QR Code Based Research on Digital Watermarking Algorithm for Tile Remote Sensing Image

A blind watermarking algorithm which has strong robustness based on quick response (QR) code for tile remote sensing image was presented. Considering the data feature of tile remote sensing image fully, QR code image which contains the information of copyright authentication is compressed and pretreated in order to reduce the quantity of embedded data effectively. The watermark is embedded reliably based on building a stable mapping relationship between the watermark embedding units and the information bits. The method which changes the statistical characteristics of bit-plane of the pixel value can achieve fast positioning of tile remote sensing image which contain watermark. Finally, the proposed algorithm is validated by test. The result proved that QR code effectively enhances the capacity of watermark information, and the proposed algorithm has good fidelity and robustness to common image processing operations and mosaic attacks, which can be used to protect the copyright of tile remote sensing image.