Questions tagged [image-transport]
The image-transport tag has no usage guidance.
121
questions
0
votes
0
answers
23
views
How to deactivate image_transport plugins in ros2?
I am currently working with the image_transport package for publishing image topics. Among the available plugins, the latest image_transport_plugins package includes three formats: image_transport/...
0
votes
1
answer
30
views
Trouble with creating an image_transport nodelet
I'm working in ROS noetic on ubuntu 20.04
I'm pretty new to the concepts of nodelets but I felt I needed them to more efficiently go through a process of taking uncompressed images and then ...
- 3
0
votes
0
answers
20
views
ROS 1 Stereo image pairs splitter node migration to ROS 2 Galactic
I have modified the ROS 1 source from this repo to use in ROS 2 galactic
While I am able to satisfy the package dependencies, I'm having issues with the following code:
...
- 1
0
votes
1
answer
85
views
How to initialize image_transport using rclcpp
I am writing a camera node to publish compressed image whenever new image captured from a camera.
To do this, I realized that I need to initialize image_transport with node handle however I just don't ...
kyubot
0
votes
1
answer
10
views
Theora_image_transport Packet not paired through ROS1_Bridge
Hello,
Laptop on Ubuntu 20.4
Noetic and Foxy installed.
I'm running a usb_cam node on my laptop on Noetic.
When I run ROS1_bridge, the image_raw and image_raw/compressed are forwarded to ROS2 but not ...
Mechaick
0
votes
1
answer
6
views
How to publish sensor_msgs Image during node creates images
Hello,
I use a node that subscribes to the PointCloud2 message and converts them to Bird Eye View photos with subsequent storage. While the node is running, the ...
Petros ADLATUS
0
votes
1
answer
3
views
Theora image latency
I have several cameras - different models and different ros drivers - that show significant latency (about one second) between theora and image_raw, while there is no latency between compressed and ...
JoloGermanAg
0
votes
1
answer
2
views
ResizeNode subscribes and publishes camera info on the same topic
Seems like a dumb question, but I can't find the answer.
I see that image_proc::ResizeNode subscribes to /camera_info, and then generates a new CameraInfo message with the scaled intrinsics. But it ...
- 561
0
votes
1
answer
17
views
Compress Image topic with h264 streaming for low bandwidth connection?
Hello,
I faced the problem that sending the video with big resolution (1920x1080) is very difficult even with image transport. The raw or compressed images are too bit for sending over the network (...
Yehor
0
votes
1
answer
4
views
Image_transport warning of unsyncronization
Hello.
I am trying to use the package depthimage_to_laserscan. My launch file to do this is the following:
...
Alessandro Melino
0
votes
1
answer
16
views
image_transport for ROS2
Does anybody know if image_transport package is available for ROS2 foxy? Where can I download the source code? Can it be built successfully on both Ubuntu and Windows 10 platforms?
Originally posted ...
Weidong Chen
0
votes
1
answer
1
view
Camera Nodelet using GPU memory?
Hello all,
This is my first question, so apologize for any formatting mistakes.
I developed a simple driver in CPP for a IDS camera using IDS drivers and ROS nodelet.
The cameras publish using image ...
gabrielPeixoto
0
votes
1
answer
29
views
g_object_unref: assertion 'G_IS_OBJECT (object)' failed Attempt to unlock mutex that was not locked
Hello evryone, i am following this tutorial to create my image subscriber link text, using image_transport, however, i meet this problem when i run my subscriber.
(view:19049): GLib-GObject-CRITICAL
*...
N.N.Huy
0
votes
1
answer
5
views
[ROS2] image_transport only advertising raw option
Hi,
I created a ROS2 stereo camera node using image transport. I have two publisher:
...
tlaci
0
votes
1
answer
7
views
Why isn't image_transport_plugins available on ROS2 dashing?
Hello, I've been using image_transport on ROS crystal but now I would like to upgrade to dashing. I noticed ros-dashing-image-transport exists, but ros-dashing-image-transport-plugins doesn't. Why so, ...
amargs
0
votes
1
answer
4
views
How to linked ROS with OpenCV 3.4.5 dnn module? Error: undefined reference cv::dnn:experimental_dnn_v2::Net::Net()
Hi, I'm trying to use publisher-subcriber no to run my object recognition program by streaming images from my webcam. In my program, I am using readNetFromTensorflow function that provided by ...
budhie
0
votes
1
answer
11
views
Edit encoding of sensor_msgs/Image message
I have a sensor_msgs/Image message that I'm unable to use with standard ROS packages like stereo_image_proc because the "encoding" is described as "8UC1". I want it to be ...
eirikaso
0
votes
1
answer
6
views
mono16 image is wrongly formed when using compressed image_transport
I am dealing with a 16-bit mono image, publishing it using image_transport. I have no issues with the raw data topic, I can view it directly, bag it, replay it, and view again. If I run ...
autonomy
0
votes
2
answers
9
views
Can I use image transport for the two different image topics?
Using an RGBD camera (RealSense D435), we want to log compressed color images (JPEG 'compressed'), and depth images (PNG 'compressedDepth'). The realsense driver publishes these compressed topics ...
mozer
0
votes
2
answers
5
views
Create a subscriber to an Image topic
Hi,
Im trying to wrtie a node that subscribes to a image topic, however, after almost copying the ros tutorial, I keep getting an error.
The relevant parts of my code are:
...
erivera1802
0
votes
2
answers
5
views
topic remapping in synchronised message_filters
I am trying to synchronise a compressed depth image and its camera info:
...
0
votes
1
answer
5
views
Implementing SubscriberStatusCallback within ros2
Hi,
When reading image_transport source code, ended up at a point where we need to use SubscriberStatusCallback.
How do we implement the same on ros2? (LifeCycle nodes?) They do not let enable us to ...
Sriram
0
votes
1
answer
3
views
Image publisher node publishes empty header
I am trying to make a node that can both capture omnidirectional images to unwrap them and subsequently publish the resulting image in a new topic. As of now, the capturing of images for unwrapping ...
JKaiser
0
votes
1
answer
1
view
Camera Stream Muliplexer
HI Everyone,
The robot platform I am working on has 6 cameras onboard with different views.
The Coms system only has the bandwidth for one of these views, what is the best (quickest/easiest) way to ...
skipper762
0
votes
1
answer
5
views
The right way to use CameraInfo to correct barrel distortion
Environment: Kinetic, on Ubuntu 16, kernel 4.13.0-31-generic
OpenCV: 3.3.0
C++ code base
I have a USB camera which is easily publishing the raw images and the default camera_info topics, as generated ...
gemmer
0
votes
1
answer
4
views
Why do I get inverted colors in my images?
I am fetching images from a camera/webcam and publishing it's images using image_transport.
When viewed in RViz the images look correct however when recorded with ...
VictorLamoine
0
votes
1
answer
1
view
image_transport::ImageTransport Segfault
Copy and pasting the codes on
http://wiki.ros.org/cv_bridge/Tutorials/UsingCvBridgeToConvertBetweenROSImagesAndOpenCVImages
and configuring xml and Cmake accordingly:
find_package(catkin REQUIRED ...
TomHe
0
votes
1
answer
3
views
Is there an option for a blocking publish() if any subscriber's queue is full?
I have an application where several image processing nodes need to be fed by previously recorded video as fast as possible, but without dropping any frames. To keep memory overhead down, I'm using ...
infinite.loup
0
votes
2
answers
49
views
Unable to load plugin for transport 'image_transport/compressed_sub'
I am using Kinect on Ubuntu 16.04.
After executing
rosrun image_view extract_images image_transport/compressed_sub
I get
...
cduguet
0
votes
1
answer
4
views
How to get image from custom server using service?
Hello People,
I am trying to pass image from server to a client. The code complies when I use cv_bridge::toCvCopy, but it says core dumped when I actually call the image from the server. So I am ...
the_notorious_kid
0
votes
1
answer
1
view
How to pass an image (subscribed from a image publishing topic) using service?
Hello People, I am trying to get image from a camera fitted on a robot and pass them using services. I will use a client to grab images from the server and later process it according to the need. It ...
the_notorious_kid
0
votes
1
answer
3
views
SubscribeOptions for image_transport subscriber
I would like my image_transport subscriber to use a different callback queue than the global queue so that when ros::spingOnce() is called my image_transport callback is not triggered.
Normally I ...
holmes.kirby
0
votes
1
answer
2
views
Transport Image tutorial issue: subscriber doesn't show image
Hello everyone,
I tried to do the tutorial " Running the Simple Image Publisher and Subscriber with Different Transports " image_transport/Tutorials
but I encountered an issue.
When I run ...
Hysis
0
votes
1
answer
8
views
0
votes
1
answer
23
views
How to deactivate image_transport plugins?
Hi
I would like to deactivate image_transport plugins from a launch file. My robot has many cameras and I am not using the compressed images. It would save CPU time if I can do that. I would prefer a ...
Stanley666
0
votes
1
answer
4
views
Runtime Error with Image Transport in Eclipse IDE
Hi guys,
I have configured the Eclipse as my IDE and I am having no problems during compile time for my ROS packages. Once I run or enter the Debug mode, if there is an image_transport object use, it ...
Albtech
0
votes
1
answer
32
views
How to convert CompressedImage to Image?
I would like to convert CompressedImage to Image.
rosrun image_transport republish raw in:=/image_raw compressed out:=/image_raw_converted
Then, I could got ...
baozhang
0
votes
1
answer
1
view
0
votes
1
answer
5
views
Two 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. ...
lakehanne
0
votes
1
answer
3
views
image_transport rosbag issue
Has anyone else seen problems recording rosbags for all topics of a node using image_transport?
ERROR
[/tmp/buildd/ros-indigo-compressed-depth-image-transport-1.9.2-0trusty-20150729-0539/src/...
roboticom314
0
votes
1
answer
8
views
image_transport republish One Time Use
Folks,
I have several rosbags, 8 seconds long each, which only contain compressed depth images. Since rospy does not support compressedDepth (as far as I know) I am using
...
Pototo
0
votes
1
answer
1
view
How to read two in row image frames from kinect v2
EDITED:
Hello,
I am new to image processing in ROS, but I have some experience with opencv and what I want to do is to read two frames in row from kinect, take their absolute difference and detect a ...
patrchri
0
votes
1
answer
9
views
How to use image_transport with nodelets?
What I need help with:
I am having a lot of trouble getting inter-nodelet image_transport to work. I tried making my code work like one of the nodelets in the ...
rexroni
0
votes
1
answer
1
view
Can anyone give a better understanding of this piece of code?
I have a question regarding the following lines in the node given here :
...
skr_robo
0
votes
1
answer
2
views
how to change the plugin's param in launch
Hello!
I find that image_transport provides only one param (image_transport)for us to choose different compressed plugins. And ...
wsAndy
0
votes
2
answers
48
views
How to subscribe to sensor_msgs/CompressedImage without the raw image?
Recently, I recorded a large set of image data using a rosbag, but I am not able to get the subscriber working for the compressed image topic. I did not save the image_raw topic. I only saved the ...
Ralff
0
votes
1
answer
3
views
image_view stereo_view do not show image or disparity
I have been trying to view my stereo disparity image using image_view stereo_view but whenever i run it i get two blank left and right windows with the following ...
Azharudeen
0
votes
2
answers
3
views
CLion error when using the debugger and image transport
I've been trying to use Jetbrains CLion IDE for ROS programming, and for now it's working quite well. I'm able to run and debug ROS nodes, but I am having troubles with a node which uses the ...
- 5
0
votes
1
answer
1
view
get std_msgs::Header associated with a frame from image_transport?
Is there a way to get the std::msgs::Header associated with an image sent over image_transport? I need some unique key from my images to stick in the header of mesages derived from them to maintain ...
drewm1980
0
votes
1
answer
8
views
Publish depth image CV_32F using cv_bridge
Hi!
Working environment:
Kubuntu 14.04 LTS
ROS Indigo (up-to-date, full desktop install)
OpenCV 2.4.8 (default from the repos)
I have a PMD nano here and managed to get it up and running using the ...
rbaleksandar