资源简介
MATLAB 灰度共生矩阵 纹理特征提取 粗糙度、对比度、方向度等,源代码
代码片段和文件信息
% function Texture = Tamuratexture(gray)
%计算Tamura纹理特征
% t0=cputime;
I0=imread(‘LENA.BMP‘);
I = rgb2gray(I0);
[NxNy] = size(I);
Ng=256;
G=double(I);
%计算粗糙度(coarseness)
Sbest=zeros(NxNy);
E0h=zeros(NxNy);
E0v=zeros(NxNy);
E1h=zeros(NxNy);
E1v=zeros(NxNy);
E2h=zeros(NxNy);
E2v=zeros(NxNy);
E3h=zeros(NxNy);
E3v=zeros(NxNy);
E4h=zeros(NxNy);
E4v=zeros(NxNy);
E5h=zeros(NxNy);
E5v=zeros(NxNy);
flag=0;
for i=1:Nx
for j=2:Ny
E0h(ij)=G(ij)-G(ij-1);
end
end
E0h=E0h/2;
for i=1:Nx-1
for j=1:Ny
E0v(ij)=G(ij)-G(i+1j);
end
end
E0v=E0v/2;
%图片大小必须大于4*4才能计算E1h、E1v
if (Nx<4||Ny<4)
flag=1;
end
if(flag==0)
for i=1:Nx-1
for j=3:Ny-1
E1h(ij)=sum(sum(G(i:i+1j:j+1)))-sum(sum(G(i:i+1j-2:j-1)));
end
end
for i=2:Nx-2
for j=2:Ny
E1v(ij)=sum(sum(G(i-1:ij-1:j)))-sum(sum(G(i+1:i+2j-1:j)));
end
end
E1h=E1h/4;
E1v=E1v/4;
end
%图片大小必须大于8*8才能计算E2h、E2v
if (Nx<8||Ny<8)
flag=1;
end
if(flag==0)
for i=2:Nx-2
for j=5:Ny-3
E2h(ij)=sum(sum(G(i-1:i+2j:j+3)))-sum(sum(G(i-1:i+2j-4:j-1)));
end
end
for i=4:Nx-4
for j=3:Ny-1
E2v(ij)=sum(sum(G(i-3:ij-2:j+1)))-sum(sum(G(i+1:i+4j-2:j+1)));
end
end
E2h=E2h/16;
E2v=E2v/16;
end
%图片大小必须大于16*16才能计算E3h、E3v
if (Nx<16||Ny<16)
flag=1
end
if(flag==0)
for i=4:Nx-4
for j=9:Ny-7
E3h(ij)=sum(sum(G(i-3:i+4j:j+7)))-sum(sum(G(i-3:i+4j-8:j-1)));
end
end
for i=8:Nx-8
for j=5:Ny-3
E3v(ij)=sum(sum(G(i-7:ij-4:j+3)))-sum(sum(G(i+1:i+8j-4:j+3)));
end
end
E3h=E3h/64;
E3v=E3v/64;
end
%图片大小必须大于32*32才能计算E4h、E4v
if (Nx<32||Ny<32)
flag=1;
end
if(flag==0)
for i=8:Nx-8
for j=17:Ny-15
E4h(ij)=sum(sum(G(i-7:i+8j:j+15)))-sum(sum(G(i-7:i+8j-16:j-1)));
end
end
for i=16:Nx-16
for j=9:Ny-7
E4v(ij)=sum(sum(G(i-15:ij-8:j+7)))-sum(sum(G(i+1:i+16j-8:j+7)));
end
end
E4h=E4h/256;
E4v=E4v/256;
end
%图片大小必须大于64*64才能计算E5h、E5v
if (Nx<64||Ny<64)
flag=1;
end
if(flag==0)
for i=16:Nx-16
for j=33:Ny-31
E5h(ij)=sum(sum(G(i-15:i+16j:j+31)))-sum(sum(G(i-15:i+16j-32:j-31)));
end
end
for i=32:Nx-32
for j=17:Ny-15
E5v(ij)=sum(sum(G(i-31:ij-16:j+15)))-sum(sum(G(i+1:i+32j-16:j+15)));
end
end
E5h=E5h/1024;
E5v=E5v/1024;
end
for i=1:Nx
for j=1:Ny
[maxvindex]=max([E0h(ij)E0v(ij)E1h(ij)E1v(ij)E2h(ij)E2v(ij)E3h(ij)E3v(ij)E4h(ij)E4v(ij)E5h(ij)E5v(ij)]);
k=floor((index+1)/2);
Sbest(ij)=2.^k;
end
end
Fcoarseness=sum(sum(Sbest))/(Nx*Ny);
%计算对比度
[countsgraylevels]=imhist(I);
PI=counts/(Nx*Ny);
averagevalue=sum(g
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 786486 2000-08-28 12:02 Tamuratexture\LENA.BMP
文件 5051 2013-07-17 21:01 Tamuratexture\Tamuratexture.m
目录 0 2013-07-17 21:11 Tamuratexture
----------- --------- ---------- ----- ----
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