/// <summary>
/// Returns a List of Shapes found in the gray Image and returns Linesegments and color of shape
/// </summary>
/// <param name="inImg">Gray Image</param>
/// <param name="refImg">Color Image for shapecolor</param>
/// <param name="lines">outputarray for lines</param>
/// <param name="colors">outputarry for linecolors</param>
/// <returns></returns>
public List <ShapeColorObject> findShapesinGrayImg(Emgu.CV.Image <Gray, Byte> inImg, Emgu.CV.Image <Hsv, Byte> refImg, int index)
{
if (inImg == null || refImg == null)
{
return(null);
}
List <ShapeColorObject> funkshapes = new List <ShapeColorObject>();
for (Contour <Point> contours = inImg.FindContours(); contours != null; contours = contours.HNext)
{
Contour <Point> current = contours.ApproxPoly(contours.Perimeter * 0.008);
if (current.Area > 200)
{
Point[] points = current.ToArray();
int meanX = 0;
int meanY = 0;
foreach (Point p in points)
{
meanX += p.X;
meanY += p.Y;
}
meanX /= current.Total;
meanY /= current.Total;
ShapeColorObject newObj;
Hsv col;
if (current.Total == 3) //3 vertices
{
col = new Hsv(0, 255, 220);
newObj = new ShapeColorObject(current.Area, ShapeColorObject.shape.tri, refImg[meanY, meanX], meanX, meanY);
newObj.imIndex = index;
funkshapes.Add(newObj);
}
else if (current.Total == 4 && current.Convex) //4 vertices convex
{
col = new Hsv(45, 255, 220);
newObj = new ShapeColorObject(current.Area, ShapeColorObject.shape.rect, refImg[meanY, meanX], meanX, meanY);
newObj.imIndex = index;
funkshapes.Add(newObj);
}
else if (current.Total > 8 && current.Convex) //8+ vertices (circle) convex
{
col = new Hsv(90, 255, 220);
newObj = new ShapeColorObject(current.Area, ShapeColorObject.shape.circle, refImg[meanY, meanX], meanX, meanY);
newObj.imIndex = index;
funkshapes.Add(newObj);
}
else //other shapes
{
col = new Hsv(135, 255, 220);
newObj = new ShapeColorObject(current.Area, ShapeColorObject.shape.undef, refImg[meanY, meanX], meanX, meanY);
newObj.imIndex = index;
funkshapes.Add(newObj);
}
for (int i = 0; i < current.Total - 1; i++)
{
newObj.lineSegments.Add(new LineSegment2D(points[i], points[i + 1])); //add contour line segments to new ShapeColorObject
}
newObj.lineSegments.Add(new LineSegment2D(points[current.Total - 1], points[0]));
double cirumf = 0;
foreach (LineSegment2D s in newObj.lineSegments)
{
cirumf += s.Length;
}
newObj.circularity = (float)(cirumf * cirumf / current.Area);
} //ende if(200>area)
} //ende von for(contours....)
return(funkshapes);
}
public int apply(string fileName, string output)
{
int counter = 0;
Emgu.CV.Image<Bgr, Byte> imgS = new Emgu.CV.Image<Bgr, Byte>(fileName);
Emgu.CV.Image<Gray, Byte> img = new Emgu.CV.Image<Gray, Byte>(fileName);
//Emgu.CV.Image<Gray, Byte> imgGray = new Image<Gray, byte>(img.Width, img.Height);
//CvInvoke.cvCvtColor(img, imgGray, COLOR_CONVERSION.BGR2GRAY);
int thresh = 1;
int max_thresh = 255;
img = img.ThresholdBinary(new Gray(thresh), new Gray(max_thresh));
img.Save(output.Replace(".", "_binary."));
Contour<Point> contur = img.FindContours(Emgu.CV.CvEnum.CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE, Emgu.CV.CvEnum.RETR_TYPE.CV_RETR_CCOMP);
Emgu.CV.CvInvoke.cvDrawContours(imgS, contur, new MCvScalar(0, 0, 255), new MCvScalar(0, 0, 255), 1, 1, LINE_TYPE.EIGHT_CONNECTED, new Point(0, 0));
contur = img.FindContours(Emgu.CV.CvEnum.CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE, Emgu.CV.CvEnum.RETR_TYPE.CV_RETR_CCOMP);
while (contur != null && contur.HNext != null)
{
if (counter == 0) { counter++; }
contur = contur.HNext;
counter++;
}
MCvFont font = new MCvFont(Emgu.CV.CvEnum.FONT.CV_FONT_HERSHEY_SIMPLEX, 0.8f, 0.8f);
MCvScalar color = new MCvScalar(255, 255, 255);
CvInvoke.cvPutText(imgS, "counter:" + counter, new Point(10, 20), ref font, color);
imgS.Save(output);
return counter;
}