www.gusucode.com > 采用混沌和小波相结合的方式实现的图像加密matlab源码程序 > code/hundungen.m
function e=hundungen(M,N,key0) for(i=1:200) key0=3.925*key0*(1-key0); end key1=3.925; for(i=1:M) for(j=1:N) key0=key1*key0*(1-key0); a(i,j)=key0; end end key3=0.2; key2=3.925; for(i=1:M) for(j=1:N) key3=key2*key3*(1-key3); b(i,j)=key3; end end key4=0.3; key2=3.925; for(i=1:M) for(j=1:N) key4=key2*key4*(1-key4); c(i,j)=key4; end end t=0.4; w0=0.2; w1=0.5; w2=0.3; w=(1-t)^2*w0+2*t*(1-t)*w1+t^2*w2; for(i=1:M) for(j=1:N) P(i,j)=(1-t)^2*a(i,j)*w0+2*t*(1-t)*b(i,j)*w1+t^2*c(i,j)*w2; % d(i,j)=P(i,j)/w; d(i,j)=P(i,j); end end x=d; e=round(x*255); end