matlab - 3 channel 深度图像1 channel

Question

我使用 Kinect v2 录制了一个深度视频，当我使用 MATLAB 提取图像时，每个 image是3 channel 。通常我看到的图像只有 1 个 channel 。请任何人告诉我如何将这个 3 channel 图像变成 1 channel ？

深度部分的代码如下:

IplImage depth = new IplImage(512, 424, BitDepth.U16, 1);
CvVideoWriter DepthWriter;
Width = sensor.DepthFrameSource.FrameDescription.Width;
DHeight = sensor.DepthFrameSource.FrameDescription.Height;
WbDepth = new WriteableBitmap(DWidth, DHeight, 96, 96, PixelFormats.Gray16, null);
int depthshft = (int)SliderDepth.Value;
using (DepthFrame depthframe = frame.DepthFrameReference.AcquireFrame())
ushort* depthdata = (ushort*)depth.ImageData;
if (depthframe != null)
   {
    Depthdata = new ushort[DWidth * DHeight];
    ushort[] Depthloc = new ushort[DWidth * DHeight];
    depthframe.CopyFrameDataToArray(Depthdata);
    for (int i = 0; i < DWidth * DHeight; i++)
        {
          Depthloc[i] = 0x1000;
        }
        colorspacePoint = new ColorSpacePoint[DWidth * DHeight];
        depthspacePoint = new DepthSpacePoint[CWidth * CHeight];
        sensor.CoordinateMapper.MapDepthFrameToColorSpace(Depthloc, colorspacePoint);
        for (int y = 0; y < DHeight; y++)
            {
            for (int x = 0; x < DWidth; x++)
                {
                if (depthshft != 0)
                   {
                    Depthdata[y * DWidth + x] = (ushort)((Depthdata[y * DWidth + x]) << depthshft);
                   }

                 }
             }
         depth.CopyPixelData(Depthdata);
 }
WbDepth.WritePixels(new Int32Rect(0, 0, DWidth, DHeight), Depthdata, strideDep, 0);
ImageDepth.Source = WbDepth;
if (depth != null && DepthWriter.FileName != null) Cv.WriteFrame(DepthWriter, depth);
Cv.ReleaseVideoWriter(DepthWriter);
if (CheckBox_saveD.IsChecked == true)
DepthWriter = new CvVideoWriter(string.Format("{1}\\Scene{0}_DepthRecord.avi", scene, TextBlock_saveloca.Text.ToString()), FourCC.Default, 30.0f, new CvSize(512, 424));
CheckBox_saveD.IsEnabled = false;
if (CheckBox_saveD.IsChecked == true) Cv.ReleaseVideoWriter(DepthWriter);

谢谢

Answer 1

到目前为止，每个人都建议您将(假定的)彩色图像转换为灰度图像。 我认为你不应该这样做。kinect 为您提供深度值的“1 channel ”图像。如果您有彩色(3 channel )深度图，则说明有问题。转换为灰度会使您失去深度信息。

相反，首先尝试弄清楚为什么您的图像以灰度加载。来源是什么？读取图像时是否可以通过 Matlab 完成转换？然后你可以给它一些标志告诉它不要这样做吗？