public Master(IBitmap reference)
{
Reference = reference;
var m = new int[reference.Width * reference.Height];
m.Fill(-1);
var l = new List <VectorInt2>();
var cc = 0;
foreach (var position in reference.TruePositions())
{
l.Add(position);
m[reference.ToLinearSpace(position)] = cc++;
}
MapOut = l.ToImmutableList();
MapIn = m.ToImmutableArray();
}