As quoted in ROS Wiki “message_filters: a set of message filters which take in messages and may output those messages at a later time, based on the conditions that filter needs met.” ROS Wiki message_filters

I assume that you are a little familiar with ROS — Robot Operating System and you know how to create a ROS package, build it and run the nodes.

System details are:

• ubuntu 16.04
• ROS Kinetic
• code in C++

This blog will bluntly explain a simple example to use message_filters in ROS, specifically the Policy-Based Synchronizer which syncs (approximate time) two nodes based on the Approximate Time Policy…