Problem with my code, any help?

I am a begineer and I am trying to identify objects in a binary image, the same way as bwlabel does, but It didn ´t make exactly what I want

This is what I get: b =

     0     0     0     0     0     0     0     0     0     0
     0     1     0     0     0    10    10    10     0     0
     0     1     0     0     0    10    10    10     0     0
     0     1     0     0     0    10    10    10     0     0
     0     1     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0    14     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0

But, this i whhat I want:

b =

     0     0     0     0     0     0     0     0     0     0
     0     1     0     0     0     2     2     2     0     0
     0     1     0     0     0     2     2     2     0     0
     0     1     0     0     0     2     2     2     0     0
     0     1     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     3     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0
     0     0     0     0     0     0     0     0     0     0

    a=zeros(10);
    a(2:4,6:8)=1;
    a(7,8)=1;
    a(2:5,2)=1;
    [x,y]=size(a);
    [x1,x2]=find(a==1);
    [x11,x22]=size(x1);
    b=zeros(x,y);
    z=[x1 x2];
    T=0;
    conta=1;
    i=1;
    j=1;

while i<=x11

    for ii=z(i,1)-1:z(i,1)+1

        for jj=z(i,2)-1:z(i,2)+1

            if a(ii,jj)==1

                b(ii,jj)=conta;

            end

             if i>2 

                  if abs(z(i,1)-z(i-1,j))> 2 || abs(z(i,2)-z(i-1,2))> 3

                      conta=conta+1;

                  end

             end

        end

    end

           i=i+1;

end

Any help would be aprecciated!

Answer 1

[Sean de Wolski]

b = bwlabel(logical(a))

[Joseph]

Yes, but my aim is without using the function!

[Sean de Wolski]

oh, in that case:

b = labelmatrix(bwconncomp(a))

Why reinvent the wheel?

[Sean de Wolski]

Or if you're just trying to avoid a toolbox dependency:

[~,~,idx] = unique(yourb)
b = reshape(idx - 1,size(yourb))