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%%%%?計算一副圖像的信息熵?%%%%
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%?作者：劉建華?時間：2008.6.9?%
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%讀入圖像
%如需計算多幅圖像，只需修改名稱即可
img=imread（‘gs3r.jpg‘）;


%獲取圖像行列號
[MN]=size（img）;

%生成值為零的初始化數組。其用來統計和存儲對應于每個
%灰度級的頻數（概率），數組的大小根據圖像的大小而定
temp=zeros（MN）;

figureimshow（img）;

%對圖像的灰度值做統計，計算每個灰度級出現的次數
for?m=1:M;
????for?n=1:N;
????????if?img（mn）==0;
???????????i