function?G=chazhi2（im1uv）??%雙線性插值計算灰度值
G=zeros（256256）;
for?x=1:256
??for?y=1:256
xx?=?x+u（xy）;
yy?=?y+v（xy）;
if?（xx/double（uint8（xx））?==?1.0）?&（yy/double（uint8（yy））?==?1.0）
???????G（xy）?=?im1（uint8（xx）uint8（yy））;
else?if?（xx<1.0）|（yy<1.0）|（xx>=255）|（yy>=255）
???????G（xy）=im1（xy）;
?????else?????????????????????????????????????????????%?a?or?b?is?not?integer
?????a?=?double（uint8（xx））;???????????????????????????
?????b?=?double（uint8（yy））;
?????x11?=?double（im1（ab））;????????????????????????????%?x11?<-?T（ab）
?????x12?=?double（im1（ab+1））;??????????????????????????%?x12?<-?T（ab+1）
?????x21?=?double（im1（a+1b））;??????????????????????????%?x21?<-?T（a+1b）
?????x22?=?double（im1（a+1b+1））;????????????????????????%?x22?<-?T（a+1b+1）
?????G（xy）?=?uint8（?（b+1-yy）?*?（（xx-a）*x21?+?（a+1-xx）*x11）?+?（yy-b）?*?（（xx-a）*x22?+（a+1-xx）?*?x12）?）;?%?calculate?G（xy）
????end
end
??end
end?

?屬性????????????大小?????日期????時間???名稱
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?????文件??????66614??2010-09-12?09:03??GJC\1.bmp

?????文件??????66614??2010-09-12?09:03??GJC\2.bmp

?????文件??????66614??2011-05-20?15:14??GJC\3.bmp

?????文件??????66614??2011-05-20?15:14??GJC\4.bmp

?????文件????????923??2011-05-12?10:35??GJC\chazhi2.m

?????文件????????862??2011-05-11?21:33??GJC\ComputeDerivatives.m

?????文件????????482??2011-05-12?10:41??GJC\guangliu2.m

?????文件????????196??2011-05-10?21:56??GJC\msefunction.m

?????文件????????419??2011-05-12?11:10??GJC\tuxiangpeizhun.m

?????目錄??????????0??2011-05-20?15:14??GJC

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