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A dual-tamper-detection method for digital image authentication and content self-recovery

机译：数字图像认证和内容自恢复的双篡改检测方法

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This paper proposes an approach to protect image content against malicious tampering based on watermarking technology. The watermark is composed of two kinds of check bits which are used for tampered region localization, and one recovery bit which is used for image recovery and is embedded into the three-Least Significant Bit planes of the original image. The first check bit is generated by applying the proposed Parity Check Bit Labeled method to each pixel, and the other is generated by employing hashing algorithm to each block after image decomposition. The superposition result detected from the two check bits contributes to lowering the probability of false-negative errors. Moreover, we propose a post-processing method Adaptive Structural Element Calculation which improves the accuracy of tamper detection result further. Experimental results show that our algorithm has good performance in keeping high quality of recovered image, and meanwhile improving the accuracy of tamper detection result.
机译：本文提出了一种保护图像内容免受基于水印技术的恶意篡改的方法。水印由用于篡改区域定位的两种检查位组成，以及用于图像恢复的一个恢复位，并且嵌入到原始图像的三个最有效位平面中。通过将所提出的奇偶校验位标记的方法应用于每个像素来生成第一检查位，并且通过在图像分解之后采用散列算法来生成另一个。从两个检查位检测到的叠加结果有助于降低假阴性错误的概率。此外，我们提出了一种后处理方法自适应结构元件计算，其进一步提高了篡改检测结果的准确性。实验结果表明，我们的算法在保持高质量的恢复图像方面具有良好的性能，同时提高了篡改检测结果的准确性。

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