Win8 Metro(C#)数字图像处理--2.73一种背景图像融合特效

原文:Win8 Metro(C#)数字图像处理--2.73一种背景图像融合特效

        /// <summary>

        /// Image merge process.

        /// </summary>

        /// <param name="bacImage">The background image.</param>

        /// <param name="dstImage">The source image.</param>

        /// <param name="k">One parameter, from 0 to 1.</param>

        /// <returns></returns>

        public static WriteableBitmap ImageMerge(WriteableBitmap bacImage, WriteableBitmap dstImage, double k)

        {

            if (bacImage != null && dstImage != null)

            {

                int w = dstImage.PixelWidth;

                int h = dstImage.PixelHeight;

                int sw = bacImage.PixelWidth;

                int sh = bacImage.PixelHeight;

                WriteableBitmap srcImage = new WriteableBitmap(w, h);

                byte[] dstValue = dstImage.PixelBuffer.ToArray();

                byte[] bacValue = bacImage.PixelBuffer.ToArray();

                byte[] tempValue = new byte[dstValue.Length];

                int r = 0, g = 0, b = 0, R = 0, G = 0, B = 0;

                for (int y = 0; y < h; y++)

                {

                    for (int x = 0; x < w; x++)

                    {

                        int tx = x % sw;

                        int ty = y % sh;

                        b = bacValue[tx * 4 + ty * w * 4];

                        g = bacValue[tx * 4 + 1 + ty * w * 4];

                        r = bacValue[tx * 4 + 2 + ty * w * 4];

                        B = dstValue[x * 4 + y * w * 4];

                        G = dstValue[x * 4 + 1 + y * w * 4];

                        R = dstValue[x * 4 + 2 + y * w * 4];

                        double xr = 0.0, xb = 0.0, xg = 0.0;

                        xr = ((double)r - ((double)R - (double)k * 255.0)) / (2.0 * 255.0 * k);

                        xg = ((double)g - ((double)G - (double)k * 255.0)) / (2.0 * 255.0 * k);

                        xb = ((double)b - ((double)B - (double)k * 255.0)) / (2.0 * 255.0 * k);

                        tempValue[x * 4 + y * w * 4] = (byte)(255.0 * (1.0 - 3.0 * xb * xb + 2.0 * xb * xb * xb));

                        tempValue[x * 4 + 1 + y * w * 4] = (byte)(255.0 * (1.0 - 3.0 * xg * xg + 2.0 * xg * xg * xg));

                        tempValue[x * 4 + 2 + y * w * 4] = (byte)(255.0 * (1.0 - 3.0 * xr * xr + 2.0 * xr * xr * xr));

                    }

                }

                Stream sTemp = srcImage.PixelBuffer.AsStream();

                sTemp.Seek(0, SeekOrigin.Begin);

                sTemp.Write(tempValue, 0, w * 4 * h);

                return srcImage;

            }

            else

            {

                return null;

            }

        }

最后，分享一个专业的图像处理网站（微像素），里面有很多源代码下载：

http://www.zealpixel.com/portal.php

Win8 Metro(C#)数字图像处理--2.73一种背景图像融合特效的相关教程结束。