程式如下：
void CMyDlg::OnHuiDuGongSheng()
{
// TODO: Add your command handler code here
engEvalString(ep,"Gray=imread('121.bmp');");
engEvalString(ep,"[M,N,O] = size(Gray);");
engEvalString(ep,"M = 128;");
engEvalString(ep,"N = 128;");
//為了減少計算量，對原始影像灰度級壓縮，將Gray量化成16級
engEvalString(ep,"for i = 1:M;\
for j = 1:N;\
for n = 1:256/16;\
if (n-1)*16<=Gray(i,j)&&Gray(i,j)<=(n-1)*16+15;\
Gray(i,j) = n-1;\
end;\
end;\
end;\
end;");
//計算四個共生矩陣P,取距離為1，角度分別為0,45,90,135
engEvalString(ep,"P = zeros(16,16,4);");
engEvalString(ep,"for m = 1:16;\
for n = 1:16;\
for i = 1:M;\
for j = 1:N;\
if j<N&&Gray(i,j)==m-1&&Gray(i,j+1)==n-1;\
P(m,n,1) = P(m,n,1)+1;\
P(n,m,1) = P(m,n,1);\
end;\
if i>1&&j<N&&Gray(i,j)==m-1&&Gray(i-1,j+1)==n-1;\
P(m,n,2) = P(m,n,2)+1;\
P(n,m,2) = P(m,n,2);\
end;\
if i<M&&Gray(i,j)==m-1&&Gray(i+1,j)==n-1;\
P(m,n,3) = P(m,n,3)+1;\
P(n,m,3) = P(m,n,3);\
end;\
if i<M&&j<N&&Gray(i,j)==m-1&&Gray(i+1,j+1)==n-1;\
P(m,n,4) = P(m,n,4)+1;\
P(n,m,4) = P(m,n,4);\
end;\
end;\
end;\
if m==n;\
P(m,n,:) = P(m,n,:)*2;\
end;\
end;\
end;");
//對共生矩陣歸一化
engEvalString(ep,"for n = 1:4;\
P(:,:,n) = P(:,:,n)/sum(sum(P(:,:,n)));\
end;");
//對共生矩陣計算能量、熵、慣性矩、相關4個紋理引數
engEvalString(ep,"H = zeros(1,4);");
engEvalString(ep,"I = H;");
engEvalString(ep,"Ux = H;");
engEvalString(ep,"Uy = H;");
engEvalString(ep,"deltaX= H;");
engEvalString(ep,"deltaY = H;");
engEvalString(ep,"C =H;");
engEvalString(ep,"for n = 1:4;\
E(n) = sum(sum(P(:,:,n).^2));\
for i = 1:16;\
for j = 1:16;\
if P(i,j,n)~=0;\
H(n) = -P(i,j,n)*log(P(i,j,n))+H(n);\
end;\
I(n) = (i-j)^2*P(i,j,n)+I(n);\
Ux(n) = i*P(i,j,n)+Ux(n);\
Uy(n) = j*P(i,j,n)+Uy(n);\
end;\
end;\
end;");
engEvalString(ep,"for n = 1:4;\
for i = 1:16;\
for j = 1:16;\
deltaX(n) = (i-Ux(n))^2*P(i,j,n)+deltaX(n);\
deltaY(n) = (j-Uy(n))^2*P(i,j,n)+deltaY(n);\
C(n) = i*j*P(i,j,n)+C(n);\
end;\
end;\
C(n) = (C(n)-Ux(n)*Uy(n))/deltaX(n)/deltaY(n);\
end;");
//求能量、熵、慣性矩、相關的均值和標準差作為最終8維紋理特征
engEvalString(ep,"T(1) = mean(E);");
engEvalString(ep,"T(2) = mean(H);");
engEvalString(ep,"T(3) = mean(I);");
engEvalString(ep,"T(4) = mean(C);");
// engEvalString(ep,"fprintf('%f,%f,%f,%f',T(1),T(2),T(3),T(4));");
engEvalString(ep,"xlswrite('testdata.xls', [T(1) T(2) T(3) T(4)], 'B2:H2');");
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標籤：數據庫及相關技術
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