-
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
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本书基于MATLAB 5.2版，提供了使用MATLAB的实践性指导。
MATLAB已成为适合多学科、多种工作平台的功能强大、界面友好
、语言自然并且开放性强的大型优秀应用软件，同时也已成为
国内外高等院校高等数学、数值分析、数字信号处理、自动控制
理论以及工程应用等课程的基本教学工具。本书按逻辑编排，
自始至终用实例描述；内容完整且每章相对独立；
是一本简明的MATLAB参考书，既适用于初学者，也适用于高级
MATLAB用户。对MATLAB与FORTRAN、C等语言结合的描述更是所
有MATLAB书籍中少有的一大特色。 本书适合作为理工科高等院
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This code uses lagrange interation to calculte user s position in outdoor case.
- 2011-07-21 00:00:41下载
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Trinh bay cac he thong thong tin
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matlab遗传算法工具箱
GAtool(Matlab toolbox GAtool GA)
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dtc直接转矩控制 开关选择模型 运动控制(the dtc direct torque control switch selection model motion control)
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