Image Multiple Encryption Based On Moire Effect

Moire effect is a phenomenon that two layers with some relationship stacked together on a specific location produce a new pattern.Based on the research of the moire effect,this paper proposes a method of image information hiding method based on time-averaged moire fringes,which can be used to solve the security problem of information transmission.The main defect of specify moire fringe build method based on phase modulation for image information hiding technology is that the secret information in the image that carries the secret information is low concealment and easy to be reproduced by the naked eye.In this paper,based on the information hiding of the specified moire fringe construction method based on phase modulation,a multi-image information hiding technology based on time-averaged moire fringe construction method is proposed.In the process of hiding,the appropriate distance is selected to form the background grating and the secret grating image,and then the background grating and the secret grating are simply superimposed and embedded.In order to solve the low concealment problem caused by the phase jump between the background grating and the secret gratings,the phase matching algorithm is used to achieve smooth transition between the phases.The initial random phase deviation is used to increase the difficulty of the hidden information reconstruction by the naked eye.In the process of hidden information recurrence,the dense images generated during the hiding process can produce the time averaged fringes in a region satisfying the specific relationship in the process of vibration.Through texture contrast,due to the difference between the background part and the secret information part,the hidden information can be observed through naked eyes.This process does not require the participation of computers,nor does it require complicated cryptographic computation.In multiple information hiding,using the relationship between the amplitude,the pitches and the roots of the first class zero order Bessel function,multiple direction gratings and multiple raster are introduced in the process of time-averaged stripe formation,and multiple information hiding is achieved by different combinations of direction and pitches.This method could increase the capacity of information hiding and improve the difficulty of revealing secret information in the same time.Compared with the specify moire fringe construction method based on phase modulation for image information hiding technique,the proposed method has a better concealment,and only produces one secret sharing image.The recurrence of the secret information is generated by the vibration which is a dynamic visual cryptography.