[函數名稱]html
圖像馬賽克效果 MosaicProcess(WriteableBitmap src, int v)算法
[算法說明]函數
圖像馬賽克效果其實就是將圖像分紅大小一致的圖像塊,每個圖像塊都是一個正方形,而且在這個正方形中全部像素值都相等。咱們能夠將這個正方形看做是一個模板窗口,模板中對應的全部圖像像素值都等於該模板的左上角第一個像素的像素值,這樣的效果就是馬賽克效果,而正方形模板的大小則決定了馬賽克塊的大小,即圖像馬賽克化的程度。spa
[函數代碼].net
<strong> /// <summary> /// Mosaic process. /// </summary> /// <param name="src">The source image.</param> /// <param name="v">The threshould to control the result of mosaic process.</param> /// <returns></returns> public static WriteableBitmap MosaicProcess(WriteableBitmap src, int v)////圖像馬賽克效果 { if (src != null) { int w = src.PixelWidth; int h = src.PixelHeight; WriteableBitmap srcImage = new WriteableBitmap(w, h); byte[] temp = src.PixelBuffer.ToArray(); byte[] tempMask = (byte[])temp.Clone(); int dR = 0; int dG = 0; int dB = 0; int dstX = 0; int dstY=0; dR = tempMask[2]; dG = tempMask[1]; dB = tempMask[0]; for (int j = 0; j < h; j++) { for (int i = 0; i < w; i++) { dstX = i; dstY = j; if (j % v == 0) { if (i % v == 0) { dB = tempMask[dstX * 4 + dstY * w * 4]; dG = tempMask[dstX * 4 + 1 + dstY * w * 4]; dR = tempMask[dstX * 4 + 2 + dstY * w * 4]; } else { temp[dstX * 4 + dstY * w * 4] = (byte)dB; temp[dstX * 4 + 1 + dstY * w * 4] = (byte)dG; temp[dstX * 4 + 2 + dstY * w * 4] = (byte)dR; } } else { temp[dstX * 4 + dstY * w * 4] = temp[dstX * 4 + (dstY - 1) * w * 4]; temp[dstX * 4 + 1 + dstY * w * 4] = temp[dstX * 4 + 1 + (dstY - 1) * w * 4]; temp[dstX * 4 + 2 + dstY * w * 4] = temp[dstX * 4 + 2 + (dstY - 1) * w * 4]; } } } Stream sTemp = srcImage.PixelBuffer.AsStream(); sTemp.Seek(0, SeekOrigin.Begin); sTemp.Write(temp, 0, w * 4 * h); return srcImage; } else { return null; } }</strong>
[圖像效果]code