缩放后图像损坏答案

【问题标题】：Image corrupted after zooming缩放后图像损坏
【发布时间】：2015-05-19 14:02:54
【问题描述】：

我正在使用 Microsoft Kinect SDK v2 从 Kinect V2 传感器读取颜色帧。我将帧数据复制到字节数组中，稍后将其转换为 EmguCV 图像。下面是代码中的sn-p-

// A pixel buffer to hold image data from the incoming color frame
private byte[] pixels = null;
private KinectSensor kinectSensor = null;
private ColorFrameReader colorFrameReader = null;
public KinectForm()
{
    this.kinectSensor = KinectSensor.GetDefault();
    this.colorFrameReader = this.kinectSensor.ColorFrameSource.OpenReader();
    this.colorFrameReader.FrameArrived += this.Reader_ColorFrameArrived;
    // create the colorFrameDescription from the ColorFrameSource using Bgra format
    FrameDescription colorFrameDescription = this.kinectSensor.ColorFrameSource.CreateFrameDescription(ColorImageFormat.Bgra);
    // Create a pixel buffer to hold the frame's image data as a byte array
    this.pixels = new byte[colorFrameDescription.Width * colorFrameDescription.Height * colorFrameDescription.BytesPerPixel];
    // open the sensor
    this.kinectSensor.Open();
    InitializeComponent();
}

private void Reader_ColorFrameArrived(object sender, ColorFrameArrivedEventArgs e)
{
    using (ColorFrame colorFrame = e.FrameReference.AcquireFrame())
    {
        if (colorFrame != null)
        {
            FrameDescription colorFrameDescription = colorFrame.FrameDescription;
            if (colorFrame.RawColorImageFormat == ColorImageFormat.Bgra)
                colorFrame.CopyRawFrameDataToArray(pixels);
            else
                colorFrame.CopyConvertedFrameDataToArray(this.pixels, ColorImageFormat.Bgra);

            //Initialize Emgu CV image then assign byte array of pixels to it
            Image<Bgr, byte> img = new Image<Bgr, byte>(colorFrameDescription.Width, colorFrameDescription.Height);
            img.Bytes = pixels;

            imgBox.Image = img;//Show image in Emgu.CV.UI.ImageBox
        }
    }
}

转换后的图像在缩放超过 25% 后损坏。请看下面的截图-

50% 缩放 -

25% 缩放 -

12.5% 缩放 -

【问题讨论】：

标签： image kinect emgucv

【解决方案1】：

应该是Bgra，你可以从“pixels”字节数组中确认。

编辑：由于 Kinect 的色框强度为 0，图像将不可见，所以我添加了此代码来解决问题，希望有更好（更快）的方法来解决。

private void FixIntensity(byte[] p)
    {
        int i = 0;
        while (i < p.Length)
        {
            p[i+3] = 255;
            i += 4;
        }
    }

【讨论】：