The research of information hiding and extraction based on QR code positioning function

Using a mobile phone to reading dot information which based on halftone microstructure first need to achieve accurate positioning. To solve this problem, this paper using the technology of QR two-dimensional code, and the positioning information is superimposed on a halftone image to generate a new image containing location information. When the phone reading the information of printed image, it can utilize the positioning function of QR two-dimensional code to accurately correct the image. Experimental results show that this method effectively solved the technical bottleneck problem that mobile phone reading the hiding information in the microstructure of printed image.