Method based on a security-letter codes and digital watermarking

The present invention proposes a method based on the security-letter codes and digital watermarking. The Chinese letter code as watermark information is hidden in any digital image, and the digital watermark embedded barcode image is added to the relevant position of the goods require security, the security detection system embedded in the image and decode bar code watermark is extracted, thereby obtaining information about the product, thereby determining the authenticity of goods.