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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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图像的组成无非是一些字符串或者一些字节组成的字符串，然而，每一个字节数据位的重要度并不是一样的，两个相邻字节往往只有低位是不一样的。例如：00100110和00100111代表了两个不同渐变度的红色，但是就人眼是分辨不出来的。最低有效位LSB算法，就是利用这一点，达到图像压缩，或者数字水印的功能。-The composition of the image is nothing more than some number of bytes or string composed of string,
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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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steganography tool for hiding data in image using LSB hiding technique
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数据隐藏，做为一中隐蔽、嵌入的形式，
可以进行数字媒体数据的识别，注释和版权保护。-Data hiding,a form of steganography,embeds
data into digital media for the purpose of
identification,annotation,and copyright.
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DCT-based Data hiding: dataHide.m Hide the logo image into the original
dataExtract.m Extract the logo image from the original findData.m Verify the robustness of the data hiding method 。and use jpeg compress
-DCT-based Data hiding: dataHide.m H
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watermarking is the art of hiding data to provide authenticity and security.
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Owing to the broad application value of audio
watermarking in remote transmission and mobile
extraction, it is very important to study watermarking
approaches against A/D and D/A conversion. Based
on wavelet decomposition and cepstrum technol
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Owing to the broad application value of audio
watermarking in remote transmission and mobile
extraction, it is very important to study watermarking
approaches against A/D and D/A conversion. Based
on wavelet decomposition and cepstrum technol
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this the sample of matlab coding for echo hiding data audio steganography... use your own input-this is the sample of matlab coding for echo hiding data audio steganography... use your own input
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Paper on reversible data hiding
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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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实现数据图像隐藏，无损数据隐藏，是2002年thidi&tian发表论文中的方法，现用MATLAB实现-For data hiding, lossless data hiding, is published in 2002 thidi & tian paper method is achieved using MATLAB
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secret hiding of data can be done by using this
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The code implements the following paper:
Guorong Xuan, Jiang Zhu, Jidong Chen, Shi Y.Q., Zhicheng Ni, Wei Su, "Distortionless data hiding based on integer wavelet transform" IET Electronics Letters, Volume: 38, Issue 25, page 1646- 1648, Decembe
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this code is used to do data hiding in image and then take it back ..........pandey
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Reversible data hiding in matlab for ppt
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some useful matlab code for data hiding for example psnrcompare wavelet transform arnold transform and -some useful matlab code for data hiding for example psnrcompare wavelet transform arnold transform and ...
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Distortionless Data Hiding, using matlab
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文件主要通过matlab实现图像的数据隐藏，以及相关优化代码(File is mainly achieved through MATLAB, image data hiding, and related optimization code)
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