bbiwarg-original/bbiwarg/Images/PalmImage.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using Emgu.CV;
using Emgu.CV.Structure;
using System.Drawing;

using bbiwarg.Detectors.Fingers;
using bbiwarg.Utility;

namespace bbiwarg.Images
{
    class PalmImage
    {
        private Image<Gray, Byte> image;
        private int width, height;
        bool[,] inContour;
        
        public PalmImage(EdgeImage edgeImage, FingerTracker fingerTracker)
        {
            image = edgeImage.getImage(); //.Clone();
            width = image.Width;
            height = image.Height;
            
            foreach (Finger f in fingerTracker.getFingers())
            {
                Vector<float> tip = new Vector<float>(new float[] { f.Tip.X, f.Tip.Y });
                Vector<float> hand = new Vector<float>(new float[] { f.Hand.X, f.Hand.Y });


                for (int x = 0; x < width; ++x)
                {
                    for (int y = 0; y < height; ++y)
                    {
                        if (image.Data[y, x, 0] != 0)
                        {
                           Vector<float> p = new Vector<float>(new float[] { x, y });

                            float l2 = (tip - hand) * (tip - hand);
                            float t = (p - tip) * (hand - tip) / l2;
                            if (t >= 0.0 && t <= 1.0)
                            {
                                Vector<float> tmp = hand - tip;
                                tmp.multiply(t);
                                Vector<float> projection = tip + tmp;

                                if (p.distance(projection) <= 15)
                                    image.Data[y, x, 0] = 0;
                            }
                        }
                    }
                }
            }

            findContour();
        }

        private void findContour()
        {
            //image = image.Dilate(1);
            Contour<Point> contour = image.FindContours(Emgu.CV.CvEnum.CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_NONE,
                                                        Emgu.CV.CvEnum.RETR_TYPE.CV_RETR_LIST);

            Contour<Point> maxContour = contour;
            double maxPerimeter = 0;
            while (contour != null)
            {
                if (contour.Perimeter > maxPerimeter)
                {
                    maxPerimeter = contour.Perimeter;
                    maxContour = contour;
                }
                contour = contour.HNext;
            }

            inContour = new bool[width, height];
            if (maxContour != null)
            {
                foreach (Point p in maxContour)
                    inContour[p.X, p.Y] = true;
            }
        }

        public bool belongsToPalm(int x, int y)
        {
            return inContour[x, y];
        }
    }
}