Example #1
0
        static int getObj(Bitmap im, int x, int y, bool[,] markMat, int depth, Color c,
            BoundingBox bBox, ColorStat cSum, ColorStat cSum2, ObjPoint coordSum)
        {
            if (depth > 3000) return 1;
            if (y < 0 || y >= im.Height || x < 0 || x >= im.Width)
                return 0;
            if (markMat[x, y])
                return 0;
            Color thisP = im.GetPixel(x, y);
            if (thisP.R != c.R || thisP.G != c.G || thisP.B != c.B)
                return 0;

            // new object
            ++depth;
            markMat[x, y] = true;
            int size = 1;

            // set bounding box
            if (x < bBox.topLeft.x) bBox.topLeft.x = x;
            if (x > bBox.bottomRight.x) bBox.bottomRight.x = x;
            if (y < bBox.topLeft.y) bBox.topLeft.y = y;
            if (y > bBox.bottomRight.y) bBox.bottomRight.y = y;

            // set sums
            cSum.R += thisP.R;
            cSum.G += thisP.G;
            cSum.B += thisP.B;

            cSum2.R += thisP.R * thisP.R;
            cSum2.G += thisP.G * thisP.G;
            cSum2.B += thisP.B * thisP.B;

            coordSum.x += x;
            coordSum.y += y;

            for (int i = x - 1; i <= x + 1; ++i)
            {
                for (int j = y - 1; j <= y + 1; ++j)
                {
                    size += getObj(im, i, j, markMat, depth, c, bBox, cSum, cSum2, coordSum);
                }
            }

            return size;
        }
Example #2
0
        static void detectObj(Bitmap im, List<AnalyzedObject> objects)
        {
            bool[,] markMat = new bool[im.Width, im.Height];

            for (int i = 0; i < im.Width; ++i)
            {
                for (int j = 0; j < im.Height; ++j)
                {
                    Color c = im.GetPixel(i, j);
                    if (c.B == 0 && c.R == 0 && c.G == 0)
                    {
                        continue;
                    }

                    // we are on a non white pixel
                    BoundingBox bBox = new BoundingBox();
                    bBox.topLeft.x = 10000;
                    bBox.topLeft.y = 10000;
                    bBox.bottomRight.x = 0;
                    bBox.bottomRight.y = 0;

                    ColorStat cSum = new ColorStat();
                    ColorStat cSum2 = new ColorStat();

                    ObjPoint coordSum = new ObjPoint();
                    int depth = 0;

                    int size = getObj(im, i, j, markMat, depth, c, bBox, cSum, cSum2, coordSum);
                    if (size == 0) continue;

                    AnalyzedObject obj = new AnalyzedObject();
                    obj.decision = true;

                    obj.leftTop.x = i;
                    obj.leftTop.y = j;
                    obj.size = size;
                    obj.color = c;
                    obj.bBox = bBox;

                    cSum.R /= size;
                    cSum.G /= size;
                    cSum.B /= size;

                    cSum2.R = Math.Sqrt(cSum2.R / size - cSum.R * cSum.R);
                    cSum2.G = Math.Sqrt(cSum2.G / size - cSum.G * cSum.G);
                    cSum2.B = Math.Sqrt(cSum2.B / size - cSum.B * cSum.B);

                    obj.colorAv = cSum;
                    obj.colorStdev = cSum2;

                    coordSum.x = (int)(coordSum.x / size);
                    coordSum.y = (int)(coordSum.y / size);
                    obj.centroid = coordSum;

                    objects.Add(obj);

                }
            }
        }