function?F=NPCR（II1）??????????%I為原始圖像，I1為改變I的一個像素值后的圖像
[mn]=size（I）;
for?i=1:m
????for?j=1:n
????????I2（ij）=double（I（ij））;
????????I3（ij）=double（I1（ij））;
????end
end
b=m*n;
h=0;
for?i=1:m
???for??j=1:n
?????if?（I2（ij）==I3（ij））;
?????????h=h;
?????else?h=h+1;
?????end
???end
end
F=h/b;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????????332??2015-07-14?15:26??NPCR&UACI\NPCR.m
?????文件?????????302??2014-05-03?15:41??NPCR&UACI\UACI.m
?????目錄???????????0??2019-08-26?11:43??NPCR&UACI\