Reversible data hiding in encrypted images
Reversible data hiding in encrypted images
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DOI：
10.1109/icitech.2017.8079951
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发表时间：
2017-05
期刊：
影响因子：
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通讯作者：
Nour Kittawi;A. Al-Haj
中科院分区：
文献类型：
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作者：
Nour Kittawi;A. Al-Haj
以一种不影响原始封面图像像素或在提取该信息后造成永久失真的方式隐藏图像中的信息称为可逆数据隐藏技术。许多可逆数据隐藏方案已被提出并成功应用于医学和军事领域。这些方案是为了保证数字图像的真实性和完整性，而不会对原始图像造成任何失真。它们保证任何更改水印图像的尝试都将被图像所有者检测到。本文提出了一种新的算法，以可分离的方式将数据可逆地隐藏到加密的灰度医学图像中。该算法在给定的加密图像中隐藏两个水印。采用数据隐藏密钥替换选定的加密图像像素嵌入第一个水印，采用直方图移位可逆数据隐藏方法嵌入第二个水印。实验结果表明，该算法具有高嵌入容量、高视觉图像质量和高熵的特点。
Hiding information in an image in a way that does not affect the original cover image pixels or cause a permanent distortion after extracting that information is known as reversible data hiding technology. Many reversible data hiding schemes have been proposed and successfully applied in medical and military applications. Such schemes are developed to ensure digital images' authenticity and integrity without any distortion on the original images. They guarantee that any attempt to change the watermarked image will be detected by the image owner. In this paper, a novel algorithm is proposed to reversibly hide data into encrypted grayscale medical images in a separable manner. The proposed algorithm hides two watermarks in a given encrypted image. The first watermark is embedded by replacing selected encrypted image pixels based on data hiding key, and the second watermark is embedded in the watermarked encrypted image using the histogram shifting reversible data hiding method. The experimental results demonstrate that the proposed algorithm has high embedding capacity, high visual image quality, and high entropy.