Visualize pointcloud
<p>I have 3D points from gpu::reprojectImageTo3D on a found disparity image. I would now like to display this pointcloud.</p>

<p>How do I Convert the found pointcloud from <code>OpenCV</code> to <code>sensor_msgs/PointCloud2</code> ?</p>

<p>I do not need to publish the pointcloud this is only for debug visualization. Could it be possible to display it as is done with images from the node? e.g. using <code>pcl</code>? This would be optimal since my device may not perform well with <code>RViz</code> (based on readings online).</p>