What does this code compute?

what does this code compute? mask ( inside ) = ones ( size ( inside ) )

Answer 1

[Titus Edelhofer]

It set's all entries in mask, where inside is true, to one. I guess

mask(inside) = 1;

should do the same in fact.

Titus

[Anushka]

Thank you sir for your kind response

[Anushka]

d               = size(img);                    % dimension
img             = double(img);

%----------     Normalize co-ordinates to [-sqrt2,sqrt2] (centroid assumed @ origin)
xstep           = 2/(d(1)-1);
ystep           = 2/(d(2)-1);
[x,y]           = meshgrid(-1:xstep:1,-1:ystep:1);

Sir can you please explain this too.