Code generation requires variable 'ac' to be fully defined before subscripting it. Code generation requires variable 'an' to be fully defined before subscripting it. Code generation requires variable 'A11' to be fully defined before subscripting it.

function [A] = segmentIm(I,seedp,th,L)
%UNTITLED6 Summary of this function goes here
%   Detailed explanation goes here


%.............................................Probability Map Computation
I1=rgb2hsv(I); %Converting image rgb to hsv
H=I1(:,:,1);
S=I1(:,:,2);
V=I1(:,:,3);
A=zeros(size(L));

a=8;
%............................color channel modification
Sm=log((a*S)+1)/log(a+1);
Vm=log((a*V)+1)/log(a+1);
Hm=H-1/12;
idx=find(Hm<0);
Hm(idx)=1+Hm(idx);
%Sm=S;
%I1m=cat(3, Hm,Sm,Vm);
%.....................................................
Vk=0;
Vw=1;
Sw=0;
Hr=11/12;
Sr=1;
Vr=1;
Hy=1/12;
Sy=1;
Vy=1;
%............................Distance Calculation
Dr=sqrt((Hm-Hr).^2+(Sm-Sr).^2+(Vm-Vr).^2);
Dy=sqrt((Hm-Hy).^2+(Sm-Sy).^2+(Vm-Vy).^2);
Dk=Vm-Vk;
Dw=sqrt((Vm-Vw).^2+(Sm-Sw).^2);
%...............................................


Pr=1./(1+(Dr./Dy).^2+(Dr./Dk).^2+(Dr./Dw).^2);
Py=1./((Dy./Dr).^2+1+(Dy./Dk).^2+(Dy./Dw).^2);
Pk=1./((Dk./Dr).^2+(Dk./Dy).^2+1+(Dk./Dw).^2);
Pw=1./((Dw./Dr).^2+(Dw./Dy).^2+(Dw./Dk).^2+1);

%..................................................
% % 
% figure, imshow(Pr,[])
% figure, imshow(Py,[])
% figure, imshow(Pk,[])
% figure, imshow(Pw,[])






% BW = boundarymask(L);
%  figure,imshow(imoverlay(I,BW,'cyan'),'InitialMagnification',67)
%  s = regionprops(L, 'Centroid');
%  %imshow(imoverlay(I,BW,'cyan'),'InitialMagnification',67)
% 
% for k1 = 1:numel(s)
%     c = s(k1).Centroid;
%     text(c(1), c(2), sprintf('%d', k1), ...
%         'HorizontalAlignment', 'center', ...
%         'VerticalAlignment', 'middle','Color','b');
% end
% hold off



%.............................................Superpixel Region Growing
In_sp=find(L==seedp);
nps=numel(In_sp);
A(In_sp)=1;

   bSup=(L==seedp);


    spr=Pr.*bSup;
    spy=Py.*bSup;
    spk=Pk.*bSup;
    spw=Pw.*bSup;
    
    
    
    ac(1,:)=sum(spr(:))/nps;
    ac(2,:)=sum(spy(:))/nps;
    ac(3,:)=sum(spk(:))/nps;
    ac(4,:)=sum(spw(:))/nps;
    av=ac;
    
    
    wSup=zeros(100,1);
    nwSup=zeros(100,1);
    aap=1;
    oc=0;
    tc=0;
    while (length(aap))~=0
        adjacent_pixels = imdilate(A, ones(3,3)) & ~A;
        App=adjacent_pixels.*L;
%         negL=unique(App);
%         negL1=nonzeros(negL);

        negL=nonzeros(App);
        negL1=unique(negL,'stable');
        
        negL1n= sortbypos(A,App,negL1);
        
%         negL1n=negL1;
        
        for ii=1:length(negL1n)
            
            
            ch_sup=negL1n(ii);
            
            a1=ismember(ch_sup,nwSup);
            a2=ismember(ch_sup,wSup);
            
            
            if a1==0 && a2==0
                Ab=zeros(size(I(:,:,1)));
                %an=zeros(4,1);
                idx1=find(L==ch_sup);
                Ab(idx1)=1;
                bSupc=Ab;
                cspr=Pr.*bSupc;
                cspy=Py.*bSupc;
                cspk=Pk.*bSupc;
                cspw=Pw.*bSupc;
                
                
                an(1,:)=sum(cspr(:))/numel(idx1);
                an(2,:)=sum(cspy(:))/numel(idx1);
                an(3,:)=sum(cspk(:))/numel(idx1);
                an(4,:)=sum(cspw(:))/numel(idx1);
                
                
                D=sqrt(sum((av - an) .^ 2));
                
               
                
                if D<=th
                    A(idx1)=1;
                   
                    oc=oc+1;
                    wSup(oc,:)=ch_sup;
                    
                    av(1,:)=(av(1,:)+an(1,:))/2;
                    av(2,:)=(av(2,:)+an(2,:))/2;
                    av(3,:)=(av(3,:)+an(3,:))/2;
                    av(4,:)=(av(4,:)+an(4,:))/2;
                    
                else
                    tc=tc+1;
                    nwSup(tc,:)=ch_sup;
                    A(idx1)=0;
                    A11(idx1)=1;
                end
                
                
                
            end
            
            
        end
        
  %............................................................               
        
        
       
        nwSup1=nonzeros(nwSup);
        Lia1 = ismember(negL1,nwSup1);
        aap=find(Lia1<1);
        
    end
end

Answer 1

[Walter Roberson]

Near the top of the code, you need to add

ac = zeros(4,1);
an = zeros(4,1);
A1 = zeros(size(L));

[Suvitha Palani]

i still got these errors for the similar code

[Walter Roberson]

The first two errors tell me that your input signal I is a 2D array rather than a 3D array (RGB)

A number of the following errors are consequences of that error in size of the input signal.

Answer 2

[Darshan Ramakant Bhat]

Like Walter suggested you need to fully difine variables size before accessing it.

You can use %#codegen pragma at the beginning of your function to get all such issues highlighted.

I could modify the function a bit and and get it working with codegen. Please do a diff with the modified code and your code to check what exactly is changed. You can tweek it a little bit to suite your application.

Please use the attached files.

Hope this will be helpful

[Darshan Ramakant Bhat]

Also below chart will be helpful if you are getting strated with MATLAB Coder

https://www.mathworks.com/help/coder/gs/workflow-overview.html