基于FFT域的手机彩信盲检测图像水印

FFT-Based Image Watermarking in Mobile Color Message with Blind Extraction

移动通信的发展使得手机彩信广泛使用,针对彩信图像的数字权利管理,提出了基于FFT域的高容量、强鲁棒性、盲检测图像水印算法.该算法对图像亮度矩阵的频谱幅度采样点的大小关系进行调制,可以抵抗图像长宽不等任意缩放、图像基本旋转、格式转换以及常规图像处理攻击等对水印系统的影响.该算法运用FFT变换的感知模型,采用自适应的通知编码和通知嵌入技术,控制了水印嵌入的增益,提高图像的保真度,增强抵抗攻击的能力.实验证明,该算法是有效的,可以满足实时计算的要求.

Mobile color message is popular used in rapidly development of mobile communication. For＇ digital fight management（DRM） of color message, the image watermarking algorithm is proposed that can been blind extracted with high capacity and strong robustness in FVr domain. It modulate the watermark information in the magnitude relationship of spectrum amplitude sampling points with resistance to random scale, basic rotation, transform of format and general image processing,etc. The algorithm use FVr based apperception model and adaptive informed coding and imbedding technique to improve the fidelity and robustness while the overflow has been controlled. The results prove its effective and can calculate in real time.