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首页> 外文期刊>Information Technology Journal >Reversible Data Hiding for BTC-compressed Images Based on Bitplane Flipping and Histogram Shifting of Mean Tables
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Reversible Data Hiding for BTC-compressed Images Based on Bitplane Flipping and Histogram Shifting of Mean Tables

机译：基于均值表的位平面翻转和直方图移位的BTC压缩图像的可逆数据隐藏

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摘要

Recently, more and more attention have been paid to reversible data hiding techniques for compressed images based on JPEG, JPEG2000, Vector Quantization (VQ) and Block Truncation Coding (BTC). Exiting data hiding schemes in the BTC domain modified the BTC encoding stage or BTC-compressed data according to the secret bits and their embedding capacity was not high and might reduce the image quality. This study introduced the histogram shifting technique to BTC-compressed mean tables to further improve the hiding capacity while maintaining the BTC-compressed image quality. First, the original image was encoded by the BTC technique to obtain the BTC-compressed data which could be represented by a high mean table, a low mean table and a bitplane sequence. Then, the proposed reversible data hiding scheme was performed on the BTC-compressed data. Present hiding scheme contained two main steps, one was the bitplane flipping step that hid secret bits by swapping the high mean and low mean, the other was histogram shifting of the resulting mean tables after swapping. Experimental results showed that our scheme outperformed two existing BTC-based reversible data hiding works, in terms of capacity and efficiency.
机译：最近，基于JPEG，JPEG2000，矢量量化（VQ）和块截断编码（BTC）的压缩图像可逆数据隐藏技术越来越受到关注。 BTC域中的现有数据隐藏方案根据秘密比特修改了BTC编码阶段或BTC压缩数据，并且它们的嵌入能力不高，可能会降低图像质量。这项研究将直方图移位技术引入了BTC压缩的均值表，以进一步提高隐藏能力，同时保持BTC压缩的图像质量。首先，通过BTC技术对原始图像进行编码以获得BTC压缩数据，该数据可以由高均值表，低均值表和位平面序列表示。然后，对BTC压缩数据执行了建议的可逆数据隐藏方案。当前的隐藏方案包含两个主要步骤，一个是位平面翻转步骤，该步骤通过交换高均值和低均值来隐藏秘密位，另一个是交换后所得均值表的直方图移位。实验结果表明，在容量和效率方面，我们的方案优于两项基于BTC的可逆数据隐藏工作。

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