generating monocular data-set from a camera
I am implementing ORB_SLAM2 library for monocular camera. I am using ROS Lunar to process my own sequences. I want to ask that what is the best way to generate the data set from the given camera? I...
View ArticleWide angle fisheye camera for ROS
Hi, for my application, I would like to use a fish eye camera with at least 270 degree of view. Could any one recommend one with ROS (or at least C++ API) and USB support?
View Articlelidar_camera_calibration stalls
I am using the following library to try to calibrate a Velodyne LiDAR to a PiCam RGB camera: https://github.com/ankitdhall/lidar_camera_calibration. It took me a while to configure, but now everything...
View Article[ROS2] image_transport and RVIZ2 Camera, something wrong
Hi, using Rviz2 and image_transport with Crystal Clemmys I noticed that the `Camera` plugin in Rviz2 is not aligned to how `image_transport::CameraPublisher` creates the topic structure. The `Camera`...
View ArticleROS Projector Camera calibration package
I am trying to calibrate a projector-camera stereo pair. Is there a projector to camera calibration package in ROS? I am looking for something similar to the one available for the monocular or stereo...
View ArticleChanging the dictionary of aruco in aruco_ros package
I am using Logitech C270 with resolution 640x480 to detect aruco marker using aruco_ros package. I have succeeded to detect the marker when the distance between the marker and the camera is 180 cm....
View Articlecamera calibration algorithm
Hello everyone ! I've read all official tutorials of ros ( about topics and nodes, packages etc) then I wanted to calibrate my camera ( Bus 001 Device 002: ID 058f:3881 Alcor Micro Corp.)...
View ArticleProblems when relaunching camera
First time after starting PC I can launch camera by:> roslaunch usb_cam usb_cam-test.launch However after closing it, using ctrl+c in the terminal and running again I get following error: >...
View ArticleProblems when relaunching camera
I am using kinetic distribution and getting an error when relaunching camera after closing it using ctrl+c in the terminal. Error is the following one:> [ERROR] [1548665838.684033928]:>...
View ArticleHow to retrieve absolute pose in ROS
Hello, i'm currently doing the detection of ArUco and Alvar fiducial markers (glued on a cube), by that trying to grasp the cube with the detection of the marker. The camera is mounted on the Panda...
View ArticleHow to add two usb 2.0 cameras with libuvc_camera driver?
Hi! I am a student who is conducting a research. I am really appreciate your work on ROS development. But now I encountered some problems with making use of usb cameras on ROS. Below is the information...
View ArticleCamera Info Subscriber Throws Error
I am trying to subscribe to the camera info topic provided by my stereo-camera using Python: self.camera_info = rospy.Subscriber("/nerian_stereo/stereo_camera_info", CameraInfo) however, I get the...
View ArticleHow to get the correct X Y distance from depth camera
Hi, I would like to create TF for an object detected in OpenCV using depth camera. When I look at the code from the book "ROS Robotics By Example", they use the X, Y coordinate detected in the picture...
View ArticleTransform camera frame to 3D point
Hi all, I am work on kitti dataset. How can transform detected object over camera frame to 3D point cloud coordinate ? Thanks in advance!
View ArticleObtaining Camera Pose via TF
I have the calibration board fixed on the work station, and I have its world coordinates, entered them in URDF, all good. I used OpenCV's pose estimation module to find the board's pose (rvecs and...
View Articleunable to get Point Grey USB camera work in ubuntu
Hello, I have problem in using POINT GREY FIREFLY MV FMVU-13S2C digital camera to work on Ubuntu 11.04. This is the version of ubuntu. adrian@ubuntu:~$ lsb_release -a No LSB modules are available....
View ArticleHow to publish tf between base_link camera
I want to publish Transform between camera and base_link. But i am not able to please help and I have seen the predefined packages but since I use ROS kinetic I cannot use those. I have done this till...
View Articlelaunching image_view for a topic
I am trying to view the images my robot's cameras are receiving remotely. The following in the command line will bring up a window with the video stream $ rosrun image_view image_view...
View ArticleApril Tags 2 Camera Setup
I am working with apriltags2_ros to try to do a simple tracking but am unable to set up my webcam to work with the apriltags2_ros package. I am using this link as a reference,...
View Articlesensor_msgs/Image data to sensor_msgs/CompressedImage data
I have an industrial camera (DVP interface), and I added some code in the driver to convert the cv image into ros image data. I want to use this camera to test the [fiducials...
View ArticleReading Stereo Camera Calibration using rosparam
Hi all! I have a YAML file which contains calibration matrices for a stereo pair of cameras. I just can't figure out how to get the calibration data into a CameraInfoManager instance. The YAML file...
View ArticleHow to create ocupancy grid map from my camera topic
Hello, I am new to ros and gazebo, I am trying to generate an occupancy grid map using the camera topic of my robot. I also want to do an object recognition and to do an autonomous navigation. How to...
View ArticleCombine two parent-child transformations for common link
I am trying to connect two tf trees via a known link by following the advice from @tfoote...
View ArticleMoving camera with librviz does not update view
Hi, I am on Ubuntu 16.04 with ROS Kinetic and trying to move the camera position in a 3D visualizer widget programmatically using librviz. I basically followed the provided...
View Articleorbbec astra camera run the rtabmap
I used the orbbec camera to run the the new version rtabmap 0.17.6 error! but the older version rtabmap was ok.. is the camera data not met the rtabmap input data??? [ INFO] [1551257273.507102516]:...
View ArticleHow to filter camera noise
I have read this page: http://wiki.ros.org/cob_3d_mapping_filters And I wanted to ask if it is useful for me. I am using a pico flexx. And it publishes pointcloud2 data. My intention is to remove the...
View ArticleFinding the name of a camera
I'm trying to run the following ros command: rosrun ros_flydra camhistograms --camera /Basler_XXX/image_raw Where in the documentation for flydra, Basler_XXX is supposed to be replaced with the name of...
View ArticleQuestion on indoor navigation and face tracking - RPLidar or RGB-D camera or...
My requirement is to do indoor navigation/obstacle avoidance and also face detection and tracking using a ground robot (not UAV). I know that I can use RPLidar for creating occupancy grid maps but for...
View ArticleFlycapture software for point grey camera
Hi, I am trying to use the point grey camera with ROS on the jackal. I am connecting to the jackal using a wireless router connected to my MAC laptop. I am running ubuntu on a VM. I give a static IP...
View ArticleHow to read Organised Pointclouds to maintain correspondance between image...
I am reading the pcd file saved from Zed Camera into PCL point cloud. But I am not able to restore the relation between image point cloud height and width resolution. I am getting a cloud-> height...
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