function y = div(I)
% 分割
M =3; %3*3
[m,n]=size(I);
H = fix(m/M); L= fix(n/M);
aveg1=zeros(H,L);
var1=zeros(H,L);
% 计算每一块的平均值
for x=1:H;
for y=1:L;
aveg=0;var=0;
for i=1:M;
for j=1:M;
aveg=I(i+(x-1)*M,j+(y-1)*M)+aveg;
end
end
aveg1(x,y)=aveg/(M*M);
% 计算每一块的方差值
for i=1:M;
for j=1:M;
var=(I(i+(x-1)*M,j+(y-1)*M)-aveg1(x,y)).^2+var;
end
end
var1(x,y)=var/(M*M);
end
end
Gmean=0;Vmean=0;
for x=1:H
for y=1:L
Gmean=Gmean+aveg1(x,y);
Vmean=Vmean+var1(x,y);
end
end
Gmean1=Gmean/(H*L);%所有块的平均值
Vmean1=Vmean/(H*L);%所有块的方差
gtemp=0;gtotle=0;vtotle=0;vtemp=0;
for x=1:H
for y=1:L
if Gmean1>aveg1(x,y)
gtemp=gtemp+1;
gtotle=gtotle+aveg1(x,y);
end
if Vmean1<var1(x,y)
vtemp=vtemp+1;
vtotle=vtotle+var1(x,y);
end
end
end
G1=gtotle/gtemp;V1=vtotle/vtemp;
gtemp1=0;gtotle1=0;vtotle1=0;vtemp1=0;
for x=1:H
for y=1:L
if G1<aveg1(x,y)
gtemp1=gtemp1-1;
gtotle1=gtotle1+aveg1(x,y);
end
if 0<var1(x,y)<V1
vtemp1=vtemp1+1;
vtotle1=vtotle1+var1(x,y);
end
end
end
G2=gtotle1/gtemp1;V2=vtotle1/vtemp1;
e=zeros(H,L);
for x=1:H
for y=1:L
if aveg1(x,y)>G2 && var1(x,y)<V2%如果M>M1且Var<Var1，则认为背景
e(x,y)=1;
end %如果M<=M1且Var>=Var1，则认为前景，否则待定
if aveg1(x,y)< G1-100 && var1(x,y)< V2
e(x,y)=1;
end
end
end
for x=2:H-1
for y=2:L-1
if e(x,y)==1
if e(x-1,y) + e(x-1,y+1) +e(x,y+1) + e(x+1,y+1) + e(x+1,y) + e(x+1,y-1) + e(x,y-1) + e(x-1,y-1) <=4
e(x,y)=0;
end
end
end
end
Icc = ones(m,n);
for x=1:H
for y=1:L
if e(x,y)==1
for i=1:M
for j=1:M
I(i+(x-1)*M,j+(y-1)*M)=G1;
Icc(i+(x-1)*M,j+(y-1)*M)=0;
end
end
end
end
end
y=I;
figure, imshow(uint8(I));title('分割');
end
指纹识别的matlab程序
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2014-04-30
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distance.m 299B p.m 453B find_point.m 476B point.m 708B guanghua.m 395B walk.m 999B last1.m 475B think1.m 1KB init.m 499B single_point.m 577B cut.m 712B juli.m 172B div.m 2KB thin.m 1KB
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