Question

我使用kinect v2流来显示彩色图像和身体图像。现在我想保存彩色图像，但如果我在主线程中添加代码，我不会显示任何内容，因为在硬盘上每秒写入30个文件。所以我认为使用Thread，特别是ThreadPool，但我有框架异常：

ColorCameraSettings 'colorFrame.ColorCameraSettings' ha generato un'eccezione di tipo 'System.ObjectDisposedException'  Microsoft.Kinect.ColorCameraSettings {System.ObjectDisposedException}

这是我的代码：

private void Reader_MultiSourceFrameArrived(object sender, MultiSourceFrameArrivedEventArgs e)
    {
        var reference = e.FrameReference.AcquireFrame();
        this.StatusText = "NO BODY";

        frameCount++;
        //Console.WriteLine(frameCount);
        bool dataReceived = false;
        //sw.WriteLine("frame nuovo");
        using (ColorFrame frame = reference.ColorFrameReference.AcquireFrame())
        {
            if (frame != null)
            {

                //image.Source = ToBitmap(frame);
                ThreadPool.QueueUserWorkItem(writeColorImage, frame);


            }
        }..............

并写：

 private void writeColorImage(Object frame)
    {
        ColorFrame colorFrame = (ColorFrame)frame;
        var encoder = new PngBitmapEncoder();
        encoder.Frames.Add(BitmapFrame.Create(ToBitmap(colorFrame)));
        using (var filestream = new FileStream(filelocation + "image" + frameCount + ".jpg", FileMode.Create))
            encoder.Save(filestream);
    }
    private BitmapSource ToBitmap(ColorFrame frame)
    {
        int width = frame.FrameDescription.Width;
        int height = frame.FrameDescription.Height;
        PixelFormat format = PixelFormats.Bgr32;

        byte[] pixels = new byte[width * height * ((PixelFormats.Bgr32.BitsPerPixel + 7) / 8)];

        if (frame.RawColorImageFormat == ColorImageFormat.Bgra)
        {
            frame.CopyRawFrameDataToArray(pixels);
        }
        else
        {
            frame.CopyConvertedFrameDataToArray(pixels, ColorImageFormat.Bgra);
        }

        int stride = width * format.BitsPerPixel / 8;

        return BitmapSource.Create(width, height, 96, 96, format, null, pixels, stride);
    }

如何在硬盘上写这个图像？谢谢

Answer 1

using语句在你的frame变量上调用Dispose;但是，运行保存到磁盘的线程仍在使用对它的引用。这就是你获得例外的原因。更改此代码：

    using (ColorFrame frame = reference.ColorFrameReference.AcquireFrame())
    {
        if (frame != null)
        {
            //image.Source = ToBitmap(frame);
            ThreadPool.QueueUserWorkItem(writeColorImage, frame);
        }
    }

到此：

    var frame = reference.ColorFrameReference.AcquireFrame();
    if (frame != null)
    {
        //image.Source = ToBitmap(frame);
        ThreadPool.QueueUserWorkItem(writeColorImage, frame);
    }

然后在writeColorImage中调用Frame上的Dispose（）;像这样改变方法：

    private void writeColorImage(Object frame)
    {
        var colorFrame = (ColorFrame) frame;
        var encoder = new PngBitmapEncoder();
        encoder.Frames.Add(BitmapFrame.Create(ToBitmap(colorFrame)));
        using (var filestream = new FileStream(filelocation + "image" + frameCount + ".jpg", FileMode.Create))
        {
            encoder.Save(filestream);
        }
        colorFrame.Dispose();
    }

Answer 2

您正在线程池上启动作业后立即处理框架。你应该在工作结束时处理它。

在事件处理程序Reader_MultiSourceFrameArrived中删除使用，然后：

 private void writeColorImage(Object frame)
    {
        using (ColorFrame colorFrame = (ColorFrame)frame)
        {
            var encoder = new PngBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create(ToBitmap(colorFrame)));
            using (var filestream = new FileStream(filelocation + "image" + frameCount + ".jpg", FileMode.Create))
                encoder.Save(filestream);
        }
    }

C＃使用ThreadPool将文件写入硬盘的线程

2 个答案: