evaluation of image segmentation

Question

hamaimi sarah 2011-8-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/13343-evaluation-of-image-segmentation

I have a problem on this program, you can help me? thank you :

     I = imread('cell.tif');
  figure, imshow(I), title('original image');
  text(size(I,2),size(I,1)+15, ...
      'Image courtesy of Alan Partin', ...
      'FontSize',7,'HorizontalAlignment','right');
  text(size(I,2),size(I,1)+25, ....
      'Johns Hopkins University', ...
      'FontSize',7,'HorizontalAlignment','right');
  [junk threshold] = edge(I, 'sobel');
  fudgeFactor = .5;
  BWs = edge(I,'sobel', threshold * fudgeFactor);
  figure, imshow(BWs), title('binary gradient mask');
   se90 = strel('line', 3, 90);
  se0 = strel('line', 3, 0);
   BWsdil = imdilate(BWs, [se90 se0]);
  figure, imshow(BWsdil), title('dilated gradient mask');
   BWdfill = imfill(BWsdil, 'holes');
  figure, imshow(BWdfill);
  title('binary image with filled holes');
   BWnobord = imclearborder(BWdfill, 4);
  figure, imshow(BWnobord), title('cleared border image');
   seD = strel('diamond',1);
  BWfinal = imerode(BWnobord,seD);
  BWfinal = imerode(BWfinal,seD);
  figure, imshow(BWfinal), title('segmented image');
  Imdep = title('original image');
  Imseg = title('segmented image');
  function valeur= Inter_LN(Imdep,Imseg)
  % Calcul du contraste inter-région de Lévine et Nazif
  % pour une image bmp 8bits en niveaux de gris stockée sous la forme d'une matrice
  % Imseg : matrice correspondant à l'image segmentée avec des valeurs allant de 1 à n pour les n régions segmentées 
  % Imdep : matrice correspondant à l'image originale
  %
  %
  % Utilitaires pour l'évaluation de la segmentation d'images
  % Toolbox matlab (version 5.3)
  %
  % (c) Laboratoire de Vision et Robotique (UPRES EA 2078)
  % ENSI de Bourges - Université d'Orléans
  %
  % Sébastien Chabrier : sebastien.chabrier@ensi-bourges.fr
  %
  % Si vous utilisez cette toolbox, veuillez citer ce papier svp.
  %
  %S. Chabrier, B. Emile, C. Rosenberger, H. Laurent, 
  %"Unsupervised performance evaluation of image segmentation", 
  %Special Issue on Performance Evaluation in Image Processing, 
  %EURASIP Journal on Applied Signal Processing, pages 1-12, 2006.
valeur=0;
NBCLASS=double(max(max(Imseg)));
moyenne=zeros(1,NBCLASS);
contraste=zeros(1,NBCLASS);
contraste_croise=zeros(NBCLASS);
perimetre=zeros(1,NBCLASS);
frontiere=zeros(NBCLASS);
aire=zeros(1,NBCLASS);
for k=1:NBCLASS
   [region_k]=find(Imseg==k);
   aire(k)=length(region_k);         %nb de pixels de la région k
   if (aire(k)>0)
      moyenne(k)=sum(sum(Imdep(region_k)))/aire(k);
   else
      moyenne(k)=0;
   end;
     Imbin=zeros(size(Imseg));
     Imbin(region_k)=ones(size(region_k));
    contour_k=find((double(dilate(Imbin,ones(3)))-double(Imbin))==1);
     for l=1:NBCLASS
        if (contour_k)
          M=find(Imseg(contour_k)==l);
          if (M)
             frontiere(k,l)=length(M);
          else
             frontiere(k,l)=0;
           end;
        else
           frontiere(k,l)=0;
        end;
    end;
     perimetre(k)=length(contour_k);
     if (perimetre(k)==0)
        frontiere(k,:)=0;
     else
        frontiere(k,:)=frontiere(k,:)/perimetre(k);
     end;
end;
for k=1:NBCLASS
   for l=1:NBCLASS
    if (moyenne(k)+moyenne(l)==0)
         contraste_croise(k,l)=0;
      else
         contraste_croise(k,l)=abs(moyenne(k)-moyenne(l))/(moyenne(k)+moyenne(l));
      end;
   end;
  contraste(k)=frontiere(k,:)*contraste_croise(k,:)';
end;
%[contraste_croise]
%pause;
valeur=(aire*contraste')/sum(aire);   
disp(valeur)

1 个评论
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Image Analyst 2011-8-9

What's the problem? I copied, I pasted, and it ran. No problem that I could see, other than you don't know how to use subplot and so you have 6 separate figures.

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Answer 1

Walter Roberson 2011-8-8

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/13343-evaluation-of-image-segmentation#answer_18236

Perhaps diode J17 on your mouse is suffering an P/NP junction breakdown because the power source went over-amperage because of a transient when you put new batteries in 206 days ago.

Do you have the proper equipment at home to do xenon penta-fluoride sputter welding on 34 nm scale?