private void UpdateFrameProcessors()
{
var requiredTypes = new List <Type>();
var fb = Behaviours.Count();
var requestedTypes = Behaviours.Where(b => b.RequestedFrameProcessors != null).SelectMany(b => b.RequestedFrameProcessors);
if (requestedTypes != null)
{
requiredTypes.AddRange(requestedTypes.Distinct());
}
var presentTypes = FrameProcessors.Select(p => p.GetType()).Distinct();
var toRemove = presentTypes.Where(t => !requiredTypes.Contains(t)).ToList();
var toAdd = requiredTypes.Where(t => !presentTypes.Contains(t));
FrameProcessors.Where(p => toRemove.Contains(p.GetType())).ToList().ForEach(p => p.Dispose());
FrameProcessors.RemoveAll(p => toRemove.Contains(p.GetType()));
FrameProcessors.AddRange(toAdd.Select(t => (ICameraFrameProcessor)Activator.CreateInstance(t)));
}