%%%%?計算圖像的平均梯度%%?%%%%%%

%讀入圖像
img=imread（‘Mergesym32_15.tif‘）;

%精度轉換
img?=?double（img）;

%獲取圖像大小信息
????[rcb]?=?size（img）;
????dx?=?1;
????dy?=?1;
????for?k?=?1?:?b
????????band?=?img（::k）;
????????dzdx=0.0;
????????dzdy=0.0;
????????[dzdxdzdy]?=?gradient（banddxdy）;
????????s?=?sqrt（（dzdx?.^?2?+?dzdy?.^2）?./?2）;
????????g（k）?=?sum（sum（s））?/?（（r?-?1）?*?（c?-?1））;
????end
%求圖像的平均梯度
MeanGradient=?mean（g）;
MeanGradient

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????????480??2018-04-22?11:23??avegrad1.m
?????文件?????????563??2018-04-22?14:33??RMSE.m
?????文件????????1591??2018-04-22?11:39??xiaobo_f.m
?????文件?????????660??2018-04-22?11:18??xinxishang2.m