放大图片（真实放大，不加任何其他处理）

/// <summary>/// 放大图片/// </summary>/// <param name="img"></param>/// <param name="times"></param>/// <returns></returns>public static Bitmap ZoomInTimesByMomery(Bitmap img, int times){//初始化大小图片Bitmap bmp = FormatHelper.FromHighbitTo24bit(img);Bitmap largeBmp = new Bitmap((int)(img.Width * times), (int)(img.Height * times), PixelFormat.Format24bppRgb);Rectangle bmpRect = new Rectangle(0, 0, bmp.Width, bmp.Height);Rectangle largeBmpRect = new Rectangle(0, 0, largeBmp.Width, largeBmp.Height);BitmapData bmpData = bmp.LockBits(bmpRect, ImageLockMode.ReadOnly, bmp.PixelFormat);BitmapData largeBmpData = largeBmp.LockBits(largeBmpRect, ImageLockMode.WriteOnly, largeBmp.PixelFormat);int bytes = bmpData.Stride * bmp.Height;int largBytes = largeBmpData.Stride * largeBmp.Height;byte[] rgbValues = new byte[bytes];byte[] largeRgbValues = new byte[largBytes];IntPtr ptr = bmpData.Scan0;IntPtr largePtr = largeBmpData.Scan0;Marshal.Copy(ptr, rgbValues, 0, bytes);Marshal.Copy(largePtr, largeRgbValues, 0, largBytes);//循环遍历所有原始图片像素for (int Y = 0; Y < bmpData.Height; Y++){for (int X = 0; X < bmpData.Width * 3; X += 3){//获取像素rgb值byte b = rgbValues[Y * bmpData.Stride + X];byte g = rgbValues[Y * bmpData.Stride + X + 1];byte r = rgbValues[Y * bmpData.Stride + X + 2];//循环设置对应的所有放大图片像素点for (int yTime = 0; yTime < times; yTime++){for (int xTime = 0; xTime < times; xTime++){largeRgbValues[(Y * times + yTime) * largeBmpData.Stride + X * times + 3 * xTime] = b;largeRgbValues[(Y * times + yTime) * largeBmpData.Stride + X * times + 3 * xTime + 1] = g;largeRgbValues[(Y * times + yTime) * largeBmpData.Stride + X * times + 3 * xTime + 2] = r;}}}}Marshal.Copy(rgbValues, 0, ptr, bytes);Marshal.Copy(largeRgbValues, 0, largePtr, largBytes);bmp.UnlockBits(bmpData);largeBmp.UnlockBits(largeBmpData);return largeBmp;}