Study On Information Hiding Technology Based On Halftone Screening Anti-counterfeit Printing

The digital halftoning is a technology，which can realize the reproduction optimization of the image on the binary output devices.The ampliutde modulation/frequency modulation halftoning is a common screening method， it shows the image tone by the dot size and density.While modern anti-counterfeit printing technologies usually adopt special ink，laser holographic images,line texture,they need to increase certain supporting printing equipment and the cost.They have such shortcomings as high cost， complex technology, narrow application area and no information hiding,etc． This paper proposes a kind of information hiding technology based on anti-counterfeiting of halftone printingThe technology combining halftone screening，modern communication modulation technology and information coding technology, information(such as graphic,image,or text) is pretreated with the technique of encrypt, scrambling and interleaving coding,then the pseudo-random information is obtained．chooses anti-counterfeiting information as modulation signal to modulate dot shapes and then makes itself carry information in screening image process．After plenty of experimental simulation,this method realized the information hiding．It Is a kind of economic,environmental protection anti-counterfeiting technology and a new information hiding technology..It can be used to anti-counterfeit printing,can also be store or hide data information with low cost and excellent performance．...