The invention discloses a video-based digital holographic information hiding and processing method, and belongs to the field of information security. The method comprises the steps that firstly,achieving watermark information holography calculation; and then separating a video frame and audio of the video, embedding holographic watermark information into the wavelet transform coefficient, synthesizing an image frame containing a watermark and an audio image by utilizing the holographic watermark wavelet coefficient, and synthesizing the frame image containing the watermark information and theaudio into the video, or synthesizing the video image and the audio containing the watermark into the video. In addition to the hiding method, the processing method also comprises an extraction method. Therefore, by adopting the method provided by the invention, mutual hiding of the video frame and the audio is realized; the function of recovering the complete watermark information by utilizing part of video frame fragments is realized, so that the authentication of the video information is realized; and the security of video information transmission and the reliability authentication of an information source are greatly improved.

Video-based digital holographic information hiding and processing method

The invention discloses an audio encryption and decryption method based on a holographic image. The encryption method comprises: extracting a segment from a received one-dimensional audio signal and converting the segment into an audio two-dimensional image signal; generating a hologram signal from watermark information to be embedded and embedding the in the two-dimensional audio image signal; and performing encryption and scrambling operations by using a SM4 encryption algorithm. According to the saved decryption key, decryption operation is performed by using an order opposite to the encryption method in order to separate the one-dimensional audio signal and the watermark information. The method realizes the encryption of the audio signal and the hiding of the holographic information and transmits the same in the form of images to improve the security of the audio signal transmission. The authentication of the audio information source can be realized by using the information such as texts, signatures, photographs and the like in the watermark which is recovered after decryption. By using the characteristic of not being tore up and the high robustness of the holographic technology, the method can recover the complete watermark information from the partially incomplete audio information image signal and improve the robustness of the audio information transmission.

Audio encryption and decryption method based on holographic image

In this paper, we use one fast Fourier algorithm of the Fresnel integral transform (S-FFT) to realize the digital watermarking information of hologram. The most important point is that by the four-step phase shifting method to obtain four holographic images. We can randomly choose a holographic image embedded in the vector image, thus realizing the digital watermarking technology of holographic images, and the remaining three holograms as watermarking information stored as public key in the optical code. For the host image of containing the watermarking information to do the inverse operation of the watermarking embedding process, we can extract the watermarking information hologram. Used the extracted watermarking hologram and others three public holograms we can reconstruct the watermarking image by four-step phase shifting hologram reconstruction. In this paper, the results of experiments are given by using MATLAB simulation software, the results show that under the premise which is almost without affecting the visual quality of the host image, the extracted image with high resolution, and the watermarking algorithm achieves the desired results. Keywords-digital watermark; digital holography; four-step phase shifting; fresnel transform; fast convolution

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Fu Zirui

Papers

Audio encryption and decryption method based on holographic image

Digital Watermarking Technology of Holographic Image Based on S-FFT Method