private void ExtractFeaturesButton_Click(object sender, EventArgs e)
{
if (!strokes.Any())
{
return;
}
ComputeCenterOfGravity();
significantPointsAfterRayIntersection = RayIntersection.GetSignificanPointsAfterRayIntersection(strokes, centerOfGravityPoint);
foreach (var point in significantPointsAfterRayIntersection)
{
graphics.DrawLine(rayPen, centerOfGravityPoint, point);
DrawPoint(point, 9);
}
DrawSegmentsAfterRaysIntersection();
currentShapeFeatures = FeatureExtraction.GetShapeFeatures(significantPointsAfterRayIntersection);
acuteAnglesLabel.Text += currentShapeFeatures.AcuteAngles;
rightAnglesLabel.Text += currentShapeFeatures.RightAngles;
wideAnglesLabel.Text += currentShapeFeatures.WideAngles;
straightAnglesLabel.Text += currentShapeFeatures.StraightAngles;
recognizedShapeTypeLabel.Text = GetRecognizedClass();
}
public Sample GetTrainingSampleFromShapeFeatures(ShapeFeatures shapeFeatures, ShapeType shapeType)
{
return(new Sample
{
InputVector = GetInputVectorFromShapeFeatures(shapeFeatures),
OutputClass = shapeType.ToString()
});
}
public List <int> GetInputVectorFromShapeFeatures(ShapeFeatures shapeFeatures)
{
var acuteSerialCode = SerialCoding.GetSeriallyCodedValue(shapeFeatures.AcuteAngles, serialCodeLength);
var rightSerialCode = SerialCoding.GetSeriallyCodedValue(shapeFeatures.RightAngles, serialCodeLength);
var wideSerialCode = SerialCoding.GetSeriallyCodedValue(shapeFeatures.WideAngles, serialCodeLength);
var straightSerialCode = SerialCoding.GetSeriallyCodedValue(shapeFeatures.StraightAngles, serialCodeLength);
return(acuteSerialCode.Concat(rightSerialCode).Concat(wideSerialCode).Concat(straightSerialCode).ToList());
}
public ShapeFeatures GetShapeFeatures(List <Point> significantPoints)
{
var segments = GetSegments(significantPoints);
var shapeFeatures = new ShapeFeatures();
for (int i = 1; i < segments.Count; i++)
{
var segment1 = segments[i - 1];
var segment2 = segments[i];
var angleInRadians = GetAngleBetweenSegments(segment1.Item2, segment1.Item1, segment2.Item1, segment2.Item2);
var angle = Math.Abs(angleInRadians * 180 / Math.PI);
if (angle > 180)
{
angle = 360 - angle;
}
if (angle < 75)
{
shapeFeatures.AcuteAngles++;
}
else if (angle < 105)
{
shapeFeatures.RightAngles++;
}
else if (angle < 165)
{
shapeFeatures.WideAngles++;
}
else
{
shapeFeatures.StraightAngles++;
}
}
return(shapeFeatures);
}
