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.

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Suvitha Palani on 23 Jan 2021
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,[])
% 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;
% 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

Walter Roberson on 23 Jan 2021
Near the top of the code, you need to add
ac = zeros(4,1);
an = zeros(4,1);
A1 = zeros(size(L));
Walter Roberson on 23 Jan 2021
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.

Darshan Ramakant Bhat on 23 Jan 2021
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.
Darshan Ramakant Bhat on 23 Jan 2021
Also below chart will be helpful if you are getting strated with MATLAB Coder

R2020a

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