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Is there a way to use LabVIEW Vision Assistant to grab a live (closed loop) data stream from a measurement device?

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So let's say I've got a subVI that does some computation based on a string of values that it prompts a user for every 10 mins. Is there a way to have labVIEW automatically, using a webcam, extract the data from the picture, and convert it to a string to be fed into the subVI?

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There are ocr functions.

For details and more help, you should post to the machine vision board.
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