private static IList<PointF> findContour(Gray<byte>[,] templateImg)
{
var contour = templateImg.FindContour(minGradientStrength: 150).Select(x => (PointF)x).ToList();
/*********** cut bottom border and shift contour beginning to the first non-border point ***************/
int firstIdx = -1;
int lastIdx = -1;
for (int i = 0; i < contour.Count; i++)
{
if (contour[i].Y == (templateImg.Height() - 1))
{
if (firstIdx == -1) firstIdx = i;
lastIdx = i;
}
}
//return contour;
return new CircularList<PointF>(contour).GetRange(lastIdx, contour.Count - (lastIdx - firstIdx + 1));
}