private Point[] GetLocation(ValueTuple <List <double>, List <double> > mx)
{
var points = new List <Point>();
var matrix = mx.Item2;
foreach (var(cornerX, cornerY) in GetSampleCorners())
{
var(pointX, pointY) = Ransac.Transform(matrix, cornerX, cornerY);
points.Add(new Point((int)Math.Round(pointX), (int)Math.Round(pointY)));
}
return(points.ToArray());
}
public static Bitmap Transform(Bitmap pictureA, Bitmap pictureB, List <double> matrixA, List <double> matrixB)
{
int minX = 0,
maxX = pictureA.Width,
minY = 0,
maxY = pictureA.Height;
var points = new List <(double, double)>
{
Ransac.Transform(matrixB, 0, 0),
Ransac.Transform(matrixB, pictureB.Width, 0),
Ransac.Transform(matrixB, 0, pictureB.Height),
Ransac.Transform(matrixB, pictureB.Width, pictureB.Height)
};
minX = (int)Math.Min(minX, points.Min(x => x.Item1));
minY = (int)Math.Min(minY, points.Min(x => x.Item2));
maxX = (int)Math.Max(maxX, points.Max(x => x.Item1));
maxY = (int)Math.Max(maxY, points.Max(x => x.Item2));
int width = maxX - minX,
height = maxY - minY;
int dx = -minX, dy = -minY;
var bitmap = new Bitmap(width, height);
var g = Graphics.FromImage(bitmap);
g.DrawImage(pictureA, dx, dy, pictureA.Width, pictureA.Height);
for (var x = 0; x < bitmap.Width; x++)
{
for (var y = 0; y < bitmap.Height; y++)
{
var(nx, ny) = Ransac.Transform(matrixA, x - dx, y - dy);
if (nx < 0 || ny < 0 || nx >= pictureB.Width || ny >= pictureB.Height)
{
continue;
}
bitmap.SetPixel(x, y, pictureB.GetPixel((int)nx, (int)ny));
}
}
return(bitmap);
}
}
public List <Point[]> Find()
{
CoordinateStep = Math.Min(image.Width, image.Height) / 5;
var cellsX = (int)Math.Ceiling(image.Width * 1D / CoordinateStep);
var cellsY = (int)Math.Ceiling(image.Height * 1D / CoordinateStep);
VotesImage = IOHelper.MatToImage(image);
for (var i = 1; i < cellsX; i++)
{
var x = CoordinateStep * i;
DrawHelper.DrawLine(VotesImage, x, 0, x, image.Height - 1);
}
for (var i = 1; i < cellsY; i++)
{
var y = CoordinateStep * i;
DrawHelper.DrawLine(VotesImage, 0, y, image.Width - 1, y);
}
var descriptors1 = BlobsFinder.FindBlobs(sample, 500);
var descriptors2 = BlobsFinder.FindBlobs(image, 500);
var matches = DescriptorMatcher.Nndr(descriptors2, descriptors1);
ReverseMatches = matches.Select(x => new Match(x.Item2, x.Item1)).ToList();
var sampleCenterX = sample.Width / 2.0;
var sampleCenterY = sample.Height / 2.0;
votes = new double[cellsX, cellsY, AngleCells, CellsScale];
voters = new List <Match> [cellsX, cellsY, AngleCells, CellsScale];
foreach (var match in matches)
{
var samplePoint = match.Item2.Point;
var imagePoint = match.Item1.Point;
var scale = imagePoint.Radius / samplePoint.Radius;
var angle = match.Item2.Angle - match.Item1.Angle;
var vectorX = scale * (sampleCenterX - samplePoint.getX());
var vectorY = scale * (sampleCenterY - samplePoint.getY());
var centerX = imagePoint.getX() + vectorX * Math.Cos(angle) - vectorY * Math.Sin(angle);
var centerY = imagePoint.getY() + vectorX * Math.Sin(angle) + vectorY * Math.Cos(angle);
Vote(match, centerX, centerY, scale, angle);
DrawHelper.DrawLine(VotesImage,
imagePoint.getX(), imagePoint.getY(),
(int)Math.Round(centerX), (int)Math.Round(centerY));
}
for (var x = 0; x < cellsX; x++)
{
for (var y = 0; y < cellsY; y++)
{
for (var a = 0; a < AngleCells; a++)
{
for (var s = 0; s < CellsScale; s++)
{
if (IsVotesLocalMaximum(x, y, a, s) && voters[x, y, a, s].Count > VotersThreshold)
{
// DrawHelper.DrawPolygon(VotesImage, GetPreliminary(x, y, a, s), true);
objects.Add(GetLocation(Ransac.CalculateTransform(voters[x, y, a, s])));
}
}
}
}
}
return(objects);
}