At present, the most commonly used and simplest physical isolation scheme is equipped with two sets of computers to access the internal network and the external network respectively, but this brings great inconvenience to the information exchange and use. Based on this, this paper designs and implements a system of file transfer between internal and external network devices under physical isolation based on visual recognition. On the basis of the realization of QR code picture transmission, it also realizes the QR code video transmission mode for the transmission of large files, which further improves the transmission efficiency. In addition, the system increased according to the instruction to fetch another computer pictures or database information and back to the original computer function, more in line with the actual use of demand.
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