Win8Metro(C#)数字图像处理--2.28图像乘法运算

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[函数名称]

图像乘法函数MultiplicationProcess(WriteableBitmap src, WriteableBitmap mulSrc)

[函数代码]

        /// <summary>/// Multiplication of two images(Both of them should be in same size)./// </summary>/// <param name="src">The first source image.</param>/// <param name="maskSrc">The second source image(It is an mask that each pixel of it  is 0 or 1).</param>/// <returns></returns>public static WriteableBitmap MultiplicationProcess(WriteableBitmap src, WriteableBitmap maskSrc)28图像乘法{if (src != null){int w = src.PixelWidth;int h = src.PixelHeight;WriteableBitmap mulImage = new WriteableBitmap(w, h);byte[] temp = src.PixelBuffer.ToArray();byte[] mulTemp = maskSrc.PixelBuffer.ToArray();byte[] dst = new byte[w * h * 4];int r = 0, g = 0, b = 0;for (int i = 0; i < w; i++){for (int j = 0; j < h; j++){b = temp[i * 4 + (h - 1 - j) * w * 4] * mulTemp[i * 4 + (h - 1 - j) * w * 4];g = temp[i * 4 + 1 + (h - 1 - j) * w * 4] * mulTemp[i * 4 + 1 + (h - 1 - j) * w * 4];r = temp[i * 4 + 2 + (h - 1 - j) * w * 4] * mulTemp[i * 4 + 2 + (h - 1 - j) * w * 4];dst[i * 4 + j * w * 4] = (byte)(b > 0 ? (b < 255 ? b : 255) : 0);dst[i * 4 + 1 + j * w * 4] = (byte)(g > 0 ? (g < 255 ? g : 255) : 0);dst[i * 4 + 2 + j * w * 4] = (byte)(r > 0 ? (r < 255 ? r : 255) : 0);dst[i * 4 + 3 + j * w * 4] = 0;b = 0; g = 0; r = 0;}}Stream sTemp = mulImage.PixelBuffer.AsStream();sTemp.Seek(0, SeekOrigin.Begin);sTemp.Write(dst, 0, w * 4 * h);return mulImage;}else{return null;}      }