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Ros2 Humble camera info url ignored when publishing from rtsp stream

before I get started, I'd like to point out that I have done thorough research and studied all similar issues I could find. Unfortunately I didn't find a solution that worked for my problem. I am ...
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Camera info problem when trying to see topic in rqt

I am executing a camera_info topic with as this: ...
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How to scale gazebo garden camera_info with resolution

for background, I'm detecting the pose of objects based on detected pixels using image_geometry. I've tested this code IRL with an oak-d and found it accurate against a ground truth, so it's working ...
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1 answer
163 views

How to use stereo_image_proc without camera_info topics?

I'm working with 2 csi cameras in a jetson nano with ROS2 humble and I want to do a disparity image. What I'm trying to use is stereo_image_proc disparity node, but it requires to have the camera_info ...
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1 answer
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Why is camera_info typically a topic?

If the camera extrinsics/intrinsics are usually fixed parameters, why is there usually a camera_info topic for cameras instead of having the extrinsics/intrinsics be in a parameter server? Originally ...
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1 answer
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What are the information represented by echo the topic of camera_info and image_raw?

Hi, I am using a multi camera plugin with SDF and the left and right images are published well in Rviz2. I wish to know the depth/distance of the object from the camera based on the images produced ...
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1 answer
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How to publish more than 5 distortion parameters through sensor_msgs::CameraInfo structure?

Hi guys. I have a node which publishes images to /image_raw topic and camera calibration data to /camera_info topic. It is setting lens distortion coefficients using the "d" vector of ...
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1 answer
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Visualize camera_info as a set of four image corner rays emanating from the camera origin in rviz?

I think this already exists (maybe it was one package among many in a github repo used in a robotics competition a few years ago), but I'm not finding it now. It would be nice to see where the ...
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1 answer
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how to understand image topic frame orientation?

Hello everyone, as the title says, I want to ask how to figure out how the frame orientation of an image is set, any ideas ? Originally posted by Ifx13 on ROS Answers with karma: 54 on 2021-07-12 ...
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1 answer
19 views

Is there a topic for camera FOV info?

Hi, I'd like to publish info about the field of view of a camera, but I cannot find a standard topic for this information. Before creating a custom topic I want to be sure that there is nothing just ...
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1 answer
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How to get raw stereo camera calibration from left and right camera_info messages

Hi guys, I am trying to obtain the stereo un-rectified calibration (that is un-rectified extrinsics R and t; and calibration matrix K for each camera) from the left_camera_info.yaml and the ...
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1 answer
7 views

Stereo Camera Info Subscriber Throws Error

I am trying to subscribe to the camera info topic provided by my stereo-camera using Python: ...
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3 answers
6 views

How to execute a ros callback just once

I want to subscribe to openni's "camera/rgb/camera_info" topic to get the camera matrix. Since the matrix doesn't change, I would like to execute the callback just once. How could I achieve ...
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1 answer
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Images from fisheye camera are displayed correctly with BGR8 encoding but not with MONO8

Hi, I want to output grayscale images from a fisheye camera (FOV < 180 degree). I understand that ROS currently doesn't support fisheye distortion models. However, I see that if I use a BGR8 image ...
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1 answer
298 views

How to use camera_info_manager to publish camera_info

I am trying to calibrate my ov7251 camera using the camera_calibration package. I adapted a sample camera driver that I found which use the UV4L API so that I can try to publish images to the ROS ...
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1 answer
18 views

how to publish camera_info manually

I have a rosbag file which publishes the stereo images (left_image and right_image) but there is no camera_info attached to it.I want use the stereo_image_process packagelink text to get the point ...
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1 answer
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Camera_info for a camera publishing already rectified images

I have a camera which gives me images which are already rectified. I'm writing the ROS driver for it and I'm wondering what I should do with the camera_info message. Should I : Calibrate the camera ...
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1 answer
11 views

SetCameraInfo successfully called but no change in /camera_info topic

Hello there, I am trying to write a little C++ package to apply custom made calibration files to my indigo system using the following code (inspired by this thread): ...
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1 answer
5 views

camera_info override

Hi! I've been using an android app to pipe the camera image into ROS. This works moderately well, even though there is some lag to get the image. The problem is that the published /camera/camera_info ...
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1 answer
3 views

Viso2_ros without camera_info

Hi all, I'm trying to compute visual odometry using a stream of images (left and rigth) from a server These images come without camera_info, but i have a calibration file cam0: T_cam_imu: [0....
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1 answer
5 views

xtion depth image size problem

Hi All, I can't work out why, when I use ROS Topic I'm seeing that the depth frame size is "height: 120xwidth: 160" but the camera info is reporting "height: 480xwidth: 640" This ...
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1 answer
4 views

problem with camera info

Hi guys I tried to load my camera info from one yaml that I created with camera calibrate. I wrote this code: ...
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1 answer
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About the camera calibration parameters

Hi, I have been looking at the camera calibration parameters generated during the calibration and the explanation of the cameraInfo parameters in the ROS wiki. I can't figure out what the K' matrix is ...
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1 answer
2 views

Problem with rgbdslam and QVGA resolution

Hi, I'm trying to run rgbdslam with the openni_launch packet setted to qvga via dynamic reconfigure, but when I try I get the following error: ...
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1 answer
9 views

rviz Camera display incorporating CameraInfo operational parameters?

Does rviz support incorporating the operational parameters described in the camera_info message (sensor_msgs/CameraInfo) when overlaying the data from elsewhere (robot model, tf, markers) while ...
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1 answer
6 views

Read images from disk, publish as camera

I have a dataset of images on disk, along with a set of camera parameters (though they are not in ROS camera_info file format). I am trying to make a node that reads and publish de images in round ...
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2 answers
4 views

Replacing camera_info messages

Is there any easy way to replace the camera_info messages stored in a bag file. In particular when using either the image_proc or stereo_image_proc nodes. Originally posted by Hordur on ROS Answers ...
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1 answer
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Distorted images after camera calibration+stereo_image_proc

Hello everyone! This question might not be specific to ROS, but I decided to give it a try anyway. I am using stereo_image_proc to rectify my camera's image output and produce the corresponding ...
0 votes
1 answer
5 views

how to call service set_camera_info of gscam package

Hi everybody, I'd like to call set_camera_info (sensor_msgs/SetCameraInfo) of gscam (http://www.ros.org/wiki/gscam). To do this, I've built a simple application: ...
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1 answer
24 views

displaying camera on rviz

hi all, i'm trying to display a camera on rviz, the source is a camera on Gazebo. rviz shows me that: CameraInfo -> No CameraInfo received on [/finger_tip_cam/camera_info]. Topic ...
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1 answer
7 views

sending sensor_msgs/CameraInfo with rosjava

Hello, I'm attempting to send a sensor_msgs/CameraInfo message using rosjava. The message itself gets sent just fine, but I'd like to fill in every field of the message with my correct camera ...
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1 answer
2 views

Rosbag: Recording configurations or regenerate later?

I've been wondering what's the ideal way to deal with changing configurations that get published over the wire. This can get very complex, but I'm hoping someone has experience with this (I'm sure ...
0 votes
1 answer
6 views

how to advertise set_camera_info service?

I have been trying to calibrate my camera using monocularcalibration node and it seems to be working fine. Now I have published my cameraInfo message but it ends up with an error saying ...
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2 answers
99 views

how to publish sensor_msgs::CameraInfo messages?

I am unable to publish the CameraInfo messages. I have the image data published from the camera using the image_transport::Publisher but the same is not publishing the camera info messages. I am ...
0 votes
1 answer
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How to calibrate videre_stereo_camera

I am trying to calibrate a videre stereo camera.I am using the Videre_stereo_cam from ua_drivers package as drivers for the camera.I tried to calibrate the camera by following this tutoriallink text ...
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2 answers
5 views

TF Frame Convention for Stereo Cameras

I am using a stereo camera for both stereo reconstruction and monocular image processing. Since I am not calibrating the pair of cameras twice, I am doing all of the monocular processing using the ...
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2 answers
3 views

How to get real-world width & height of Kinect video patch?

Hello, I am trying to compute the real-life size (width and height in meters) of a face patch that I have detected using a Kinect and OpenCV's Haar detector. I know the pixel dimensions of the patch ...
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1 answer
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wrong camera_info broadcasted with camera1394

Hello, I am trying to use the ~camera_info_url parameter of camera1394. I created the following config file: ...
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1 answer
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Camera_model segfault. Does it require a "real" camera_info not to crash?

Hello, I am working on a node that colors point clouds with a camera image. My strategy is to project each point on the camera image plane, and find the corresponding pixel color. In order to do so, I ...