A JPEG-Compression Resistant Adaptive Steganography Based on Relative Relationship between DCT Coefficients
A JPEG-Compression Resistant Adaptive Steganography Based on Relative Relationship between DCT Coefficients
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DOI：
10.1109/ares.2015.53
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发表时间：
2015-08
期刊：
影响因子：
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通讯作者：
Yi Zhang;Xiangyang Luo;Chunfang Yang;Dengpan Ye;Fenlin Liu
中科院分区：
文献类型：
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作者：
Yi Zhang;Xiangyang Luo;Chunfang Yang;Dengpan Ye;Fenlin Liu
目前典型的自适应隐写算法在压缩后不能正确提取嵌入的秘密信息。为了解决这一问题，提出了一种抗JPEG压缩的自适应隐写算法。利用DCT系数之间的关系，确定消息的嵌入域。不同DCT系数的修正幅度可以根据JPEG压缩的品质因数来确定。为了确保JPEG压缩后嵌入消息的完全正确提取，采用RS码对要嵌入的消息进行编码。此外，基于PQE隐写中的当前能量函数和J-UNIWARD隐写中的失真函数，计算出相应的DCT系数的畸变值。在此基础上，利用空时编码将编码后的信息嵌入到失真值较小的DCT系数中。在不同JPEG压缩质量因子和不同有效载荷下的实验结果表明，该算法不仅具有较高的信息提取正确率，与JPEG压缩质量因子为75的J-UNIWARD隐写算法相比，正确率从60%左右提高到近100%，而且具有较强的抗检测性能。
Current typical adaptive Steganography algorithms cannot extract the embedded secret messages correctly after compression. In order to solve this problem, a JPEG-compression resistant adaptive steganography algorithm is proposed. Utilizing the relationship between DCT coefficients, the domain of messages embedding is determined. The modifying magnitude of different DCT coefficients can be determined according to the quality factors of JPEG compression. To ensure the completely correct extraction of embedded messages after JPEG compression, the RS codes is used to encode the messages to be embedded. Besides, based on the current energy function in the PQe steganography and the distortion function in J-UNIWARD Steganography, the corresponding distortion value of DCT coefficients is calculated. With the help of that, STCs is used to embed the encoded messages into the DCT coefficients, which have a smaller distortion value. The experimental results under different quality factors of JPEG compression and different payloads demonstrate that the proposed algorithm not only has a high correct rate of extracted messages after JPEG compression, which increases from about 60% to nearly 100% comparing with J-UNIWARD steganography under quality factor 75 of JPEG compression, but also has a strong detection resistant performance.