shashankbhat's profile - activity

Hi,

I am new to rtabmap_ros. I have installed rtabmap_ros for indigo & was following steps mentioned in

• http://wiki.ros.org/rtabmap_ros

to run the demo_mapping.bag file. The problem is rtabmap_ros will open but nothing is getting displayed.

Can anyone help me out to solve this.

Even when I run roslaunch rtabmap_ros demo_robot_mapping.launch rviz:=true rtabmapviz:=false, I wont get any display

If I launch with RVIZ I can see laserscan output. But it doesn't display on rtabmapviz.

If I launch with RVIZ I can see laserscan output

roslaunch rtabmap_ros demo_robot_mapping.launch rosbag play --clock demo_mapping.bag

rtabmap_ros doesnt display any output Hi, I am new to rtabmap_ros. I have installed rtabmap_ros for indigo & was

I am notable to upload screen shot. Topics published are pointcloud & image

Point Cloud not getting displayed on Rviz in JetsonTX1 Hi, I have installed roskinect on NvidiaJetsonTX1. When I load R

@TTDM Thanks a lot for suggestion. Obviously I need to go through the tutorials. This was something I wanted in a short span of time so couldn't go through it completely.

Is it necessary to subscribe first & then publish?? May actual intension is to call a callback & publish from the callback function. Is this possible using Approximate Time policy??

Initially I was trying to run only this code, so it was not calling callback. But when I wrote a Publisher file separately & tried to subscribe it, It worked. So now I have merged both the files & this is what I found when I first wrote publisher & then subscribe it dint work, but vice-versa worked

@TTDM I tried giving larger values it doesn't work

Thanks alot @gvdhoorn

Sorry for inconvenience, I guess it is in correct format now

I want my topics to be added automatically to Rviz. Is it possible??

Wanted to know whether there are commands to add topics

Hi I am new to ROS, I am trying to synchronize two subscribed topics from last few days. I have tried almost all solutions mentioned in this forum but still struggling to get it synchronized. The callback function is never called. Below is my code as well CMakeLists.txt. Can anyone plz suggest where I am going wrong or what changes I should make.

Here is my code:

#include <message_filters/subscriber.h>
#include <message_filters/time_synchronizer.h>
#include <message_filters/synchronizer.h>
#include <message_filters/sync_policies/approximate_time.h>
#include <sensor_msgs/Image.h>
#include <boost/bind.hpp>
using namespace sensor_msgs;
using namespace message_filters;

void callback(const ImageConstPtr& image1, const ImageConstPtr& image2)
{
  ROS_INFO_STREAM("Hi I am in callback");
}

int main(int argc, char** argv)
{
  ros::init(argc, argv, "test_messge_filter");
  ros::NodeHandle nh;
  message_filters::Subscriber<Image> image1_sub(nh, "image1", 1);
  message_filters::Subscriber<Image> image2_sub(nh, "image2", 1);
  typedef sync_policies::ApproximateTime<Image, Image> MySyncPolicy;
// ApproximateTime takes a queue size as its constructor argument, hence MySyncPolicy(10)
  Synchronizer<MySyncPolicy> sync(MySyncPolicy(10), image1_sub, image2_sub);
  sync.registerCallback(boost::bind(&callback, _1, _2));
  ros::spin();
  return 0;
}


CMakeLists.txt:
find_package(catkin REQUIRED COMPONENTS
pcl_ros  
roscpp
sensor_msgs 
image_transport  
message_filters  
std_msgs
message_generation 
cv_bridge
)
find_package(OpenCV REQUIRED)
find_package(Boost REQUIRED COMPONENTS 
signals
) 

catkin_package()
include_directories(
${catkin_INCLUDE_DIRS} 
${OpenCV_INCLUDE_DIRS} 
${Boost_INCLUDE_DIRS}
)

add_executable(pub_sub_image_pointcloud src/pub_sub_image_pointcloud.cpp)
target_link_libraries(pub_sub_image_pointcloud

${catkin_LIBRARIES}  
${OpenCV_LIBRARIES}
${Boost_LIBRARIES}
 )