public void Prepare(IReadOnlyCollection <Cell> cells, Action <int, double> broadcast)
{
Debug.Assert(IsResolved == false, "IsResolved == false");
_neighbours = new Neighbours(this, cells);
_frames = _images
.Select(image => new Frame(image, _rect))
.ToArray();
var frameCount = 0;
double frameDivisor = _frames.Length;
foreach (var frame in _frames)
{
frame.UpdateConstancy(_frames);
broadcast(++frameCount, frameDivisor);
}
SelectFrame = _frames.OrderByDescending(frame => frame.Score).First();
}