Doubt in Region_Growing

Question

Deepak 2012-1-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/27131-doubt-in-region_growing

Coding r:

for i=1:M 
 for j=1:N 
   if Y(i,j)==1 
    if (i-1)>0 & (i+1)<(M+1) & (j-1)>0 & (j+1)<(N+1) 
     for u= -1:1                               
      for v= -1:1                              
        if  Y(i+u,j+v)==0 & abs(I(i+u,j+v)-seed)=threshold&1/(1+1/15*abs(I(i+u,j+v)-seed))>0.8 %%Error in this line.
           Y(i+u,j+v)=1;                       
           count=count+1;                                  
           s=s+I(i+u,j+v);                      
        end 
      end   
     end 
    end 
   end 
 end 
end 
suit=suit+count;                                   
sum=sum+s;                                     
seed=sum/suit;                                    
end

I intimate the line of error in coding I can't able to rectify the problem.I am try to work region_growing with MRI Image.Please rectify and reply me back.

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Answer 1

Bård Skaflestad 2012-1-26

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/27131-doubt-in-region_growing#answer_35332

在 MATLAB Online 中打开

This is very hard to read. Please consider marking up (and indenting) your code more properly the next time. I suggest using the "{} Code" button. Then it would look (something) like this

for i=1:M
   for j=1:N
      if Y(i,j)==1
         if (i-1)>0 & (i+1)<(M+1) & (j-1)>0 & (j+1)<(N+1)
            for u= -1:1
               for v= -1:1
                  if Y(i+u,j+v)==0 & abs(I(i+u,j+v)-seed)=threshold&1/(1+1/15*abs(I(i+u,j+v)-seed))>0.8 %%Error in this line.
                     Y(i+u,j+v)=1;
                     count=count+1;
                     s=s+I(i+u,j+v);
                  end
               end
            end
         end
      end
   end
end
suit=suit+count; sum=sum+s; seed=sum/suit;
end

The immediate problem is that you're using assignment (i.e., =) in the abs test versus threshold in the line you highlighted. You (probably) intended to use equality (i.e., ==) in stead.

There also appears to be a spurious end following the suit, sum and seed assignments. At least the final end does not match any of the |for|s or |if|s. Is it perhaps part of a larger loop or function body?