Camera calibration crashes
While trying to use camera calibration with the command rosrun camera_calibration cameracalibrator.py --size 8x6 --square 0.03 image:=/camera/image camera:=/camera the utility crashes, sometimes during...
View Articleusing calibrationdata.tar.gz file in a launch file
I calibrated my 2 usb cameras (using usb_cam driver) with the camera_calibration tool in stereo vision. As a result I got a /tmp/calibrationdata.tar.gz file. Since I couldn't use the commit function of...
View Articleros_camera_info service not found for usb_cam
Hi! I use 2 USB cameras for stereo vision with the usb_cam driver in ROS Groovy and I would like to calibrate them with the camera_calibration package. I start the cameras with the following launch...
View Articlecan we move the camera during camera calibration
Hi, I am calibrating the camera using the camera_calibration package. I am wondering if the camera can be moved during camera calibration. Is it equivalent to moving the checker board in various...
View Articlehow do I tune the rgb.yaml such that black bands don't come out?
I have successfully install avin2 kinect driver. But the screen has black bands scanning from bottom to up. how do I get rid of it by tuning the rgb.yaml, can I ?
View ArticleNeed a camera with constant focus
Hello, I use a usb camera to localize NAO robot by tracking a marker placed on its head (using ar_pose marker tracker). My problem is with the camera autofocus which results in the poor performance...
View Articlevisp_camera_calibration doesn't write the calibartion.ini file
I do all the proceding told on the tutorial for the calibration of an external camera from the ROS wiki. The camera i'm trying to calibrate is the one on the Parrot ARDrone. Everything works fine and...
View ArticleProblem with the image_pipeline camera_calibration nodes
Hi community, I'm trying to use the image_pipeline-package to realize a stereovisual system with ros and opencv. When I use the node for calibration of one usb-camera I get an error every time I put...
View ArticleCamera pose registration w.r.t. a robot base.
Dear all, I would like to set up a Kinect or another camera in a space where a robot (a kuka lwr) will operate. The camera will be fixed w.r.t. the robot base. There is some software that computes the...
View ArticleAbout 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...
View ArticleCan't see epi and dim on camera calibration
Hi, I've been doing the stereo camera calibration with no issues except that I am not able to see the epi and dim parameters after performing the actual calibration. I am assuming this is a graphics...
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 ArticlePrint the Camera parameters from the file created after Camera Calibration
I have calibrated my monocular camera using the ROS Tutorial. After calibrating the camera, a `.yaml` file got created which contains the various parameters of the camera. **Task:** I want to print the...
View ArticleRos is missing camera_calibration package
When running the follower demo, we get the warning camera_calibration package is missing. We downloaded the file but are unsure what directory to place it in. Please let us know where it goes.
View Articlecamera_calibration
when i try to make sure that my monocular camera is publishing images over ROS by typing the """rostopic list """ the following error appear """ERROR: Unable to communicate with master! """""" , How...
View Articlestereo_calibration - rotation and translation matrix from output?!
I did a stereo calibration of two rgb-cameras with the camera_calibration package. $ rosrun camera_calibration cameracalibrator.py --size 8x6 --square 0.108 right:=/my_stereo/right/image_raw...
View ArticleIssues with cv_bridge when using cameracalibrator.py in Indigo
After updating to Ubuntu 14.04 and Indigo I'm not able to execute the camera_calibration. With last version of opencv libraries (github repository master) python keeps looking for "cv.so". I have no...
View ArticleHow can I calibrate low resolution cameras?
I'm having great difficulties calibrating the intrinsic parameters of a low resolution monocular camera. The camera is a thermal imager with 160x120 pixels, but with a good setup (two high power lamps...
View Articleproblem in camera caliblration
HI guys I tried to calibrate my camera with ptam . but when I ran my camera's node to send image to ptam calibration and I got this err: [FATAL] [1405423151.652879650]: ASSERTION FAILED file =...
View ArticleHow to use gscam with ar_pose?
Hi, I'm new to ROS and I'm trying to use ar_pose live tracking with webcam in the laptop (using gscam). But I'm not receiving any image in rviz. This is the error I receive in the terminal [ERROR]...
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