-
dct
M=512 原图像长度
N=64
K=8
I=zeros(M,M)
J=zeros(N,N)
BLOCK=zeros(K,K)
显示原图像
I=imread( f:ceshiyuanshitu.bmp )
figure
imshow(I)
xlabel( 原始图像 )
显示水印图像
J=imread( f:ceshilogistic_nuaa64.bmp )
figure
imshow(J)
xlabel( 水印图像 )
嵌入水印
tem=1
for p=1:N
for q=1:N
x=(p-1)*K+1
y=(q-1)*K+1
BLOCK=I(x:x+K-1,y:y+K-1)
BLOCK=dct2(BLOCK)
if J(p,q)==0
a=-1
else
a=1
end
BLOCK(2,1)=BLOCK(2,1)*(1+a*0.01)
BLOCK=idct2(BLOCK)
I(x:x+K-1,y:y+K-1)=BLOCK
end
end
显示嵌入水印后的图像
figure
imshow(I)
xlabel( 嵌入水印后的图像 )
imwrite(I, f:ceshiembedded.bmp )
- 2010-06-13 18:43:39下载
- 积分：1
-
ARTnn
输入信号五个基于瞬时信息的特征：零中心归一化瞬时幅度功率谱密度的最大值,零中心归一化瞬时幅度绝对值的标准偏差，零中心非弱信号段瞬时相位非线性分量绝对值标准偏差，零中心非弱信号段瞬时相位非线性分量标准偏差，零中心归一化的非弱信号段瞬时频率绝对值的标准偏差，得到识别出的信号类别，本例为2PSK, 4PSK, GMSK, OQPSK, pi/4DQSK中的一个，还可以看Art网络的扩展性。(input signal instantaneous information on five characteristics : In the center is one of the instantaneous rate of the power spectral density of the maximum, is a center to the absolute value of the instantaneous rate of the standard deviation, Non-zero weak signal instantaneous phase of the nonlinear component absolute standard deviation, Non-zero weak signal instantaneous phase of the nonlinear component standard deviation, In the center is one of the non-weak signal of the absolute value of the instantaneous frequency standard deviation, the identification of signal type, The cases of two PSK, 4PSK, GMSK, OQPSK, pi/4DQSK of one, Art can be viewed network scalability.)
- 2007-04-06 09:47:27下载
- 积分：1
-
rkf
自适应步长的Runge-Kutta-Fehlberg法解初问题常微分刚性方程组(Adaptive step size Runge-Kutta-Fehlberg method for solving initial problem of ordinary differential equations)
- 2016-06-05 21:09:48下载
- 积分：1
-
speceffi
To Calculate the Spectral efficiency of a continuous-time AWGN Channel in bits/s/Hz
- 2015-03-20 22:16:11下载
- 积分：1
-
mvdr
这是一个矢量水声器测量。方向的小程序，希望对大家有用(This is a vector hydrophone measurements. The direction of a small program, we hope to be useful)
- 2014-05-26 20:30:14下载
- 积分：1
-
Matlabxuexi
Matlab编程学习课件,非常好的资料赶紧下载(Matlab programming learning courseware, very good information quickly download)
- 2008-04-10 10:56:52下载
- 积分：1
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Berkeley
里面有很多图像边缘检测的算法，可以从提供的网站上下载图片进行操作(There are many edge detection algorithms that can be downloaded from the website to provide pictures to operate)
- 2009-12-18 12:49:24下载
- 积分：1
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src
虚拟声实现：对给定音源(.WAV)使用头相关函数进行变换，改变其距离及角度，含有静态及动态两种模式。(Virtual Sound generation, static and motion.)
- 2020-07-11 10:48:54下载
- 积分：1
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LADRC-Demo
adrc的例程 非常实用 通过调节参数可以看到不同的运行效果(adrc very practical routines by adjusting the parameters you can see the effect of different operating)
- 2015-01-19 23:52:30下载
- 积分：1
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tuxiangfenge
说明： 利用类间方差阈值算法实现图像的分割处理；利用形态学处理进行处理结果修正。
(Threshold using Otsu algorithm image segmentation use of morphological processing for processing the results of correction.)
- 2011-04-11 16:48:03下载
- 积分：1
