基于双重水印的图像篡改检测算法研究

Research on Image Tamper Detection Algorithm Based on Dual Watermarking

双重水印嵌入算法是在当前数字水印技术和信息隐藏技术研究成果的基础上,结合变换域和空间域方面的技术理论,对需要保护的图像进行双重水印嵌入。该算法充分发挥变换域算法水印鲁棒性好、抗攻击能力强和空间域算法水印嵌入量大的优势。采用图像分块检测算法,可降低篡改检测的虚警率,提升检测的精确度和水印的抗攻击性能。基于双重水印的图像篡改检测算法可以很好地对数字图像的真实性和完整性进行验证。

Based on the research results of current digital watermarking technology and information hiding technology,the dual watermark embedding algorithm is used to embed the image to be protected by combining the technical theory of transformation domain and spatial domain.Its purpose is to make full use of the advantages of transform domain algorithm,such as good robustness,strong anti-attack ability and large embedding amount of spatial domain algorithm watermark.By using the image block detection algorithm,the false alarm rate of tamper detection can be reduced,the detection accuracy and the anti-attack performance of the watermark can be improved.The image tamper detection algorithm based on double watermarks can well verify the authenticity and integrity of the digital image,and detect whether the digital image is the original image and has not been tampered by others.