I have personally been asked questions about how to design machine-vision systems for various applications. Unfortunately, while the joke may ring true to many considering deploying a machine-vision system, it is not as amusing when one considers the disparate disciplines of optics, illumination, image processing, computer science, and mechanical engineering needed to develop such an application. Indeed, this is the main reason that the development of these systems is so challenging and at the same time so frustrating.
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