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已知两个不同图像块亮度数据如下：
（1）分析DCT原理，采用DCT方法，编程并计算相应的DCT系数，分析系数分布特点。
（2）依据视觉特性分析量化表步长的分布特点，完成DCT系数量化。
（3）采用Z形扫描，实现输出数据的统计编码，形成Video stream。
（4）采用IDCT重建图像亮度数据，计算SAD大小，分析产生误差的原因及采用DCT进行数据压缩的原理。（ ）
（5）分别利用左上角1、3、6个系数重建图像，计算相应的SAD，并由
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这是一个用MATLAB实现的把数据隐藏到图片的最低有效位，且不影响图片的视觉效果，对研究LSB算法的同学很有帮助。-This is a MATLAB achieved by hiding the data into the least significant bit images and does not affect the picture of the visual effects, for research students LSB algorithm is very helpful.
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Data hiding in the still image presets a variety of challenges that arises due to the way human visual system (HVS) works and the typical modifications that image undergoes. Additionally, still images priced a relatively small host signal in which to
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The few-color images are often synthetic graphics without complicated color and texture variation, which makes the embedding of invisible digital watermark difficult. This paper proposes a data hiding method that can hide a moderate amount of data in
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Hiding of data in the images
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Reversible data hiding in images
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BMP图像信息隐藏，在不影响图像正常显示的情况下，在24位真彩色BMP图像中隐藏信息。主要是根据BMP图像的文件结构来实现。BMP图像由文件头，信息头，调色板区和数据区组成，而24位真彩色图像中没有调色板信息。此源码主要是在24位真彩色BMP图像中隐藏信息。-BMP image information hiding, without affecting the normal image display cases, in 24-bit true-color BMP images in the h
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related to steganography.
convert data to binery format and hiding one bit in every pixels of BMP images.
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hiding data in images using watermaking
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propose a novel joint data-hiding
and compression scheme for digital images using side match
vector quantization (SMVQ) and image inpainting. The two
functions of data hiding and image compression can be integrated
into one single module seam
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ecently, more and more attention is paid to reversible
data hiding (RDH) in encrypted images, since it maintains
the excellent property that the original cover can be losslessly
recovered after embedded data is extracted while protecting the
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Nowadays, with the rapid growth in formation technology more and more images and data are available on the internet. So there is a need to provide some kind of authentication to such important data. When the sender transmits the image to the receiver
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This paper proposes a lossless, a reversible, and a combined data hiding schemes for public-key-encrypted images by exploiting the probabilistic and homomorphic properties of cryptosystems. With these schemes, the pixel division/reorganization is avo
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reversible Data Hiding in Encrypted Images by Reserving Room Before Encryption
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根据An Improved Reversible Data Hiding in Encrypted Images Using Side Match 这篇文章编写的matlab 程序 文件夹里面有文章和代码(An Improved Reversible Data Hiding in Encrypted Images Using Side Match)
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