Method for anti-counterfeit inspection of QR code of agricultural product based on watermark library

A method for anti-counterfeit inspection of a QR code of an agricultural product based on a watermark library, comprising:

• randomly selecting a watermark image in a watermark library;
• and
• embedding the selected watermark image in a currently generated QR code to generate a watermark-containing QR code, the embedding comprising preprocessing the selected watermark image by edge extraction through wavelet transform, compressing the preprocessed watermark image, and extracting features of the compressed watermark image;
• constructing the watermark-containing QR codes as the watermark-containing QR code library, wherein the watermark-containing QR code library is used to verify the QR code watermark image, and the QR code watermark image is obtained by tracing the watermark-containing QR codes;
• identifying, by a universal identifier, the watermark-containing QR codes to obtain product information;
• extracting, by a tracing webpage or a mobile phone APP, the watermarks in the watermark-containing QR codes;
• and
• comparing the extracted watermarks with data in the watermark-containing QR library for verification.