C#圖象處置之邊沿檢測(Smoothed)的辦法。本站提示廣大學習愛好者:(C#圖象處置之邊沿檢測(Smoothed)的辦法)文章只能為提供參考,不一定能成為您想要的結果。以下是C#圖象處置之邊沿檢測(Smoothed)的辦法正文
本文實例講述了C#圖象處置之邊沿檢測(Smoothed)的辦法。分享給年夜家供年夜家參考。詳細以下:
//界說smoothed算子邊沿檢測函數 private static Bitmap smoothed(Bitmap a) { int w = a.Width; int h = a.Height; try { Bitmap dstBitmap = new Bitmap(w, h, System.Drawing.Imaging.PixelFormat.Format24bppRgb); System.Drawing.Imaging.BitmapData srcData = a.LockBits(new Rectangle (0, 0, w, h), System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format24bppRgb); System.Drawing.Imaging.BitmapData dstData = dstBitmap.LockBits(new Rectangle (0, 0, w, h), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format24bppRgb); unsafe { byte* pIn = (byte*)srcData.Scan0.ToPointer(); byte* pOut = (byte*)dstData.Scan0.ToPointer(); byte* p; int stride = srcData.Stride; for (int y = 0; y < h; y++) { for (int x = 0; x < w; x++) { //邊沿八個點像素不變 if (x == 0 || x == w - 1 || y == 0 || y == h - 1) { pOut[0] = pIn[0]; pOut[1] = pIn[1]; pOut[2] = pIn[2]; } else { int r0, r1, r2, r3, r4, r5, r6, r7, r8; int g1, g2, g3, g4, g5, g6, g7, g8, g0; int b1, b2, b3, b4, b5, b6, b7, b8, b0; double vR, vG, vB; //左上 p = pIn - stride - 3; r1 = p[2]; g1 = p[1]; b1 = p[0]; //正上 p = pIn - stride; r2 = p[2]; g2 = p[1]; b2 = p[0]; //右上 p = pIn - stride + 3; r3 = p[2]; g3 = p[1]; b3 = p[0]; //左 p = pIn - 3; r4 = p[2]; g4 = p[1]; b4 = p[0]; //右 p = pIn + 3; r5 = p[2]; g5 = p[1]; b5 = p[0]; //左下 p = pIn + stride - 3; r6 = p[2]; g6 = p[1]; b6 = p[0]; //正下 p = pIn + stride; r7 = p[2]; g7 = p[1]; b7 = p[0]; // 右下 p = pIn + stride + 3; r8 = p[2]; g8 = p[1]; b8 = p[0]; //中間點 p = pIn; r0 = p[2]; g0 = p[1]; b0 = p[0]; //應用模板 vR = (double)(Math.Abs(r3+r5+r8-r1-r4-r6) + Math .Abs (r1+r2+r3-r6-r7-r8)); vG = (double)(Math.Abs(g3+g5+g8-g1-g4-g6) + Math .Abs (g1+g2+g3-g6-g7-g8)); vB = (double)(Math.Abs(b3+b5+b8-b1-b4-b6) + Math. Abs (b1+b2+b3-b6-b7-b8)); if (vR > 0) { vR = Math.Min(255, vR); } else { vR = Math.Max(0, vR); } if (vG > 0) { vG = Math.Min(255, vG); } else { vG = Math.Max(0, vG); } if (vB > 0) { vB = Math.Min(255, vB); } else { vB = Math.Max(0, vB); } pOut[0] = (byte)vB; pOut[1] = (byte)vG; pOut[2] = (byte)vR; } pIn += 3; pOut += 3; } pIn += srcData.Stride - w * 3; pOut += srcData.Stride - w * 3; } } a.UnlockBits(srcData); dstBitmap.UnlockBits(dstData); return dstBitmap; } catch { return null; } }
願望本文所述對年夜家的C#法式設計有所贊助。