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首页> 外文期刊>Journal of Computers >A Prediction-Based Adaptive Reversible Data Embedding Scheme
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A Prediction-Based Adaptive Reversible Data Embedding Scheme

机译：基于预测的自适应可逆数据嵌入方案

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A reversible data embedding algorithm to adaptively hide a secret message is proposed. The embeddable location is determined by a variance threshold without a location map or overhead information. The proposed algorithm comprises three phases. In the preprocessing phase, the variance thresholds are generated to control the quantity of secret data bits and the image fidelity. In the embedding phase, each block composed of four cover pixels and is manipulated to overlap with blocks to determine a prediction error that arises from the difference between a cover pixel and the average value of its upper and left neighbors. Secret data then embedded in a cover pixel by adding them to the pixel prediction value plus the prediction error. In the extraction and recovering phase, the secret data are extracted in a manner similar to that in which they are embedded, and pixels can be restored to their original values. Experimental results show that the embedding capacity can be adjusted in the proposed scheme. Moreover, the embedding capacity exceeds that of other schemes and the image quality remains satisfactory.
机译：提出了一种自适应隐藏秘密消息的可逆数据嵌入算法。可嵌入的位置由没有位置图或开销信息的方差阈值确定。所提出的算法包括三个阶段。在预处理阶段，将生成方差阈值以控制秘密数据位的数量和图像保真度。在嵌入阶段，每个块均由四个覆盖像素组成，并被操作为与块重叠，以确定由覆盖像素与其上，左相邻像素的平均值之差引起的预测误差。然后，通过将秘密数据加到像素预测值加上预测误差中，将秘密数据嵌入到覆盖像素中。在提取和恢复阶段，以类似于嵌入秘密数据的方式来提取秘密数据，并且可以将像素恢复为其原始值。实验结果表明，该方案可以调整嵌入量。此外，嵌入能力超过其他方案，并且图像质量保持令人满意。

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