c#影象處理-邊緣檢測
阿新 • • 發佈：2019-01-23
//邊緣檢測 public Bitmap cn(Bitmap x) { Color c1 = new Color(); Color c2 = new Color(); Color c3 = new Color(); Color c4 = new Color(); int i, j; int rr, gg, bb;// int r1, r2, r3, r4, fxr, fyr;// int g1, g2, g3, g4, fxg, fyg;// int b1, b2, b3, b4, fxb, fyb;// //把圖片中的圖片傳給一個ＢＩＴＭＡＰ型別 Bitmap box1 = new Bitmap(x); for (i = 0; i <= x.Width - 2; i++) { for (j = 0; j <= x.Height - 2; j++) { c1 = box1.GetPixel(i, j); c2 = box1.GetPixel(i + 1, j + 1); c3 = box1.GetPixel(i + 1, j); c4 = box1.GetPixel(i, j + 1); r1 = c1.R; r2 = c2.R; r3 = c3.R; r4 = c4.R; fxr = r1 - r2; fyr = r3 - r4; rr = Math.Abs(fxr) + Math.Abs(fyr) + 128; if (rr < 0) rr = 0; if (rr > 255) rr = 255; g1 = c1.G; g2 = c2.G; g3 = c3.G; g4 = c4.G; fxg = g1 - g2; fyg = g3 - g4; gg = Math.Abs(fxg) + Math.Abs(fyg) + 128; if (gg < 0) gg = 0; if (gg > 255) gg = 255; b1 = c1.B; b2 = c2.B; b3 = c3.B; b4 = c4.B; fxb = b1 - b2; fyb = b3 - b4; bb = Math.Abs(fxb) + Math.Abs(fyb) + 128; if (bb < 0) bb = 0; if (bb > 255) bb = 255; Color cc = Color.FromArgb(rr, gg, bb); box1.SetPixel(i, j, cc); } } return BitmapToBlack(box1, 0.8); }
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