CAJ | 학술논문

提出一种基于光延迟反馈掺铒光纤激光器(ODF-EDFL)混沌系统的彩色图像小波数字水印方法. 在单环掺铒光纤激光器中加入光延迟反馈回路后,随着系数的变化,在一个较大范围内将出现混沌现象. 通过优化后的ODF-EDFL系统混沌序列加密水印图像,将调制好的水印嵌入宿主图像的绿色分量中,即经小波变换后的低频高端部分. 实验结果表明,该算法可较好地嵌入和提取彩色图像的水印,并对图像压缩、加噪和滤波等攻击具有较好的鲁棒性.
제출일충기우광연지반궤참이광섬격광기(ODF-EDFL)혼돈계통적채색도상소파수자수인방법. 재단배참이광섬격광기중가입광연지반궤회로후,수착계수적변화,재일개교대범위내장출현혼돈현상. 통과우화후적ODF-EDFL계통혼돈서렬가밀수인도상,장조제호적수인감입숙주도상적록색분량중,즉경소파변환후적저빈고단부분. 실험결과표명,해산법가교호지감입화제취채색도상적수인,병대도상압축、가조화려파등공격구유교호적로봉성.
A novel wavelet watermark algorithm based on erbium-doped fiber laser with an optical delay feedback (ODF-EDFL) system to encrypt watermark image for color image was proposed. The erbium-doped fiber laser (EDFL) was chaos with coefficients varying in a very wide range when the optical time-delayed system was added on it. The chaotic sequences generated by an ODF-EDFL system were improved to encrypt the binary watermark image. Then the modulated watermark was embedded in the high region of the low frequency band of the green component which had been DWT of the original image. Experimental results show that the proposed method can realize the watermark embedding and extracting on color image and is robust against the attacks of general image processing methods such as JPEG compression,noise,and filtering.