Encryption technology: Improve product safety through anti-counterfeiting technology;
At present, the method of recording information on printing and printing media in the world is limited to the geometric method, and the screen coding has broken through the geometric method, and the wave propagation on the two-dimensional plane is changed by changing the modulation mode of the screen dot. In the way, information is recorded by physics methods such as different mechanical models, while information recording and information burial of the characteristics of the printed screen are considered.
- The principle of information recording and information burial of screen coding is to realize information recording and information hiding by changing the physical characteristics of the screen dot without changing the characteristics of the printing screen including the gray value of the dot. Embed a lot of information in text, photos, images, graphics.
- When information hiding is performed by screen coding, the screen-coded dots of the same gray scale as the pixels of the image are replaced, so that the quality of the image after embedding the information is not greatly affected.