ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange |
2021-09-02 17:38:01 -0500 | received badge | ● Famous Question (source) |
2021-09-02 17:38:01 -0500 | received badge | ● Notable Question (source) |
2021-09-02 17:38:01 -0500 | received badge | ● Popular Question (source) |
2021-07-12 15:16:07 -0500 | received badge | ● Famous Question (source) |
2021-05-20 11:13:07 -0500 | received badge | ● Famous Question (source) |
2021-04-21 04:16:28 -0500 | received badge | ● Notable Question (source) |
2021-04-09 01:08:13 -0500 | received badge | ● Notable Question (source) |
2020-10-14 02:32:31 -0500 | received badge | ● Famous Question (source) |
2020-10-14 02:32:31 -0500 | received badge | ● Notable Question (source) |
2020-10-14 02:32:31 -0500 | received badge | ● Popular Question (source) |
2020-10-05 18:37:33 -0500 | marked best answer | The problem about the double messages read from a rosbag file I want to write the time stamps of rosbag in a .txt document. There, I use two kinds of methods to do that:
But I meet a strange problem about the quantity of time stamps between two methods. The first method will output almost the double quantity of time stamps while that of the second one is right. The rosbag I choose is from the datase EuRoC MH_easy_01.bag. It is about the indoor UAV for vision and INS (vio) SLAM. I check the inforamtion of it and there are 3682 messages for two cameras. For the fist method, I get almost double messages (7364) and for the second one I get the same number of rosbag file. And the double number has a strange phenomenon that each message has a copy. So, it has the double number. My environment is Ubuntu 16.05 and ROS Kinetic. Two method codes are in the following: The first one of C++ API And the second one of callback function (more) |
2020-10-05 18:37:23 -0500 | received badge | ● Famous Question (source) |
2020-08-12 22:31:43 -0500 | received badge | ● Notable Question (source) |
2020-08-08 19:16:30 -0500 | received badge | ● Famous Question (source) |
2020-08-07 05:01:15 -0500 | received badge | ● Popular Question (source) |
2020-07-24 04:42:38 -0500 | received badge | ● Famous Question (source) |
2020-04-06 22:18:46 -0500 | received badge | ● Famous Question (source) |
2020-04-06 22:18:46 -0500 | received badge | ● Notable Question (source) |
2020-04-06 22:18:46 -0500 | received badge | ● Popular Question (source) |
2020-03-12 05:43:48 -0500 | received badge | ● Notable Question (source) |
2020-03-12 04:14:15 -0500 | edited question | can not compile by catkin_make but catkin build can not compile by catkin_make but catkin build Hi, everyone. My environment is Ubuntu 16.04 and ROS Kinetic. I meet a |
2020-03-12 04:13:36 -0500 | edited question | can not compile by catkin_make but catkin build can not compile by catkin_make but catkin build Hi, everyone. My environment is Ubuntu 16.04 and ROS Kinetic. I meet a |
2020-03-12 03:20:15 -0500 | edited question | can not compile by catkin_make but catkin build A catkin_make question about src/package.xml does not exist. Hi, everyone. My environment is Ubuntu 16.04 and ROS Kineti |
2020-03-08 23:55:27 -0500 | received badge | ● Popular Question (source) |
2020-03-04 21:17:59 -0500 | marked best answer | An incomprehension about geometry_msgs/PoseWithCovariance Message Hi, I have a question about pose covariance. In the doc website (link text), I see the covariance is shown as a matrix with 6*6 size and the parameters are x, y, z, rotation about X axis, rotation about Y axis, rotation about Z axis in order. I am confused about the size and the parameters. The x,y,z are the coordinate of a 3D point and they are 3 parameters? And then, three rotations are shown in 33 matrix respectively? If it is, the all parameters are 3 + 39 = 30. Why 6*6 here? Thank you! |
2020-03-04 00:44:18 -0500 | edited question | can not compile by catkin_make but catkin build A catkin_make question about src/package.xml does not exist. Hi, everyone. My environment is Ubuntu 16.04 and ROS Kineti |
2020-03-03 23:41:25 -0500 | commented answer | An incomprehension about geometry_msgs/PoseWithCovariance Message Ok, I got it. Thanks you! |
2020-03-03 21:40:54 -0500 | edited question | can not compile by catkin_make but catkin build A catkin_make question about more than one package Hi, everyone. My environment is Ubuntu 16.04 and ROS Kinetic. I meet |
2020-03-03 21:40:52 -0500 | edited question | can not compile by catkin_make but catkin build A catkin_make question about more than one package Hi, everyone. My environment is Ubuntu 16.04 and ROS Kinetic. I meet |
2020-03-03 21:34:03 -0500 | edited question | can not compile by catkin_make but catkin build A catkin_make question about more than one package Hi, everyone. My environment is Ubuntu 16.04 and ROS Kinetic. I meet |
2020-03-03 21:33:30 -0500 | asked a question | can not compile by catkin_make but catkin build A catkin_make question about more than one package Hi, everyone. My environment is Ubuntu 16.04 and ROS Kinetic. I meet |
2020-03-01 19:28:46 -0500 | commented answer | An incomprehension about geometry_msgs/PoseWithCovariance Message Thanks for your answer. By the way, I guess that the TwistWithCovariance is about the linear velocity of xyz and the rot |
2020-02-26 06:59:49 -0500 | asked a question | An incomprehension about geometry_msgs/PoseWithCovariance Message An incomprehension about geometry_msgs/PoseWithCovariance Message Hi, I have a question about pose covariance. In the |
2019-12-08 21:12:34 -0500 | received badge | ● Popular Question (source) |
2019-12-06 03:06:18 -0500 | asked a question | Difference between OpenCV installed by ROS and that from OpenCV itself Difference between OpenCV installed by ROS and that from OpenCV itself Hi, I am a newer in SLAM. I offen use the OpenCV |
2019-10-15 02:52:31 -0500 | commented answer | How to change the camera model when using image_pipeline? Thanks for your help! Thank you! |
2019-10-14 20:09:58 -0500 | received badge | ● Popular Question (source) |
2019-10-12 03:02:18 -0500 | asked a question | How to evaluate the calibration results from image_pipeline? How to evaluate the calibration results from image_pipeline? Hi, I have successfully done the binocular calibration with |
2019-10-11 22:07:18 -0500 | commented answer | How to change the camera model when using image_pipeline? Thank you! I have got the baseline. For the camera model, I have another question that dose image_pipeline only support |
2019-10-11 20:50:08 -0500 | marked best answer | How to change the camera model when using image_pipeline? Hi, I do some binocular camera calibration tests with image_pipeline. For some reasons, I can not see the video in the image_pipeline/Tutorials page. I have to ask questions there. 1, How can I cange the camera model? You know that diferent cameras should choose the appropriate one. Further, I want to know all the models that image_pipeline supports. 2, How can I get the baseline after I do the calibration? I just get 3 files: left.yaml, right.yaml and ost.txt. I don't see the extrinsic parameters, which I mean a matrix to show transformation relationship between double cameras. Is there some commend to add it into the outputs? Thank you! |
2019-10-11 06:37:14 -0500 | asked a question | How to change the camera model when using image_pipeline? How to change the camera model when using image_pipeline? Hi, I do some binocular camera calibration tests with image_pi |
2019-10-11 06:36:13 -0500 | asked a question | How to change the camera model when using image_pipeline? How to change the camera model when using image_pipeline? Hi, I do some binocular camera calibration tests with image_pi |
2019-10-01 10:01:19 -0500 | received badge | ● Notable Question (source) |
2019-09-24 08:03:45 -0500 | received badge | ● Famous Question (source) |
2019-09-21 11:04:52 -0500 | received badge | ● Notable Question (source) |
2019-08-28 02:25:01 -0500 | received badge | ● Notable Question (source) |