Ejemplo n.º 1
0
        public DataMatrixExtraction(Bitmap sourceImage, FinderPatternPair fpp)
        {
            this.fpp = fpp;

            PointF p1   = fpp.p1.X < fpp.p2.X ? fpp.p1.ToF() : fpp.p2.ToF();
            PointF p2   = fpp.p1.X < fpp.p2.X ? fpp.p2.ToF() : fpp.p1.ToF();
            PointF vect = PointOps.Mult(PointOps.Sub(p2, p1), 0.1f);
            float  unit = (float)PointOps.Distance(vect);

            PointF normX = PointOps.Normalize(vect);

            angX = Math.Atan2(normX.Y, normX.X);
            double angY  = angX - Math.PI / 2;
            PointF normY = new PointF((float)Math.Cos(angY), (float)Math.Sin(angY));

            topLeft     = PointOps.Add(p1, PointOps.Add(PointOps.Mult(normX, unit), PointOps.Mult(normY, unit)));
            bottomLeft  = PointOps.Add(p1, PointOps.Sub(PointOps.Mult(normX, unit), PointOps.Mult(normY, unit)));
            topRight    = PointOps.Add(p1, PointOps.Add(PointOps.Mult(normX, unit * 9), PointOps.Mult(normY, unit)));
            bottomRight = PointOps.Add(p1, PointOps.Sub(PointOps.Mult(normX, unit * 9), PointOps.Mult(normY, unit)));

            rotatedMatrix = new Bitmap((int)Math.Ceiling(unit * 8), (int)Math.Ceiling(unit * 2), PixelFormat.Format32bppArgb);
            Graphics rotG = Graphics.FromImage(rotatedMatrix);

            rotG.RotateTransform((float)(-angX * 180 / Math.PI));

            float diagonal = (float)PointOps.Distance(p1, p2);

            rotG.DrawImage(
                sourceImage,
                new RectangleF(-diagonal, -diagonal, diagonal * 2, diagonal * 2),
                new RectangleF(topLeft.X - diagonal, topLeft.Y - diagonal, diagonal * 2, diagonal * 2),
                GraphicsUnit.Pixel);
            rotG.Dispose();

            int[] cellSum = new int[DataMatrixDrawer.rowCount * DataMatrixDrawer.columnCount];
            unsafe {
                BitmapData bd  = rotatedMatrix.LockBits(ImageLockMode.ReadOnly);
                byte *     ptr = (byte *)bd.Scan0.ToPointer();

                for (int y = 0; y < rotatedMatrix.Height; y++)
                {
                    for (int x = 0; x < rotatedMatrix.Width; x++)
                    {
                        int cx = (int)Math.Floor((float)x * DataMatrixDrawer.columnCount / rotatedMatrix.Width);
                        int cy = (int)Math.Floor((float)y * DataMatrixDrawer.rowCount / rotatedMatrix.Height);
                        cellSum[cy * DataMatrixDrawer.columnCount + cx] += *ptr;
                        ptr += 4;
                    }
                }

                rotatedMatrix.UnlockBits(bd);
            }
            double threshold = ValueClustering.DivThreshold(cellSum);

            extractedData = new bool[DataMatrixDrawer.rowCount * DataMatrixDrawer.columnCount];
            for (int q = 0; q < DataMatrixDrawer.rowCount * DataMatrixDrawer.columnCount; q++)
            {
                extractedData[q] = cellSum[q] < threshold;
            }
        }
Ejemplo n.º 2
0
        /*
         * Locates top-left cell corner at `x` column and `y` row.
         */
        public PointF GetTopLeftCellCorner(int x, int y)
        {
            PointF p = origin;

            for (int q = 0; q < x; q++)
            {
                p = PointOps.Add(p, PointOps.Mult(horizontalNormal, columnWidths[q]));
            }
            for (int q = 0; q < y; q++)
            {
                p = PointOps.Add(p, PointOps.Mult(verticalNormal, rowHeights[q]));
            }
            return(p);
        }
Ejemplo n.º 3
0
        /*
         * Draw a table on provided graphics canvas with provided pen.
         */
        public void DrawTable(Graphics g, Pen p)
        {
            PointF row = PointOps.Mult(horizontalNormal, totalWidth);
            PointF r   = origin;

            g.DrawLine(p, r, PointOps.Add(r, row));
            for (int q = 0; q < rowHeights.Count; q++)
            {
                r = PointOps.Add(r, PointOps.Mult(verticalNormal, rowHeights[q]));
                g.DrawLine(p, r, PointOps.Add(r, row));
            }

            PointF col = PointOps.Mult(verticalNormal, totalHeight);
            PointF c   = origin;

            g.DrawLine(p, c, PointOps.Add(c, col));
            for (int q = 0; q < columnWidths.Count; q++)
            {
                c = PointOps.Add(c, PointOps.Mult(horizontalNormal, columnWidths[q]));
                g.DrawLine(p, c, PointOps.Add(c, col));
            }
        }