内蒙古师范大学学报(自然科学汉文版)
內矇古師範大學學報(自然科學漢文版)
내몽고사범대학학보(자연과학한문판)
JOURNAL OF INNER MONGOLIA NORMAL UNIVERSITY(NATURAL SCIENCE EDITION)
2015年
4期
528-532
,共5页
图像水印%广义高斯分布模型%脊波变换%乘性嵌入%工作特性曲线
圖像水印%廣義高斯分佈模型%脊波變換%乘性嵌入%工作特性麯線
도상수인%엄의고사분포모형%척파변환%승성감입%공작특성곡선
image watermarking%generalized Gaussian distribution model%ridgelet transform%multi-plicative embeddding%receiver operating characteristic
利用脊波变换具有多方向性和各向异性的特点,提出了一种乘性图像水印算法。在水印嵌入过程中,以中频脊波子带作为水印嵌入空间平衡水印的不可感知性和鲁棒性。在水印检测过程中,采用广义高斯分布来刻画脊波系数的统计分布特性,并通过奈曼皮尔逊准则确定水印系统的检测阈值,给出了水印系统的虚警概率和检测概率之间的工作特性曲线关系。最后通过实验测试了该算法在抗压缩、叠加噪声、缩放、剪切等攻击时的鲁棒性能。仿真结果表明,该算法具有较好的透明性和较强抵抗常用图像处理及几何攻击的能力。
利用脊波變換具有多方嚮性和各嚮異性的特點,提齣瞭一種乘性圖像水印算法。在水印嵌入過程中,以中頻脊波子帶作為水印嵌入空間平衡水印的不可感知性和魯棒性。在水印檢測過程中,採用廣義高斯分佈來刻畫脊波繫數的統計分佈特性,併通過奈曼皮爾遜準則確定水印繫統的檢測閾值,給齣瞭水印繫統的虛警概率和檢測概率之間的工作特性麯線關繫。最後通過實驗測試瞭該算法在抗壓縮、疊加譟聲、縮放、剪切等攻擊時的魯棒性能。倣真結果錶明,該算法具有較好的透明性和較彊牴抗常用圖像處理及幾何攻擊的能力。
이용척파변환구유다방향성화각향이성적특점,제출료일충승성도상수인산법。재수인감입과정중,이중빈척파자대작위수인감입공간평형수인적불가감지성화로봉성。재수인검측과정중,채용엄의고사분포래각화척파계수적통계분포특성,병통과내만피이손준칙학정수인계통적검측역치,급출료수인계통적허경개솔화검측개솔지간적공작특성곡선관계。최후통과실험측시료해산법재항압축、첩가조성、축방、전절등공격시적로봉성능。방진결과표명,해산법구유교호적투명성화교강저항상용도상처리급궤하공격적능력。
A multipllicative image watermarking is proposed by taking advantages of the ridgelet trans-form in this paper.The middle-frequency rideglet wavelet subband is selected as the watermark embedding space.In the detection scheme,the probability density function of ridgelet coefficients is modeled by the generalized Gaussian distribution model,and the watermark decision threshold is obtained by using the Neyman-Pearson (NP)criterion,and the Receiver Operating Characteristic (ROC)curve between the probability of false alarm and the probability of detection is exploited.Finally,the robustness of proposed watermarking is tested when against common image processing attacks such as JPEG compression,additive white Gaussian noise (AWGN ),scaling and cropping,etc.Experimental results demonstrate that the proposed method has good transparency and good robustness.