private static ITemplate create(IEnumerable <PointF> normalizedPoints,
int scale,
int rotation,
string label = "")
{
var pointTransform = Transforms2D.Combine
(
Transforms2D.Scale(scale, scale),
Transforms2D.Rotation((float)Angle.ToRadians(rotation))
);
var transformedPts = normalizedPoints.Transform(pointTransform).ToList();
var boundingRect = transformedPts.BoundingRect();
var offset = boundingRect.Location;
transformedPts = transformedPts.Transform(Transforms2D.Translation(-offset.X, -offset.Y)).ToList();
var template = new OpenHandTemplate();
var features = new List <Feature>();
//var validIdxRange = CardinalSpline.ValidIndicesRange(transformedPts.Count);
//for (int i = validIdxRange.Min; i <= validIdxRange.Max; i++)
for (int i = CardinalSpline.MIN_INDEX; i < (transformedPts.Count - 1 - CardinalSpline.MAX_INDEX_OFFSET); i++)
{
var intPt = transformedPts[i].Round();
var direction = CardinalSpline.NormalAt(transformedPts, CONTOUR_TENSION, i);
var orientDeg = (int)Angle.ToDegrees(Math.Atan2(direction.Y, direction.X));
orientDeg = (int)Angle.NormalizeDegrees(orientDeg + 180);
var feature = createFeature(intPt.X, intPt.Y, orientDeg);
features.Add(feature);
}
template.Features = features.ToArray();
template.Size = Size.Round(boundingRect.Size);
template.ClassLabel = label;
return(template);
}
private void timer_Tick(object sender, EventArgs e)
{
const int BORDER_OFFSET = 20;
scale += 10 * dScale; if (scale > 300)
{
dScale = -1;
}
if (scale < 100)
{
dScale = 1;
}
angle += 5 * dAngle; if (angle > 360)
{
dAngle = -1;
}
if (dAngle < 0)
{
dAngle = 1;
}
var transformation = Transforms2D.Combine
(
Transforms2D.Rotation((float)Angle.ToRadians(angle)),
Transforms2D.Scale(scale, scale)
);
IEnumerable <PointF> pts = modelPts.Transform(transformation);
var box = pts.BoundingRect(); //maybe apply it to bounding box instead of points (expensive)
pts = pts.Transform(Transforms2D.Translation(-box.X + BORDER_OFFSET, -box.Y + BORDER_OFFSET));
var image = new Image <Bgr, byte>(scale + BORDER_OFFSET * 2, scale + BORDER_OFFSET * 2);
drawContour(pts.ToList(), image);
pictureBox.Image = image.ToBitmap();
}