【摘要】 提出一种图像的自嵌入水印算法,该算法将图像分块奇异值分解,并提取每块的最大奇异值实施量化生成量化图像。量化图像生成的二值编码经过置乱和混沌加密后嵌入到原始图像的置零位之中。算法不仅能检测和定位对图像的篡改,而且能恢复被篡改图像的内容。实验结果表明篡改定位准确,被损坏的图像内容恢复质量较好。更多还原

【Abstract】 A watermarking algorithm for self-embedding of an image is proposed.The image is divided into small blocks and each block is singular value decomposition.Then the quantization image is obtained by drawing the maximum SVs to be quantized from each block.The binary code of quantization image is scrambled and chaotically encrypted,then it is embedded into LSBs of original image,which are set to zero.The algorithm not only can detect and locate the tampering to image,but also recover the content of the tampered image.Experimental results demonstrate that the locating of tamper can be located accurately and the quality of recovery of damaged image’s content is good.更多还原