數(shù)字視頻水印ppt課件

1、第五章第五章 數(shù)字視頻水印數(shù)字視頻水印第四章 內(nèi)容回顧2021-12-152數(shù)字圖像水印概述數(shù)字水印算法基于HVS的圖像水印魯棒數(shù)字圖像水印脆弱數(shù)字圖像水印第五章 主要內(nèi)容2021-12-153數(shù)字視頻水印基礎(chǔ)魯棒視頻水印算法脆弱視頻水印算法視頻水印幾個特殊問題與方法數(shù)字視頻水印基礎(chǔ)2021-12-154視頻信號處理基礎(chǔ) Color space, sampling, raw video, compression coding, video compression standards.數(shù)字視頻水印基礎(chǔ) 性能要求與特征； 數(shù)字視頻水印的分類。性能要求與特征2021-12-155 除了具有圖像水印的

2、一般特點，還具有如下獨特要求：視頻信息量大，需要盲檢測實時性要求需要與視頻編碼標(biāo)準(zhǔn)結(jié)合應(yīng)能抵抗幀刪除、幀插入、幀重組等視頻編輯處理特有的利用多幀的統(tǒng)計攻擊特有的失真漂移問題視頻水印與圖像水印關(guān)系2021-12-156視頻水印的分類2021-12-157一般圖像水印的分類方法 嵌入域，檢測方式，密鑰，魯棒性，可見性，可逆性等等。按水印與視頻編碼系統(tǒng)結(jié)合方式的不同分類 基于原始視頻的水印前置式）； 基于壓縮視頻的水?。簝?nèi)置式，后置式。與視頻編碼結(jié)合的不同方式2021-12-158MPEG編碼器MPEG解碼器MPEG壓縮碼流原始視頻序列重構(gòu)視頻序列前置嵌入內(nèi)置嵌入后置嵌入原始視頻水印嵌入壓縮視頻水印

3、嵌入壓縮視頻水印檢測原始視頻水印檢測前置提取內(nèi)置提取后置提取原始視頻水印2021-12-159時空域水印算法頻域水印算法缺陷 1經(jīng)過視頻編碼處理后，會造成部分水印信息丟失； 2對于已壓縮的視頻需要先解碼，嵌入水印后，再重新編碼； 3水印信息的引入會導(dǎo)致整體碼流信息的增加。壓縮域視頻水印2021-12-1510頻域水印算法時域水印算法運動矢量水印算法視頻對象水印算法MPEG-4）缺陷 1必須與視頻編解碼標(biāo)準(zhǔn)結(jié)合； 2存在失真漂移問題。第五章 主要內(nèi)容2021-12-1511數(shù)字視頻水印基礎(chǔ)魯棒視頻水印算法脆弱視頻水印算法視頻水印幾個特殊問題與方法魯棒視頻水印2021-12-1512可采用一般魯棒

4、圖像水印方法沿時間軸分布的抗幾何攻擊視頻水印算法 1 Jaap Haitsma and Ton Kalker. A watermarking scheme for digital cinema. Proceedings of International Conference for Image Processing, 2019, 487-489. 2 Zhao Yao and Reginald L. Lagendijk. Video watermarking scheme resistant to geometric attacks. Proceedings of the internatio

5、nal conference on image processing, 2019, Vol.2, II145-II148Niu算法2021-12-1513 Niu Xiamu, Schmucker Martin and Busch Christoph. Video watermarking resisting to rotation, scaling and Translation. Proceeding of the SPIE Security and Watermarking of Multimedia Contents IV, Vol. 4675, 2019, 512-519. 基本思想

6、：1利用模板來推斷所經(jīng)歷的RST變換； 2確定RST變換參數(shù)需要三個點坐標(biāo)。xabxeycdyf 時間模板2021-12-1514擴頻調(diào)制2021-12-1515時間模板的嵌入與檢測2021-12-1516時間模板模板嵌入模板檢測2,( , )( , )( ( , ) 1) ( ),( ,)* ,( ).ijijikkik liv vvF x yF x yx yv kdFx yh v k 實驗結(jié)果2021-12-1517第五章 主要內(nèi)容2021-12-1518數(shù)字視頻水印基礎(chǔ)魯棒視頻水印算法脆弱視頻水印算法視頻水印幾個特殊問題與方法脆弱視頻水印2021-12-1519Spacial tampe

7、ring Similar with image fragile/semi-fragile watermarking; Jae Yeon Park, Jae Hyuck Lim, Gyung Soon Kim and Chee Sun Won. “Invertible Semi-Fragile Watermarking Algorithm Distinguishing MPEG-2 Compression From Malicious Manipulation”. International Conference on Consumer Electronics, 2019, 18-19.Temp

8、oral tampering Frame dropping, insertion, transposition.脆弱視頻水印2021-12-1520Temporal tampering authentication Rui Du, Jessica Fridrich. Lossless Authentication of MPEG-2 Video. Image Processing. 2019. vol.2, pp. 893-896.Two methods Method I: each frame contains its hash embedded losslessly; Method II:

9、 embedding a hash of a group of frames and index in B frame.脆弱視頻水印2021-12-1521Method II All non-zero DCT coefficients from a group of frames form the input for hash calculation. The authentication data is formed by the index of the group of frames and the hash. The extracted frame index is used to d

10、etect tampering with the temporal sequence of frames.用于內(nèi)容認(rèn)證的半脆弱視頻水印算法2021-12-1522曾驍, 陳真勇, 范圍, 陳輝, 熊璋. “用于內(nèi)容認(rèn)證的半脆弱可逆視頻水印算法”. 中國圖象圖形學(xué)報篡改定位視頻水印2021-12-1523篡改定位視頻水印2021-12-1524篡改定位與恢復(fù)視頻水印2021-12-1525Xiao Zeng, Zhenyong Chen, Zhang Xiong. “Self-recovery algorithm based on motion estimation of I-frames fo

11、r compressed video,” Journal of Internet Technology, 2021, 10(5): 591-600 (SCI 517DG)篡改恢復(fù)視頻水印2021-12-1526篡改恢復(fù)視頻水印2021-12-1527第五章 主要內(nèi)容2021-12-1528數(shù)字視頻水印基礎(chǔ)魯棒視頻水印算法脆弱視頻水印算法視頻水印幾個特殊問題與方法視頻水印的幾個特殊問題2021-12-1529“時間同步問題多幀合謀問題失真漂移問題時間同步問題2021-12-1530Temporal synchronization in video watermarking Eugene T. L

12、in and Edward J. Delp; Video and Image Processing Laboratory; Purdue University; Proceedings of the SPIE International Conference on Security and Watermarking of Multimedia Contents IV, vol. 4675, San Jose, CA, pp.478-490, Jan. 2019; Temporal Synchronization in Video Watermarking - Further Studies,

13、2019.時間同步問題2021-12-1531Temporal synchronization problem frame dropping, insertion, transposition, averaging; 1intentional attack; 2network stream video. 導(dǎo)致： 1密鑰失去同步； 2相關(guān)性檢測失去同步。時間同步方法2021-12-1532Assumptions 1symmetric watermarking; 2one frame one key, k(t).時間同步方法2021-12-1533Further studies2021-12-15

14、34改良111(,)(,).iiiEiEiKKT xK KFxH KF x RN，有關(guān)實驗結(jié)果2021-12-1535有關(guān)實驗結(jié)果2021-12-1536有關(guān)實驗結(jié)果2021-12-1537Dvmultiwatermarks2021-12-1538多幀合謀問題2021-12-1539Multiple frame collusion Karen Su, Deepa Kundur, Dimitrios Hatzinakos: Statistical invisibility for collusion-resistant digital video watermarking. IEEE Trans

15、actions on Multimedia,2019, 7(1): 43-51 Master thesis 2019: Digital Video Watermarking Principles for Resistance to Collusion and Interpolation Attacks.Statistical visibility多幀合謀問題2021-12-1540Linear collusionType I collusion: a fixed watermarkType II collusion: independent watermark111( , )( , )( ,

16、)( , ),1,kkkknnnkkkkkkkkkkkXm nUm nm n W m nXXUWn 多幀合謀問題2021-12-1541多幀合謀問題解決辦法2021-12-1542Solution of multiple frame collusion Make watermark statistical invisibility.( , )( , )( , )( , )kkkkXm nUm nm n W m n失真漂移問題2021-12-1543Degradation spread and accumulate Frank Hartung, Bernd Girod. Watermarking of uncompressed and compressed video, Signal Processing, 2019, 283-301失真漂移問題2021-12-1544失真漂移問題2021-12-1545失真漂移問題2021-12-1546可逆水印失真漂移與累積2021-12-1547Xiao Zeng, Zhenyong Chen, and Zhang Xiong. “Issues and Soluti