function?Period?=?Arnoldperiod（?N?）
%置亂算法周期
%?輸入：圖像分辨率N
%?輸出：Arnold置亂周期Period
n=1;x=1;y=1;
????while?n~=0;
????????xn=x+y;
????????yn=x+2*y;
????????if（mod（xnN）==1&&mod（ynN）==1）
????????????Period=n;
????????????return;
????????end
????????x=mod（xnN）;
????????y=mod（ynN）;
????????n=n+1;
????end
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-04-20?10:41??watermark_DWT_DCT_1\
?????文件?????????339??2018-03-03?20:06??watermark_DWT_DCT_1\Arnoldperiod.m
?????文件?????????243??2018-03-04?14:56??watermark_DWT_DCT_1\biimage.m
?????文件?????????213??2018-03-25?21:19??watermark_DWT_DCT_1\imageconver.m
?????文件????????3571??2018-03-05?16:40??watermark_DWT_DCT_1\rewater.m
?????文件???????10868??2018-04-20?10:32??watermark_DWT_DCT_1\Watermark.m