Hi all, suppose there is a keypoint in the RGB + depth(depthregistered/imagerect) image and the problem is to find the corresponding point in the generated pointcloud2 (placing a marker in that location) + getting the distance (in meters) of that point from the base_link of the robot. images are collected from the Kinect on the head of the robot. I'm looking for a c++ sample code for a such problem. any suggestion? thanks.