本文選題：信息隱藏 + 數(shù)字水印　； 參考：《中國(guó)科學(xué)技術(shù)大學(xué)》2017年碩士論文

【摘要】：隨著互聯(lián)網(wǎng)的傳輸能力和計(jì)算機(jī)信息處理能力的提升,多媒體信息已經(jīng)可以方便高效地在互聯(lián)網(wǎng)中傳播,并可以讓人們?nèi)我獾乜截惻c修改。在此趨勢(shì)下,多媒體信息的內(nèi)容安全性已經(jīng)成為近20年來(lái)人們普遍關(guān)注的問(wèn)題。在眾多的信息安全技術(shù)中,加密和信息隱藏技術(shù)成為了多媒體信息內(nèi)容隱私保護(hù)、篡改檢測(cè)、版權(quán)管理等等的主要手段。如果按照嵌入域分類(lèi),信息隱藏技術(shù)可以分為空域(或時(shí)域)和變換域方法,其中變換域方法包括了近幾年被提出的加密域方法,如果按照可逆性分類(lèi),又可以分為可逆信息隱藏和不可逆的信息隱藏。本文根據(jù)信息隱藏的不同類(lèi)別,分別研究了圖像和視頻的空域以及加密域、壓縮域信息隱藏,并著重研究了信息隱藏技術(shù)中的可逆性和容量-失真性能。本文所研究的內(nèi)容主要分三個(gè)部分,分別為空域的可逆信息隱藏、DCT域水印算法及其優(yōu)化、以及視頻加密域可逆水印。這三部分分別對(duì)應(yīng)空域、變換域、加密域方法。本文的主要貢獻(xiàn)有以下三點(diǎn):1、提出一種基于像素灰度值預(yù)測(cè)差值的直方圖平移方案。首先采用Warped Distance算法來(lái)做像素值的預(yù)測(cè),再在此基礎(chǔ)上引入圖像的局部梯度以實(shí)現(xiàn)對(duì)像素值更精確的預(yù)測(cè),綜合上述兩種策略改進(jìn)了現(xiàn)有的直方圖平移算法。實(shí)驗(yàn)結(jié)果表明該方案相對(duì)于近年來(lái)的其他方案能夠在保證圖像質(zhì)量的情況下同時(shí)有效提升數(shù)據(jù)嵌入量。2、利用一種基于結(jié)構(gòu)相似性(Structural Similarity Index,SSIM)和動(dòng)態(tài)規(guī)劃算法的率失真優(yōu)化策略在JPEG壓縮的同時(shí)嵌入最優(yōu)水印,試驗(yàn)數(shù)據(jù)表明該方案提高了含水印圖像的率失真性能。3、提出一種基于H.265/HEVC視頻編碼標(biāo)準(zhǔn)的加密域可逆數(shù)字水印方案,并利用它實(shí)現(xiàn)視頻的認(rèn)證加密。同時(shí)實(shí)現(xiàn)內(nèi)容安全性保護(hù)與完整性認(rèn)證。實(shí)驗(yàn)表明該方案不僅能在加密的視頻中嵌入可逆水印,還能對(duì)視頻的篡改進(jìn)行定位。相對(duì)于近幾年的其他方案,本文的方案提高了信息隱藏的容量-失真性能,并實(shí)現(xiàn)了信息隱藏的可逆性,加密域、壓縮域嵌入以及率失真優(yōu)化,也給今后其他的相關(guān)研究提供了一些可行的思路。
[Abstract]:With the improvement of the transmission ability of the Internet and the computer information processing ability, multimedia information can be easily and efficiently spread in the Internet, and people can copy and modify it arbitrarily. In this trend, the content security of multimedia information has become a common concern in the past 20 years. Among many information security technologies, encryption and information hiding technology have become the main means of multimedia information privacy protection, tampering detection, copyright management and so on. If classified according to embedded domain, information hiding technology can be divided into spatial domain (or time domain) and transform domain method, where transform domain method includes encryption domain method proposed in recent years, if classified according to reversibility, It can be divided into reversible information hiding and irreversible information hiding. According to the different categories of information hiding, this paper studies the spatial domain of image and video, the encryption domain and the compressed domain of information hiding, and focuses on the reversibility and capacity-distortion performance of information hiding technology. The content of this paper is divided into three parts: reversible information hiding in spatial domain and its optimization in DCT domain, and reversible watermarking in video encryption domain. These three parts correspond to spatial domain, transform domain and encryption domain method respectively. The main contributions of this paper are as follows: 1. A histogram translation scheme based on pixel gray prediction difference is proposed. First, the Warped Distance algorithm is used to predict the pixel value, and then the local gradient of the image is introduced to achieve more accurate prediction of the pixel value. Based on the above two strategies, the existing histogram translation algorithm is improved. The experimental results show that the proposed scheme can effectively improve the embedding amount of data at the same time, compared with other schemes in recent years, and make use of a structural Similarity IndexSIMI based on structural similarity and the rate distortion of dynamic programming algorithm. The optimal watermark is embedded in the JPEG compression strategy at the same time. The experimental data show that the proposed scheme improves the rate-distortion performance of the image with watermark. A reversible digital watermarking scheme in encryption domain based on H.265/HEVC video coding standard is proposed and used to realize video authentication and encryption. At the same time, the content security protection and integrity authentication are realized. Experiments show that this scheme can not only embed reversible watermark in encrypted video, but also locate the tampering of video. Compared with other schemes in recent years, this scheme improves the capacity distortion performance of information hiding, and realizes the reversibility of information hiding, encryption domain, compression domain embedding and rate distortion optimization. It also provides some feasible ideas for other related research in the future.
【學(xué)位授予單位】：中國(guó)科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TP309

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本文編號(hào)：1873948