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CGHwatermarkmatlabcode
说明： 关于半色调编码计算全息图的信息隐藏Matlab程序的说明：
算法实现主程序为CGHwatermark；
位相恢复函数为phaseSL；
用计算全息记录已知振幅和位相的复波前函数为Hologen；
半色调编码函数为AMhalftone；
嵌入信息的提取直接调用Matlab自带的FFT2函数；
主程序的函数调用关系如下
读入宿主信息和水印信息-----------phaseSL--->Hologen--->AMhalftone(完成嵌入)--->FFT2（提取水印信息）
主程序结果保存于holo&mark文件夹
对算法鲁棒性测试的程序：
1. 对于剪切操作 Cliptest 结果存放于cliptest文件夹
2. 对于缩放操作 zoomtest 结果存放于zoomtest文件夹
3. 对于旋转操作 rotatetest 结果存放于rotate文件夹
4. 对于滤波操作 filtertest 结果存放于filtertest文件夹
5. 测试算法的时间效率 timetest
6. 分析嵌入信息后图像质量与参数alpha，tao的关系 msetest(err)
- 2008-09-09 10:14:23下载
- 积分：1
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VistaRestoreTools1.0
denoise
In BayesShrink[5] we determine the threshold for
each subband assuming a Generalized Gaussian
Distribution(GGD) . The GGD is given by
GG¾ X ¯ (x) = C(¾ X ¯ )exp¡ [® (¾ X ¯ )jxj]¯ (6)
¡ 1 < x < 1 ¯ > 0, where
® (¾ X ¯ ) = ¾ ¡ 1
X [ ¡ (3=¯ )
¡ (1=¯ ) ]1=2
and
C(¾ X ¯ ) = ¯ ¢ ® (¾ X ¯ )
2¡ ( 1
¯ )
and ¡ (t) =
R1
0 e¡ uut¡ 1du.
The parameter ¾ X is the standard deviation and ¯
is the shape parameter It has been observed[5] that
with a shape parameter ¯ ranging from 0.5 to 1, we
can describe the the distribution of coefficients in a
subband for a large set of natural images.Assuming
such a distribution for the wavelet coefficients, we empirically
estimate ¯ and ¾ X for each subband and try
to find the threshold T which minimizes the Bayesian
Risk, i.e, the expected value of the mean square error.
- 2012-06-08 01:38:48下载
- 积分：1
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New-Folder
this code is to remove the noise from video...........................
- 2011-09-23 20:12:41下载
- 积分：1
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PVbattery
光伏电池pv模型,能够输出光照强度和温度变化时的P-U曲线和I-U曲线(Pv photovoltaic cell model)
- 2016-01-11 13:03:59下载
- 积分：1
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szjhq
基于MATLAB的数字均衡器
设计与实现
(MATLAB-based Design and Implementation of Digital Equalizer)
- 2009-10-19 12:33:12下载
- 积分：1
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cum4
说明： 计算四阶累积量 基于四阶累积量的DOA估计方法，同MUSIC-like方法一样，有很好的估计性能(Fourth order cumulant calculation of fourth-order cumulant based DOA estimation methods, with the MUSIC-like methods, have a good estimation performance)
- 2011-03-24 16:03:02下载
- 积分：1
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matlab.study
这是本人精心做的,真的做的不好,我也是费了好大的心力来研究这个工作,也是我第一次来做关于matlab的源程序(this is carefully done, I really do not, and I also spent a lot of effort to study the work, is the first time I have to do on the source Matlab)
- 2007-02-10 23:44:41下载
- 积分：1
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ThreePhase_ACDCAC_PMWconverter_2
statcom using hysteresis current control technique
- 2012-06-29 14:57:28下载
- 积分：1
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CameraFingerprint_1.0
利用PRNU的图像指纹识别算法，可用于进行图像认证，来源辨别等。主要用于数字图像取证方面。(PRNU image use fingerprint recognition algorithm, can be used for image authentication, and other sources to identify. Mainly used for digital image forensics.)
- 2021-03-02 11:29:34下载
- 积分：1
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A-Guide-to-MATLAB-for-Beginners-and-Experienced-U
A matlab guide book.
- 2012-04-17 20:12:28下载
- 积分：1
