problem in seeded region growing algorithm

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aarti sawant 2014-1-1

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/111159-problem-in-seeded-region-growing-algorithm

评论： Hanz Ero 2020-3-29

I am trying to implement seed region growing algorithm but its not giving proper output.Please help me solve the error..

here is my code..

clc;clear all;close all;
r=imread('e:\IMAGES\pears.jpg'); % read the image
[rows columns numberOfColorChannels] = size(r);
if numberOfColorChannels > 1
  r = rgb2gray(r); % converting image to grayscale
else
  r = r; % It's already gray.
end
[row col]=size(r)
g=zeros(row,col);
I=zeros(size(r));
I=r;
S=zeros(size(r));
S(80:82,172:174)=ones(3,3); %initial seed image
figure,imshow(S),title('Initial Seed Image')
T=50; %threshold value
r=double(r);
w = [1 1 1;1 1 1;1 1 1 ];  
SI=size(r)
p=size(r);
for x=2:1:p(1)-1
  for y=2:1:p(2)-1  
      a1=[w(1)*S(x-1,y-1) w(2)*S(x-1,y) w(3)*S(x-1,y+1) w(4)*S(x,y-1) w(5)*S(x,y) w(6)*S(x,y+1) w(7)*S(x+1,y-1) w(8)*S(x+1,y) w(9)*S(x+1,y+1)];
      AI(x,y)=min(a1);
  end
end
SI= padarray(AI,[1 1],'symmetric','post')
SI=uint8(SI)
J=find(SI); 
S1=r(J);  % seed value obtained from SI
seedvalue=S1;
S=abs(r- seedvalue)<= T; % thresholding the absolute difference between original image & seed value
figure,imshow(S),title('thresholding output')
      for p=1:1:row
      for q=1:1:col
          if(SI(p,q)==1)
              for n=q:1:col
              if S(p,q)==S(p,n)
                  g(p,n)=1;
              end
              end
              for n=q:(-1):1
              if S(p,q)==S(p,n)
                  g(p,n)=1;
              end
              end
              for n=p:-1:1
              if S(p,q)==S(n,q)
                  g(n,q)=1;
              end
              end
              for n=p:1:row
              if S(p,q)==S(n,q)
                  g(n,q)=1;
              end
              end
             for n1=p:1:row
               for  n2=q:1:col
              if S(p,q)==S(n1,n2)
                  g(n1,n2)=1;
              end
              end
              end
              for n1=p:1:row
               for   n2=q:(-1):1
              if S(p,q)==S(n1,n2)
                  g(n1,n2)=1;
              end
              end
              end
              for n1=p:-1:1
               for   n2=q:(-1):1
              if S(p,q)==S(n1,n2)
                  g(n1,n2)=1;
              end
              end
              end
                for n1=p:-1:1
                for  n2=q:1:col
              if S(p,q)==S(n1,n2)
                  g(n1,n2)=1;
                  end
              end
              end
              end
              end
          end
g=uint8(g)
SE = ones(1,1);
g =bwlabel(imdilate(g,SE),8);%reconstructing the image
%g=logical(g)
%I(g)=0
%figure,imshow(I),title('Final Output')
Lrgb = label2rgb(g);
figure, imshow(Lrgb)
title('output of region growing process')
figure, imshow(I), hold on
himage = imshow(Lrgb);
set(himage, 'AlphaData', 0.3);
title('final output superimposed on original image')