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%?chaosfun.m?
%?Xie-Hua?Sun??2003.08.05
%?chaosfun（Np）
%?N?矩陣N*N的寬度，p發(fā)生混沌序列的初始值，即密鑰　
%?用Logistic映射x<--4*x*（1-x）產(chǎn)生混沌建立12...N*N的一個(gè)重排
%?算法：?????????????????????????????????????????????????????????????????????????
%?C=chaosfun（N）1<=C（1）C（2）...C（N*N）<=N*N????????????????????????????????????????????
%?對(duì)于?N*N?圖像矩陣?存在一一對(duì)應(yīng)關(guān)系（pq）<-->（p-1）*N+q，因此，置換變成??????????
%?123...N*N?與它的一個(gè)排列的對(duì)應(yīng)　　　　　　　　　　　　　　　　　　　　　　?
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function?C=chaosfun（Np）
M=N*N;
u=p;
position_flag（M）=0;???%?賦初始值，表示數(shù)值12...M均未被賦值

for?i=1:M
??u=4*u*（1-u）;
??v=ceil（M*u）;
??if（?position_flag（v）==0）
????C（i）=v;
????position_flag（v）=1;
??else
????flag=1;
????while?flag==1
??????u=4*u*（1-u）;v=ceil（M*u）;
??????if?（position_flag（v）==0）
????????C（i）=v;
????????position_flag（v）=1;
????????flag=0;
??????end
????end????
??end
end

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件??????196662??2005-07-02?14:18??ChaosScrambl\boats.bmp
?????文件????????1084??2012-03-05?20:57??ChaosScrambl\chaosfun.m
?????文件???????66614??2012-03-19?08:56??ChaosScrambl\scrambl.bmp
?????文件????????1944??2012-03-18?23:46??ChaosScrambl\scramblTest.m
?????文件????????1646??2012-03-05?21:22??ChaosScrambl\scrambling.asv
?????文件????????1677??2012-03-19?08:58??ChaosScrambl\scrambling.m
?????目錄???????????0??2013-03-16?21:21??ChaosScrambl\