boshuhecheng_1

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 )

使用mantlab，计算图像的一阶熵和二阶熵(computer the first-order entropy and the second-order entropy)

BPSK信号在高斯和瑞利信道下的误码率曲线用matlab实现(Modulation and demodulation)

matlab6.5 Figure pattern process source program, it s better to have the books to read consulting together (matlab6.5 Figure pattern p source process rogram. it's better to have the books to read consulting t ogether)

This code simulates Distance Vector Routing protocol used for routing in communication networks

very useful try this

3x3 homography matrix

Star, rhombus in neatbeans.

电气的同学常用的牛顿潮流法的计算过程及其算法原理(Newtonian trend method)

lDPC校验矩阵的环检测。包括4环检测算法，6环检测算法及8环检测算法。还包括一个准循环LDPC奇偶校验矩阵的生成算法。(this algrithm can search cycles in LDPC parity check matrix。It contain cycle-4 cycle-6 cycle-8 test algrithm.It also contains a algrithm for generate the LDPC quasi-cyclic parity check matrix )