[函数代码]

<strong>        /// <summary>/// Mid-point filter./// </summary>/// <param name="src">The source image.</param>/// <returns></returns>public static WriteableBitmap MidPointFilterProcess(WriteableBitmap src)中点滤波器{if (src != null){int w = src.PixelWidth;int h = src.PixelHeight;WriteableBitmap filterImage = new WriteableBitmap(w, h);byte[] temp = src.PixelBuffer.ToArray();byte[] tempMask = (byte[])temp.Clone();double[] Gray = new double[9];double gray = 255, graymax = 0;int tempr = 0, tempb = 0, tempg = 0, temprMax = 0, tempgMax = 0, tempbMax = 0;for (int j = 1; j < h - 1; j++){for (int i = 1; i < w - 1; i++){tempb = 0;tempg = 0;tempr = 0;gray = 255;graymax = 0;int[] B = new int[9] { tempMask[i * 4 + j * w * 4], tempMask[(i - 1) * 4 + (j - 1) * w * 4], tempMask[i * 4 + (j - 1) * w * 4], tempMask[(i + 1) * 4 + (j - 1) * w * 4], tempMask[(i - 1) * 4 + j * w * 4], tempMask[(i + 1) * 4 + j * w * 4], tempMask[(i - 1) * 4 + (j + 1) * w * 4], tempMask[i * 4 + (j + 1) * w * 4], tempMask[(i + 1) * 4 + (j + 1) * w * 4] };int[] G = new int[9] { tempMask[i * 4 + 1 + j * w * 4], tempMask[(i - 1) * 4 + 1 + (j - 1) * w * 4], tempMask[i * 4 + 1 + (j - 1) * w * 4], tempMask[(i + 1) * 4 + 1 + (j - 1) * w * 4], tempMask[(i - 1) * 4 + 1 + j * w * 4], tempMask[(i + 1) * 4 + 1 + j * w * 4], tempMask[(i - 1) * 4 + 1 + (j + 1) * w * 4], tempMask[i * 4 + 1 + (j + 1) * w * 4], tempMask[(i + 1) * 4 + 1 + (j + 1) * w * 4] };int[] R = new int[9] { tempMask[i * 4 + 2 + j * w * 4], tempMask[(i - 1) * 4 + 2 + (j - 1) * w * 4], tempMask[i * 4 + 2 + (j - 1) * w * 4], tempMask[(i + 1) * 4 + 2 + (j - 1) * w * 4], tempMask[(i - 1) * 4 + 2 + j * w * 4], tempMask[(i + 1) * 4 + 2 + j * w * 4], tempMask[(i - 1) * 4 + 2 + (j + 1) * w * 4], tempMask[i * 4 + 2 + (j + 1) * w * 4], tempMask[(i + 1) * 4 + 2 + (j + 1) * w * 4] };for (int n = 0; n < 9; n++){Gray[n] = (double)B[n] * 0.114 + (double)G[n] * 0.587 + (double)R[n] * 0.299;if (gray > Gray[n]){gray = Gray[n];tempb = B[n];tempr = R[n];tempg = G[n];}if (graymax < Gray[n]){graymax = Gray[n];tempbMax = B[n];tempgMax = G[n];temprMax = R[n];}}temp[i * 4 + j * w * 4] = (byte)((tempb + tempbMax) / 2);temp[i * 4 + 1 + j * w * 4] = (byte)((tempg + tempgMax) / 2);temp[i * 4 + 2 + j * w * 4] = (byte)((tempr + temprMax) / 2);}}Stream sTemp = filterImage.PixelBuffer.AsStream();sTemp.Seek(0, SeekOrigin.Begin);sTemp.Write(temp, 0, w * 4 * h);return filterImage;}else{return null;}}</strong>

[图像效果]