private void ApplyShapeMatching(Image <Bgr, byte> imgTemplate, double threshold = 0.00001,
double area = 1000, ContoursMatchType matchType = ContoursMatchType.I2)
{
try
{
var img = IMGDict["input"].Clone();
var imgSource = img.Convert <Gray, byte>()
.SmoothGaussian(3)
.ThresholdBinaryInv(new Gray(240), new Gray(255));
var imgTarget = imgTemplate.Convert <Gray, byte>()
.SmoothGaussian(3)
.ThresholdBinaryInv(new Gray(240), new Gray(255));
var imgSourceContours = CalculateContours(imgSource, area);
var imgTargetContours = CalculateContours(imgTarget, area);
if (imgSourceContours.Size == 0 || imgTargetContours.Size == 0)
{
throw new Exception("Not engough contours.");
}
for (int i = 0; i < imgSourceContours.Size; i++)
{
var distance = CvInvoke.MatchShapes(imgSourceContours[i], imgTargetContours[0]
, matchType);
if (distance <= threshold)
{
var rect = CvInvoke.BoundingRectangle(imgSourceContours[i]);
img.Draw(rect, new Bgr(0, 255, 0), 4);
CvInvoke.PutText(img, distance.ToString("F6"), new Point(rect.X, rect.Y + 20),
Emgu.CV.CvEnum.FontFace.HersheyPlain, 3, new MCvScalar(255, 0, 0));
}
}
pictureBox1.Image = img.ToBitmap();
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
private void button1_Click(object sender, EventArgs e)
{
try
{
if (pictureBox1.Image == null)
{
throw new Exception("Select a template image.");
}
var img = new Bitmap(pictureBox1.Image).ToImage <Bgr, byte>();
ContoursMatchType matchType = ContoursMatchType.I2;
switch (comboBox1.SelectedIndex)
{
case 0:
matchType = ContoursMatchType.I1;
break;
case 1:
matchType = ContoursMatchType.I2;
break;
case 2:
matchType = ContoursMatchType.I3;
break;
}
double areaThreshold = 1000;
double.TryParse(tbMinArea.Text, out areaThreshold);
double threshold = 0.001;
double.TryParse(tbDistanceThreshold.Text, out threshold);
if (OnShapeMatching != null)
{
OnShapeMatching(img, threshold, areaThreshold, matchType);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
