The rapid development of the internet allows digital media being easily delivered, copied and even tampered. The watermarking issue has thus focused mainly on the medium of authentication. In this study, an efficient self-embedding watermarking scheme for colour image authentication is proposed. The scheme is designed to achieve tamper proofing and high-quality recovery. The scheme is efficient because the validity of image blocks is simply proofed by using a dual-option parity-check method and morphological operations. The former is used to generate authentication information for obtaining better results of tamper proofing and the latter is used to further improve the neighbouring connectivity of the proofing results. To achieve high-quality recovery of the tampered image, the feature information of the host colour image and its corresponding block-edge-pattern information are properly organised to embed into three colour components of the host colour image. Meanwhile, the embedding information is appropriately distributed over luminance and chrominance components of the colour image in the YCbCr colour space such that the quality of the watermarked image can be better obtained. The simulation results show that the proposed watermarking scheme can effectively proof the tempered region with high detection rate and can restore the tempered region with high quality.
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机译：互联网的飞速发展使得数字媒体易于传递，复制甚至被篡改。因此，水印问题主要集中在认证的介质上。在这项研究中，提出了一种用于彩色图像认证的有效的自嵌入水印方案。该方案旨在实现防篡改和高质量恢复。该方案是有效的，因为通过使用双选项奇偶校验方法和形态学运算可以简单地证明图像块的有效性。前者用于生成认证信息，以获得更好的防篡改结果，而后者用于进一步改善打样结果的邻近连接性。为了实现篡改图像的高质量恢复，适当地组织宿主彩色图像的特征信息及其对应的块边缘图案信息以嵌入宿主彩色图像的三个颜色分量中。同时，将嵌入信息适当地分布在YC b C r 颜色空间中的彩色图像的亮度和色度分量上，以使水印图像的质量更好。获得。仿真结果表明，所提出的水印方案可以有效地检测出回火区域，检出率高，并且可以高质量地恢复回火区域。
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