how to use concatenatePointCloud
I am publishing /tf with a tf_broadcaster node. Also I am publishing with velodyne_driver node. Then the velodyne_pointcloud Transform nodelet is suscribed to both previous topics, applies the tf to...
View Articlepointcloud_to_laserscan returns inf in ROS indigo.
Hi, I am using ROS indigo under UBUNTU 14.04. I am also simulating a turtlebot equipped with kinect camera in v-rep and would like to run gmapping through ROS. Since gmapping requires laserscan data,...
View Articlechanging rgb values of /camera/depth_registered/points - not visible!
I am working on a ROS node which subscribes to /camera/depth_registered/points and convert in to a pcl::PointCloud. From there, I explicitly set the rgb values of each point (using the rgb unpacking...
View ArticlePCL Pointcloud type conversion/pointer issue
As I want to get used to the PCL library, I tried to test switching between PointCloud and PointCloud2 types. The node corresponding to the following callback function compiles, but produces a...
View Articlemultiple pointcloud2 to one single laserscan
Hello there, I have a robot using 2 3D cámeras (both different) Astra Pro and Pico_flexx, both them get a different pointcloud output but both are pointcloud2, one of those cámeras is watching forward...
View ArticleProper way to transform a point cloud
Hello, I am using V-REP to simulate a vehicle with a Velodyne. To simulate the behavior of the real Velodyne, I transform at each simulation pass the captured points to the /odom frame. This is to...
View ArticleRGB and Depth sensor_msgs::Image vs XYZRGB sensor_msgs::PointCloud2
Hello, So I have ROS running across multiple machines on a limited network, and I have two possibilities, transfer a XYZRGB sensor_msgs::PointCloud2 directly or two sensor_msgs::Image (one rgb and one...
View ArticlepointCloud2 to pcl::pointcloud conversion
I am using velodyne VLP16. The information I am getting from it is "unordered" pointCloud2. I am having a trouble to translate it to pcl::pointcloud. According to the code provided online [here]...
View ArticlePointCloud2 access data
I have a PointCloud2 topic and I need to access the x, y and z of the points. I have found: pcl::PointCloud::ConstPtr The problem is that I don't know how to use it. Do you know where can I find some...
View Articleconvert VLP16 sensor_msgs/PointCloud2 to sensor_msgs/LaserScan
I would like to test a library that require a sensor *_msgs/LaserScan* topic. I found this question http://answers.ros.org/question/9450/how-to-setup-pointcloud_to_laserscan/ but I am pretty new to ROS...
View ArticleTrack faces when Kinect is mounted sideways.
I've got a Kinect mounted sideways on my setup, and it needs to stay that way, and detect faces. All the libraries I've tried don't recognize a sideways face. I have a node that publishes a PointCloud2...
View ArticleTwo Topics with Same Callback
Hi everyone, I am subscribing to two different topics (each with different md5sums) using a single callback. I am using the `message_filters` class to achieve this. In my broadcaster, I am publishing...
View ArticleSensor publish a pointcloud2 msg to ROS
Hey, is there any 3D LiDAR sensors in Gazebo which publish a pointcloud2 msg to ROS? thx a lot
View ArticleDatatype to access pointcloud2
Hello all, i am working on pobot object detection project and m totally new at Ros. so far in project we have published pointclouds but can anyone tell me after subscribing to a pointcloud2 message...
View ArticlePut sensor_msgs::PointCloud into row of sensor_msgs::PointCloud2
Hey all, I am currently trying to create a function that will take a sensor_msgs::PointCloud that has 953 points in it and replace a row of a sensor_msgs::PointCloud2 that has height 36 and width 953...
View Articlehow to use Velodyne VLP16 and laser_scan_matcher with cloud input?
I have a robot equipped with a 3D-Lidar (Velodyne VLP16) and want to use laser_scan_matcher (http://wiki.ros.org/laser_scan_matcher) to estimate it's position. The velodyne driver...
View ArticleStart with costmap_2d
Hello friends, looking for some tutorials from where i can create a simple occupancy grid map from pointclouds i.e. conversion of sensor_msgs/pointcloud2 to nav_msgs/occupancygrid. I found costmap_2d...
View ArticleConversion from sensor_msgs::PointCloud2 to pcl::PointCloud
Hi all, I am digging deep in this forum, but I'm getting lost. I am using ROS Groovy and receiving a sensor_msgs::PointCloud2 from a depth_image_proc nodelet and I want to process it using PCL 1.7....
View ArticleRos publish() taking more time than expected
Dear All I have observed a strange behavior in my node. I am trying to publish pointcloud topic and subscribing in another node. While profiling the pointcloud node I have observed the publish() method...
View Articlenode crashes after rosrun !!
hi guys i am doing blobdetection and tracking ,,, in ros i have implemented something using point cloud to get my x y and z ,, but while catkin_make i have no errors but after rosrun the image is not...
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