/// <summary>
/// gets point where the edge positions start to move away from the edge line
/// </summary>
/// <param name="distanceProcessor"></param>
/// <returns></returns>
private int?GetDiscTopEndY(IDistanceProcessor distanceProcessor)
{
var maxDistanceVarianceOnLine = GetMaxDistanceVarianceOnLine(distanceProcessor);
var movingAwaySequentially = false;
var yMovingAwayStartPt = 0;
var startIndex = _image.Height - _inputParams.MinPixelsForBaseDisc - 1;
for (var y = startIndex; y >= 0; y--)
{
var distance = distanceProcessor.GetDistance(y);
if (distance > maxDistanceVarianceOnLine)
{
if (!movingAwaySequentially)
{
movingAwaySequentially = true;
yMovingAwayStartPt = y;
}
if (distance >= _inputParams.MinPixelsForBaseDiscEndOfEdge)
{
return(yMovingAwayStartPt + 1 < _image.Height? yMovingAwayStartPt + 1 : (int?)null);
}
}
else
{
movingAwaySequentially = false;
}
}
return(null);
}
private double GetMaxDistanceVarianceOnLine(IDistanceProcessor distanceProcessor)
{
var maxDistance = 0.0;
for (int y = _image.Height - 1, ctr = 1; y >= 0 && ctr <= _inputParams.MinPixelsForBaseDisc; y--, ctr++)
{
var distance = Math.Abs(distanceProcessor.GetDistance(y));
if (distance > maxDistance)
{
maxDistance = distance;
}
}
return(maxDistance);
}