Large Capacity Secret Communication Using JPEG2000-BPCS Steganography

隐写术是将秘密数据隐藏或隐藏在一个看似无辜的虚拟容器中的做法。该容器可以是数字静止图像、音频文件或视频文件。提出了一种基于JPEG 2000有损压缩和位平面复杂度分割（BPCS）的隐写方法。利用JPEG 2000压缩的Java软件JJ 2000实现了所提出的JPEG 2000-BPCS隐写算法，并集成了BPCS隐写算法的程序模块。该方法将JPEG 2000静态图像和Motion-JPEG 2000视频作为虚拟容器。在JPEG 2000压缩中，图像的小波系数被量化为比特平面结构，因此BPCS隐写术可以应用于小波域。建议的隐写术克服了缺乏鲁棒性的基于位平面的隐写方法的有损压缩的虚拟数据，一个关键的缺点，阻碍了他们的部署在一个实际的情况下，数据被压缩之前被传输。此外，本文还提出了一种基于3-D集合分层树（SPIHT）算法和BPCS隐写的视频隐写方法。注意，使用有损压缩视频的隐写方法提供了发送大量秘密数据的自然方式。

Steganography is the practice of hiding or camouflaging secret data in an innocent looking dummy container. This container may be a digital still image, audio file, or video file. A steganography method has been presented based on JPEG2000 lossy compression scheme and bit-plane complexity segmentation (BPCS) steganography. The proposed JPEG2000-BPCS steganography was implemented using JJ2000 Java software of JPEG2000 compression, with which the program module for BPCS steganography was integrated. The method covers JPEG2000 still images and Motion-JPEG2000 videos as dummy containers. In JPEG2000 compression, wavelet coefficients of an image are quantized into a bit-plane structure and therefore BPCS steganography can be applied in the wavelet domain. The proposed steganography overcomes the lack of robustness of bit-plane-based steganography methods with respect to lossy compression of dummy data ; a critical shortcoming which have hampered their deployment in a practical scenario where data is compressed before being transmitted. Additionally another video steganography method has been presented based on 3-D set partitioning in hierarchical trees (SPIHT) algorithm and BPCS steganography. Note that a steganography method using lossy compressed video provides a natural way to send a large amount of secret data.