在C＃/。NET中合并两个图像

简单的想法：我有两个我想要合并的图像，一个是500×500，中间透明，另一个是150×150。

基本思想是这样的：创build一个500×500的空白canvas，将150×150的图片放置在空白的canvas中间，然后将500×500的图片复制到透明的中间，让150×150能够透过。

我知道如何在Java，PHP和Python中做…我只是不知道在C＃中使用什么对象/类，将图像复制到另一个的快速示例就足够了。

Answer 1

基本上我在我们的一个应用程序中使用这个：我们想要在一个video帧上覆盖一个playicon：

Image playbutton; try { playbutton = Image.FromFile(/*somekindofpath*/); } catch (Exception ex) { return; } Image frame; try { frame = Image.FromFile(/*somekindofpath*/); } catch (Exception ex) { return; } using (frame) { using (var bitmap = new Bitmap(width, height)) { using (var canvas = Graphics.FromImage(bitmap)) { canvas.InterpolationMode = InterpolationMode.HighQualityBicubic; canvas.DrawImage(frame, new Rectangle(0, 0, width, height), new Rectangle(0, 0, frame.Width, frame.Height), GraphicsUnit.Pixel); canvas.DrawImage(playbutton, (bitmap.Width / 2) - (playbutton.Width / 2), (bitmap.Height / 2) - (playbutton.Height / 2)); canvas.Save(); } try { bitmap.Save(/*somekindofpath*/, System.Drawing.Imaging.ImageFormat.Jpeg); } catch (Exception ex) { } } } 

Answer 2

这将添加一个图像到另一个。

 using (Graphics grfx = Graphics.FromImage(image)) { grfx.DrawImage(newImage, x, y) } 

graphics位于System.Drawing的命名空间中

Answer 3

毕竟，我发现一个新的更简单的方法试试这个..

它可以将多张照片合并在一起：

 public static System.Drawing.Bitmap CombineBitmap(string[] files) { //read all images into memory List<System.Drawing.Bitmap> images = new List<System.Drawing.Bitmap>(); System.Drawing.Bitmap finalImage = null; try { int width = 0; int height = 0; foreach (string image in files) { //create a Bitmap from the file and add it to the list System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(image); //update the size of the final bitmap width += bitmap.Width; height = bitmap.Height > height ? bitmap.Height : height; images.Add(bitmap); } //create a bitmap to hold the combined image finalImage = new System.Drawing.Bitmap(width, height); //get a graphics object from the image so we can draw on it using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(finalImage)) { //set background color g.Clear(System.Drawing.Color.Black); //go through each image and draw it on the final image int offset = 0; foreach (System.Drawing.Bitmap image in images) { g.DrawImage(image, new System.Drawing.Rectangle(offset, 0, image.Width, image.Height)); offset += image.Width; } } return finalImage; } catch (Exception ex) { if (finalImage != null) finalImage.Dispose(); throw ex; } finally { //clean up memory foreach (System.Drawing.Bitmap image in images) { image.Dispose(); } } }