CAJ | 학술논문

结合 P-Fibonacci 加密算法和模糊归类，提出一种自适应水印新算法。利用 P-Fibonacci 加密具有良好的均匀性及安全性，将水印图像的像素位置打乱，消除了二维数字水印图像的像素空间相关性，使嵌入水印后的块效应降低。对原始载体图像进行分块，结合人类视觉系统的纹理和照度掩蔽特性，得到纹理模糊函数和各图像子块的归类结果，并自适应地确定水印的嵌入强度。对载体图像的各子块进行离散小波变换（DWT），将经 P-Fibonacci 加密算法加密后的水印信息重复嵌入各子块 DWT 域的低频部分。实验结果表明：该算法抗JPEG 压缩、高斯噪声、滤波等常见的信号攻击和几何攻击具有很好的鲁棒性。
결합 P-Fibonacci 가밀산법화모호귀류，제출일충자괄응수인신산법。이용 P-Fibonacci 가밀구유량호적균균성급안전성，장수인도상적상소위치타란，소제료이유수자수인도상적상소공간상관성，사감입수인후적괴효응강저。대원시재체도상진행분괴，결합인류시각계통적문리화조도엄폐특성，득도문리모호함수화각도상자괴적귀류결과，병자괄응지학정수인적감입강도。대재체도상적각자괴진행리산소파변환（DWT），장경 P-Fibonacci 가밀산법가밀후적수인신식중복감입각자괴 DWT 역적저빈부분。실험결과표명：해산법항JPEG 압축、고사조성、려파등상견적신호공격화궤하공격구유흔호적로봉성。
A new adaptive watermarking algorithm based on P-Fibonacci encryption and fuzzy classified is proposed.The P-Fibonacci encryption has a good uniformity and safety,disrupting the watermark image′s pixel position by P-Fibonacci encryption algorithm,which can eliminate the spatial correlation of the two-dimensional digital watermark image pixels, and ultimately,reducing the blockiness when embedding watermark information.Simultaneously,blocked the original carrier image,and according to the texture and illumination masking characteristics of the human visual system,obtained a fuzzy function which based on the texture characteristics of the original image,establishing the texture fuzzy function and the classification results of each sub-block,according to the results,determined the embedding strength adaptively. Then discrete wavelet transform (DWT)is performed on the sub-images,and the encrypted watermarks were embedded in the low frequency of the DWT domain repeatedly.The experimental results show that the presented algorithm has a good robustness against common signal processing attacks such as JPEG compression,Gaussian noise,filtering and geo-metric attack such as cropping.