在C#/ .NET中合并两个图像

简单的想法:我有两个想要合并的图像,一个是500x500,中间是透明的,另一个是150x150.

基本思路是:创建一个500x500的空白画布,将150x150图像放在空白画布的中间,然后将500x500图像复制到其上,使透明的中间部分允许150x150闪耀.

我知道如何在Java,PHP和Python中实现它......我只是不知道在C#中使用哪些对象/类,将图像复制到另一个中的快速示例就足够了.

1> Andreas Nied..：

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基本上我在我们的一个应用程序中使用它:我们想要在视频帧上叠加一个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) { }
    }
}

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谢谢!今天完全救了我的培根

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@AndreasNiedermair这位下来的选民可能会复制粘贴你的代码并没有奏效

2> Dustin Brook..：

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这会将图像添加到另一个图像.

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

图形位于命名空间中 System.Drawing

3> Anant Dabhi..：

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毕竟,我找到了一个新的更简单的方法试试这个..

它可以将多张照片连接在一起:

public static System.Drawing.Bitmap CombineBitmap(string[] files)
{
    //read all images into memory
    List images = new List();
    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();
        }
    }
}

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工作得很好.g.Clear(Color.Transparent)如果要合并动画精灵的PNG图像