Research Of Watermarking Encryption Processing Of Digital Holography Image

People can use mobile devices to get all kinds of digital products such as images,videos etc with wireless network nowadays.But the resulting digital product safety problem is getting worse.Digital watermarking technology has been widely used as an important protection method in the field of information security.Compared with the traditional digital watermark methods,the hologram itself,as a watermark,has the feature of encryption in the progress of generating,however,it contains large amount of information,if we make it as a watermark to embedded it into the carrier image with no processing,it will lead to a drop of the carrier image which contains the watermark image.Therefore,it has important research significance and broad market prospect to compress the hologram watermark.First of all,the paper puts forward a scheme of making use of the improved Particle Swarm optimization Algorithm PSO-GA(Particle Swarm Optimization-Genetic Algorithm,PSO-GA),combining the Genetic Algorithm with Particle Swarm Optimization(PSO)Algorithm,and establish a hologram compression model of a new improved Algorithm.Then comparing the mass effects on the hologram compression models of improved algorithm with the models of PSO,standard PSO and GA algorithm.And the results show that the optimization algorithm of hologram compression model not only make the hologram information have a better compression,but also reduction of hologram quality can be better.Secondly,the DWT-SVD algorithm is used to deal with the image of watermark and carrier by combing the singular value decomposition(SVD)with discrete wavelet transform(DWT).By introducing a comparison experiment,the results show that the improved algorithm not only can effectively guarantee the invisibility of the digital hologram watermark to be good,but also has a very strong ability against the attack such as the noise,JEPG compression,cropping,filtering,translation and rotation etc,and they can achieve a ideal coexistence.