displaying camera on rviz.
hi all, i'm trying to display a camera on rviz, the source is a camera on [Gazebo](http://www.ros.org/wiki/gazebo). rviz shows me that:>>CameraInfo -> No CameraInfo received on...
View ArticleCamera calibration and different resolutions
Under Fuerte it seems that if you change the resolution of a camera the camera info is not working any more. It thought the ROI area would be changed but does not seem to happen. Like described here:...
View ArticleGetting Camera_Info from IP Camera
Hello, Kindly need your help, Currently I am working on AR Tags detection using IP Camera. I already succeed published the ROS Image messages from my IP Camera by streaming from Camera URL using...
View Articlenao camera transform problem rviz
Hello, i am currently working with the nao and i am getting some really strange behavior, when i use the camera of the nao. But step by step: 1.) If i only start the nao camera, more specific the top...
View Articlehow to find the 3d location of a given pixel (fixed monocular camera)
Given that I have the following: - known pixels from an undistorted image (taken by monocular camera) - fixed angle of inclination of camera - fixed height of camera and flat terrain (so the height...
View Articleproblem 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: if (info_manager_->validateURL("$(find camera)/webcam.yaml")) { ROS_INFO("sucsses"); }...
View Articlextion 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 is causing problems...
View ArticleImplementing RegionOfInterest and do_rectify in camera driver for use with...
I'd like to implement support for RegionOfInterest for my camera driver but I'm not sure how to do it correctly. I'd like image_proc to be able to subscribe to the roi image and operate correctly,...
View ArticleViso2_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: -...
View Articlecamera_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...
View ArticleSetCameraInfo 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...
View ArticleBest way to publish camera_info information after stereo calibration
Hello all; I am using a stereo setup with a VrMagic camera [VrMagic D3 intelligent camera](https://www.vrmagic.com/imaging/camera-platforms/d3-intelligent-platform/). This camera runs a version of...
View ArticleCamera_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...
View Articlehow 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 package[link...
View ArticleTime synchronization when using multiple cameras with image_transport
Hello, I am using multiple USB cameras for a project and am facing problems with time synchronization. I am currently using image_transport library's subscribeCamera function to subscribe to...
View Articlepublish camerainfo: plumb_bob error! (python)
I'm trying to write a node that publish a camera_info topic: #!/usr/bin/env python import cv2 import numpy as np import rospy from sensor_msgs.msg import CameraInfo import time import yaml def...
View ArticleCamera Display is not working
Hi everyone, I know this question has been asked quite a few times, but none of the answers seemed to help me. I have quite a few bagfiles containing images. Unfortunately, the CameraInfo message...
View ArticleHow 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 topic...
View ArticleHow to get raw stereo camera calibration from left and right camera_info...
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...
View ArticleImages from fisheye camera are displayed correctly with BGR8 encoding but not...
Hi, I want to output grayscale images from a fisheye camera (FOV < 180 degree). I understand that ROS currently doesn't support fisheye [distortion...
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