本文实例讲述了C#图像伪彩色处理方法。分享给大家供大家参考。具体如下：
//灰度图转伪彩色图像函数 public Bitmap PGrayToColor(Bitmap src) { try { Bitmap a = new Bitmap(src); Rectangle rect = new Rectangle(0, 0, a.Width, a.Height); System.Drawing.Imaging.BitmapData bmpData = a.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb); int stride = bmpData.Stride; unsafe { byte* pIn = (byte*)bmpData.Scan0.ToPointer(); byte* P; int R, G, B; int temp = 0; for (int y = 0; y < a.Height; y++) { for (int x = 0; x < a.Width; x++) { P = pIn; B = P[0]; G = P[1]; R = P[2]; temp = (byte)(B * 0.114 + G * 0.587 + R * 0.299); if (temp >= 0 && temp <= 63) { P[2] = 0; P[1] = (byte)(254 - 4 * temp); P[0] = (byte)255; } if (temp >= 64 && temp <= 127) { P[2] = 0; P[1] = (byte)(4 * temp - 254); P[0] = (byte)(510 - 4 * temp); } if (temp >= 128 && temp <= 191) { P[2] = (byte)(4 * temp - 510); P[1] = (byte)(255); P[0] = (byte)0; } if (temp >= 192 && temp <= 255) { P[2] = (byte)255; P[1] = (byte)(1022 - 4 * temp); P[0] = (byte)0; } pIn += 3; } pIn += stride - a.Width * 3; } } a.UnlockBits(bmpData); return a; } catch (Exception e) { MessageBox.Show(e.Message.ToString()); return null; } }
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希望本文所述对大家的C#程序设计有所帮助。
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