Tutorials Archives - Page 13 of 13

How to find CMake from arbitrary installed locations

Leave a Comment / C++, Tutorials / By admin

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:

cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_PREFIX:PATH=~/usr .. && make -j8 all install

1	cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DCMAKE_INSTALL_PREFIX:PATH=~/usr .. && make -j8 all install

1)PCL …

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Installing programs into arbitrary location in Unix/ Linux systems

1 Comment / C++, Tutorials / By admin

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 / By admin

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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PCL pointcloud pairwise registration

1 Comment / Computer Vision, Tutorials / By admin

registration is aligning 3D point cloud on each other such that it gives you a complete model. To achieve this, you need to find the relative positions and orientations of each point cloud, such that you maximize the overlapping intersecting areas between them [1]. So I got the idea from here and I implemented a software …

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How to compute Inertia Tensor and centre of gravity

Learning From Demonstration

Leave a Comment / C++, Computer Vision, Machine Learning, Manipulation, ROS, Tutorials / By admin

In this work at first, I recognize the object in the scene and estimate the 6 DOF pose of that. Then I track the object by using particle filter. RGB data acquired from Kinect 2 and turned into PCL pointcloud. I demonstrate a task several times to the robot. In this case, I move an object (a detergent) over …

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Extracting images from ros bag file

1 Comment / ROS, Tutorials / By admin

Imagine you have had dumped some ros bag files in which some topics were publishing images and now you want to extract those images and save them. You can play your ros bag and then implement a node that listens to that topic and you save the data. In ros, There is a neat solution …

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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 / By admin

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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