Compound two-dimensional code and identifying system thereof
A technology for identifying systems and two-dimensional codes, applied in electromagnetic radiation induction, record carriers used by machines, instruments, etc., can solve problems such as potential safety hazards, and achieve the effects of improving security, ensuring information security, and ensuring user privacy
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[0031] The composite two-dimensional code of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0032] figure 1 is a schematic diagram of the composite two-dimensional code of this embodiment.
[0033] Such as figure 1 As shown, the composite two-dimensional code 100 is a composite two-dimensional code provided in this embodiment. The composite QR code includes:
[0034] Carrier QR code, used to carry general information;
[0035] The watermark two-dimensional code is embedded in the carrier two-dimensional code by means of watermark embedding, and is used to carry information different from the carrier two-dimensional code.
[0036] The watermark embedding method in the composite two-dimensional code can be LSB, DCT, DWT, holographic watermark method and other watermark embedding methods (many studies on watermark embedding methods are based on the combination and in-depth research of the above classic algorithms). He...
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