%?Function?“d2dgauss.m“:?
%?This?function?returns?a?2D?edge?detector?（first?order?derivative?
%?of?2D?Gaussian?function）?with?size?n1*n2;?theta?is?the?angle?that?
%?the?detector?rotated?counter?clockwise;?and?sigma1?and?sigma2?are?the?
%?standard?deviation?of?the?gaussian?functions.?
function?h?=?d2dgauss（n1sigma1n2sigma2theta）?
r=[cos（theta）?-sin（theta）;?
sin（theta）?cos（theta）];?
for?i?=?1?:?n2?
????for?j?=?1?:?n1?
????????u?=?r?*?[j-（n1）/2?i-（n2）/2]‘;?
????????h（ij）?=?gauss（u（1）sigma1）*dgauss（u（2）sigma2）;?
????end?
end?
h?=?h?/?sqrt（sum（sum（abs（h）.*abs（h））））;?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2011-09-17?18:58??gauss-lena\
?????文件?????1178678??2011-09-19?15:49??gauss-lena\4-lena.bmp
?????文件?????????591??2011-09-17?17:29??gauss-lena\d2dgauss.m
?????文件?????????129??2011-09-17?17:29??gauss-lena\dgauss.m
?????文件??????????98??2011-09-17?17:29??gauss-lena\gauss.m
?????文件????????2040??2011-09-19?15:37??gauss-lena\main-gauss-lena.m