Please help! Trying to convert greyscale image back to rgb. error "rbg" not defined when using conversion code.

Sun=imread('noisePhoto.jpg');

Sun2=rgb2gray(Sun);

subplot(1,3,1)

title('Original')

imshow(Sun)

[m,n]= size(Sun2);

output=zeros(m,n);

for i=1:m

for j=1:n

rmin=max(1,i-1);

rmax=min(m,i+1);

cmin=max(1,j-1);

cmax=min(n,j+1);

%neigborhood

temp=Sun(rmin:rmax,cmin:cmax);

output(i,j)=mean(temp(:));

end

end

output=uint8(output);

subplot(1,3,2),imshow(output)

rgb=cat(3,output,output,output);

subplot(1,3,3);

imshow(rbg);

Answer 1

[Naman Bhaia]

I think it is saying 'rbg' not found becuase it seems to be a typographical error. Try 'imshow(rgb)' and see if it solves the issue you are facing. I tried running your code and after fixing the last line, it did not throw any other error.