Tutorials

Calibrating a Monocular Camera with ROS

6 Comments / Computer Vision, Image Processing, ROS, Tutorials /

ROS use OpenCV for camera calibration but the format that it stores the data is different than OpenCV. Also, you need to know where to place the camera calibration files so ROS can find it and publish it. 1.First, you need to install usb cam package from ROS and uvcdynctrl to disable autofocus:

2.Open a terminal and run roscore: […]

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pkg-config and CMake

Leave a Comment / C++, Tutorials /

pkg-config and CMake If the library that you want to use is not coming with Find<package>. cmake you can use pkg-config files which are stored in “.pc”. The environmental variable PKG_CONFIG_PATH is the place that should point to the “.pc” files. Type in the shell:

To get the list of all available package configs, you can

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How to find CMake from arbitrary installed locations

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In my other tutorial, I showed you how to install your code in an arbitrary location in Unix/ Linux systems. In this tutorial, I’m gonna show you how to find them after installation. Here I have two examples: OpenCV, PCL point cloud I can assume that you have compiled and installed them using the following command:

1)PCL

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Installing programs into arbitrary location in Unix/ Linux systems

1 Comment / C++, Tutorials /

After you compiled and built your code, you should install it by calling sudo install to put headers and shared libraries into /usr/include/ and /usr/lib/ and configuration files into /usr/local and /usr/share usually, I don’t like to touch my system binaries and I prefer to install my compiled code into my home directory so I can safely delete them anytime. If you using

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Installing Kinect on Ubuntu 14.04 and make it run in ROS Indigo

1 Comment / Computer Vision, ROS, Tutorials /

Kinect support on Linux has a complicated history, there used to be various packages on Fuerte, Groovy and Hydro which they don’t work on ubuntu 14.10 and indigo. I’ve tried them all to find a working solution, so follow these step carefully and you will be able to read data from Kinect in ubuntu 14.10

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Converting a PCL pointcloud to a ROS pcl message/ ROS pcl message to PCL point cloud

Leave a Comment / C++, Computer Vision, ROS, Tutorials /

The relation between ROS and PCL point cloud is a little bit complicated, at first, it was part of ROS, then it became a separate project and whole the time you need some serializer and deserializer to send and receive point cloud ROS messages. There are some old deprecated ways to do that and they

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