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%%%%?計算圖像的平均梯度%%?%%%%%%
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%%?作者：劉建華?時間：2008.6.9?%%
%%%%%%%%?QQ：76424677???%%%%%%%
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%%%?????共享改變未來！???????%%%

%讀入兩幅圖像
img=imread（‘name.jpg‘）

%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）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????665??2009-06-19?11:30??avegrad\avegrad.m

?????文件????1058883??2007-11-19?13:56??avegrad\JPEG?Specification\ITU-T.81.pdf

?????文件??????17183??2011-06-03?10:19??avegrad\JPEG?Specification\JPEG?File?Interchange?Format.pdf

?????文件??????????0??2011-06-03?10:39??avegrad\有關于求取圖像平均梯度的matlab?M?文件avegrad；可以為你省去那么一點時間。?———共享改變未來！———.txt

?????目錄??????????0??2011-06-03?10:40??avegrad\JPEG?Specification

?????目錄??????????0??2011-06-03?10:41??avegrad

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??????????????1076731????????????????????6