private List <System.Drawing.PointF> ExtractPoints(Emgu.CV.Image <Gray, byte> channel)
{
IncWeightedAverage[] iwas = new IncWeightedAverage[channel.Width];
// Search per row
byte[] d = channel.Bytes;
int stride = d.Length / channel.Height;
int h = channel.Height;
int w = channel.Width;
// See http://www.cse.iitm.ac.in/~cs670/book/node57.html
if (_search_direction == ESearchDirection.TopDown)
{
for (int r = 0; r < h; ++r)
{
ProcessRow(iwas, d, stride, w, r);
}
}
else
{
for (int r = h - 1; r >= 0; --r)
{
ProcessRow(iwas, d, stride, w, r);
}
}
List <System.Drawing.PointF> pixels = new List <System.Drawing.PointF>();
for (int i = 0; i < w; ++i)
{
if (iwas[i].iwa > 0)
{
pixels.Add(new System.Drawing.PointF(i, (float)iwas[i].iwa));
}
}
return(pixels);
}
private List<System.Drawing.PointF> ExtractPoints(Emgu.CV.Image<Gray, byte> channel) {
IncWeightedAverage[] iwas = new IncWeightedAverage[channel.Width];
// Search per row
byte[] d = channel.Bytes;
int stride = d.Length / channel.Height;
int h = channel.Height;
int w = channel.Width;
// See http://www.cse.iitm.ac.in/~cs670/book/node57.html
if (_search_direction == ESearchDirection.TopDown)
{
for (int r = 0; r < h; ++r)
{
ProcessRow(iwas, d, stride, w, r);
}
}
else
{
for (int r = h - 1; r >= 0; --r)
{
ProcessRow(iwas, d, stride, w, r);
}
}
List<System.Drawing.PointF> pixels = new List<System.Drawing.PointF>();
for (int i = 0; i < w; ++i) {
if (iwas[i].iwa > 0) {
pixels.Add(new System.Drawing.PointF(i, (float)iwas[i].iwa));
}
}
return pixels;
}
private void ProcessRow(IncWeightedAverage[] iwas, byte[] d, int stride, int w, int r)
{
int offset = stride * r;
for (int c = 0; c < w; ++c) {
byte i = d[offset + c];
if (i < _threshold) {
iwas[c].stop |= iwas[c].weights > 0;
} else {
if (!iwas[c].stop)
iwas[c].Update(r, i);
}
}
}
