frame issue with PointCloud2 and rviz
After reviewing the source for Velodyne I see that: 1. the velodyne_packets topic is published with "velodyne" frame id in the ROS header 2. the velodyne_points topic is published with "odom" frame id...
View ArticleGetting point cloud from image_rect_color using stereo_image_proc
I have a bag publishing left and right camera_info and image_rect_color topics. How can I use stereo_image_proc to get the point cloud? stereo_image_proc/disparity nodelet subscribes to image_rect and...
View Articledisplaying a point cloud in rviz
For experimentation's sake I am writing a node for a turtlebot that publishes data as if it were '/camera/depth/registered_points', a PointCloud2 message. I can not get rviz to show this data. I think...
View ArticleHow do i get the a PointCloud with Intensity from asus xtion?
Hello, i am trying to implement a real-time depth based obstacle detection with a asus xtion camera. I want to use the pcl library (http://pointclouds.org/) for detecting and clustering. Now i am...
View ArticleLaser scan to point cloud
Hi everyone, I'm fairly new to ROS and I've successfully recorded a rosbag with just a laser scan. I'm able to view it in RVIZ and now I'm trying to transform the scan into a point cloud. I've also a...
View ArticleColoring of pcd-pointcloud in Rviz
Hi! I am very new to ROS, so please take that into account when answering :) (Ubuntu 14.04 64bit in a VirtualBox with Windows Host, ROS Indigo) **What I did:** I used rosrun pcl_ros pcd_to_pointcloud...
View Articleoctomap decreasing probabilities when obstacle is not there anymore
Hi, I've started using octomap. Basically I've been working with `octomap_server` and it's `octomap_mapping.launch` file. I'm basically transforming my laser scan data into `pointcloud2` and then...
View ArticleWriting a Simple Subscriber
I went through the ROS tutorial for writing a simple publisher and subscriber with the '/chatter' topic, and I'm able to successfully subscribe to the 'chatter' topic and respond with the...
View Articlestereo_image_proc pointcloud extremely low frequency
Hello, I have a stereo vision system. Therefore, I'm using stereo_image_proc to get the rectified images as well as the pointcloud. As far as the rectified images, I get them at the same frequency as I...
View Articlepublishing custom pointcloud2 message
hii, I am trying to publish message on topic point cloud 2. The value of x is in double. The value of y is in double. The value of z is in double . The value of intensity in in Uchar. Can some one...
View Articlesubscribe to sensor_msg::PointCloud2
Hi, my ros subscriber is having trouble entering the callback. I'm using ROS_INFO to tell me if the callback is in. In the rqt_graph, it shows that the subscriber node is subscribed to the topic that...
View ArticleMoveIt: Octomap + Collision + Trajectory = Octomap being ignored!
Hello Community! Im currently working on a setup with MoveIt and an octomap being updated constantly, which works just fine, but now I need the robot to avoid the octomap points during planning and I...
View ArticleGetting weird values when doing a rostopic echo on a PointCloud2
We are currently working on writing a ROS driver for a new LiDAR system. When we read the values that our sensor provides they make sense as in we get something that would look like this: Point: X:...
View ArticleExtracting the (x,y,z) coordinates from pointcloud2 data in Python
Hello, I'm in the process of using a stereo camera that generates a pointcloud2 sensor message. I can open it up in rviz, and view the pointcloud. now I want to try and use the uint8[] data for a...
View Articlepointcloud2 of stereo_image_proc is inverted
Hi, I'm using a bumblebee stereo camera to create a pointcloud using stereo_image_proc. The images seem to be upright but the point cloud itself seems to be inverted. The disparity image from...
View ArticleRviz point cloud intensity channel. How does it relate to point cloud XYZI?
in my code, i have a point cloud XYZI and assign each point in the cloud with intensity value. How the intensity field in point cloud XYZI relate to intensity channel in rviz? In my understanding, the...
View ArticleExtract video from PointCloud2
I have a rosbag file with sensor_msgs/PointCloud2 data. I want to extract a video from these data. All the ROS tools I found is related to the extraction of video from an Image topic. Is it possible...
View ArticleConverting 2D lidar data to pointcloud
I have a 2D laser scan data, that means I have rotating laser sensor that is giving me distance to the object for each degree (e.i. 60° 2,5m ) and I need to process these data in the OpenCV. On the...
View Articlepublishing a vector of PointCloud2 vectors in ROS.
Hi all, I have created a custom message for a vector of PointCloud2 with name clusterVector.msg, and inside that vector I have the following line: sensor_msgs/PointCloud2[] clusterClouds This message...
View ArticleI can`t visualize a output from a PointCloud2 topic on RVIZ
I tried with a lot of codes, but, when I try to see the output topic from PointCloud2 on rviz it doesn't show any point cloud at all, I think there is a problem with the configuration of my RVIZ, but,...
View Article