[groovy beta 2] RViz doesn't receive neither image from camera topic nor TF Tree
Hello, Although with 'low-level' tools, i.e. `rostopic echo`, it is possible to get data from camera's `image_raw` topic, RViz is unable to receive any image data from camera topic saying *"No Image...
View Articledepth_image_proc point_cloud_xyzrgb transport support
Hello, I wonder if I can use different image_transport for point_cloud_xyzrgb. I was trying to stream pointcloud from a robot to remote workstation. But it was eating too much bandwith and slow. So...
View Articleopenni depth image problem
Can someone tell me why my depth image looks like that? I decompress my images of a bag like that: When I look at the thumbnails in rosbag, the image looks fine but when I use rviz or RGBD_SLAM, the...
View ArticlePublishing compressed images
Hi all, I have a camera that is giving me JPEG images. The compressed_image_transport overview says: "When writing a driver for such a camera, a quick and dirty approach is to simply copy the JPEG data...
View Articledecompression of registered depth gives weird duplicated depth image
I am recording from a kinect using: roslaunch turtlebot_bringup 3dsensor.launch; rosbag record -O rosbagtest /camera/rgb/image_color/compressed /camera/depth_registered/image_raw/compressed then...
View ArticleTrouble with compressed image transport and ardrone_autonomy
I recorded some .bag files from a few runs with the ardrone_autonomy node. I was recording the compressed image topic, and I can successfully play it back using image_view. However, I tried putting...
View ArticleWhat's the difference between message_filters and image_transport?
Hi I am using ROS Fuerte. I need to subscribe to 2 streams from the Kinect (color and depth) and use these to get 3D features. I understand to get the 2D feature I can use OpenCv and then relate this...
View Articlewin_ros, image_transport not compiling due to class_loader
I have to use a camera which has only windows drivers (Ladybug5). I thought I can use WIN_ROS for this together with the image_transport package to publish the images over the network to a Linux system...
View ArticleHow does ROS Topic data transfer work with large data streams?
I am studying ROS and I have the following question. When a node wants to transfer a relatively big data stream, for example, an image, how many TCP/IP connections are created to do such a transfer....
View ArticleCV GPU Support without losing cvBridge and image_transport
I am assuming the latest openCV compiled from scratch with GPU support enabled won't give me access to the ROS cv_bridge and image_transport that you need to in order to work with the images. How can I...
View Articleusing image transport compression and boost library c++
Hi, I have a callback that I need to run after subscribing to a ROS image topic: void imageCallback(const sensor_msgs::ImageConstPtr& original_image, int n) { .. } as you can see, the callback...
View Articlerepublish image from rospy node to roscpp node
Hi, I just want to know the right format to republish image data from a python node to a cpp node, because I keep getting an error. My python node is publishing a CompressedImage (from sensor_msgs.msg...
View ArticlePublishing an image from disk
Hi! What's te best way to solely stream an image from disk? How do I convert from cv::Mat to proper ROS image message? The relevant snippet would be: cv_bridge::CvImagePtr cv_ptr; cv_ptr->image =...
View ArticleProblem with converting image from depth to grayscale
I am trying to convert depth image from (/camera/depth/image) to grayscale image (/camera/rgb/image_mono). This is my code. #include "ros/ros.h" #include "sensor_msgs/Image.h" #include using namespace...
View ArticleConversion from floating point depth image to uint
Hi all, I recently took some rosbags of Kinect data. However, I recorded the /camera/depth/image topic instead of /camera/depth/image_raw. Consequently my data is all 32FC1 and the node I am using...
View ArticleHow to I rosbag/record a loosless compressed images
Hi I like to record raw images using rosbag. rosbag record /front_camera/image_raw Works perfect and I can view the images with rosbag play my_bag.bag & rosrun image_view image_view...
View ArticleCannot create package with opencv2 dependency using ROS Groovy
I am starting the [Image_Transport tutorials](http://ros.org/wiki/image_transport/Tutorials) and when I try to create a package with the stated dependencies I am getting the following error:...
View Articlecan't send image over network
Hi, I have 2 machines, a server and client. config on server: ROS_IP=master_ip ROS_MASTER_URI=http://master_ip:11311 config on slave: ROS_IP=slave_ip ROS_MASTER_URI=http://master_ip:11311 I have two...
View ArticleWhy does not my image_transport ROS application work with UDP?
I am developing a robotic application that sends raw stereo images (computer A) using the image_transport library. Another application receives them (computer B) and synchronizes the stereo pairs and...
View ArticleWhy am I getting worse performance with UDPROS than TCPROS?
I am doing an experiment that consists on transferring JPG compressed stereo pairs from one node to another at 5Hz. I am measuring the message transfer time using two technologies: UDPROS and TCPROS....
View Article
