Fake Ghost

there are five image to be given in ur code what are they?
for i = 1:5
    Im{i} = double(imread([int2str(i),'.jpg']));
    Imzero = Im{i}+Imzero;
end
and
extractball(Imwork,Imback,i);
what is this function can u provide some explainantion

Adjeinfo:

"by using existing eye template so that i don t need to crop every

time"
can u tell me how do u do that pleeeeeeeeezzzzzzzzzzzzzzzz