ROS drivers for the ximea xiQ USB 3.0 Cameras
- Maintainer status: maintained
- Maintainer: Abdelhamid El-Bably <ahelbably AT uwaterloo DOT ca>
- Author: Abdelhamid El-Bably, Arun Das, Michael Tribou
- License: BSD
- Bug / feature tracker: https://github.com/wavelab/ximea_camera/issues
- Source: git https://github.com/wavelab/ximea_camera.git (branch: devel-indigo)
This software provides ROS drivers for the ximea xiQ USB 3.0 Cameras. This driver supports image acquisition from an arbitrary number of cameras, so long as there is sufficient bandwidth on the USB 3.0 bus to perform the data transfer. In order to operate the cameras, the serial numbers of the devices must be known.
This software requires the Ximea Linux Software Package. See http://www.ximea.com/support/wiki/apis/XIMEA_Linux_Software_Package for details.
1) Create a configuration file for each camera. The configuration file should be kept in the /config folder. A configuration file will look as follows:
serial_no: 32301951 cam_name: "camera1" yaml_url: "package://mcptam/calibrations/camera1.yaml" exposure_time: 30000 rect_left: 200 rect_top: 200 rect_height: 600 rect_width: 900 image_data_format: "XI_MONO8"
serial_no refers to the serial number of the camera
cam_name is the name you wish to give to the camera
yaml_url is the location of the calibration information file, which is used by the camera info manager to publish the calibration parameters
exposure_time refers to the image exposure time in microseconds
rect_left, rect_top, rect_height, rect_width are used to set the image region of interest (ROI). See the Ximea xiQ API for more information http://www.ximea.com/support/wiki/apis/XiAPI_Manual.
image_data_format sets the data format for the image. Currently, formats XI_MONO16, XI_RGB24, XI_RGB32, XI_RAW8, XI_RAW16, and XI_MONO8 are supported
2) Create a launch file for your camera configuration. A typical launch file will look as follows:
1 <launch> 2 <!-- Camera Node --> 3 <node name="ximea" pkg="ximea_camera" type="ximea_camera_node" output="screen" > 4 <param name="frame_rate" type="int" value="60" /> 5 6 <rosparam param="camera_param_file_paths" subst_value="true">[$(find ximea_camera)/config/ximea1.yaml, $(find ximea_camera)/config/ximea2.yaml]</rosparam> 7 8 </node> 9 </launch>
The main parameters of interest are the frame rate and the file paths.
frame_rate corresponds to the frame rate for all of the cameras in the group.
camera_param_file_paths is a list of file names corresponding to the configuration files made for each camera in step 1. For a single camera setup, the camera_param_file_paths parameter would look something like:
1 <rosparam param="camera_param_file_paths" subst_value="true"> [$(find ximea_camera)/config/ximea1.yaml] </rosparam>
while a three camera setup would have a list containing the file names for the configuration files of all three cameras, separated by commas:
1 <rosparam param="camera_param_file_paths" subst_value="true">[$(find ximea_camera)/config/ximea1.yaml, $(find ximea_camera)/config/ximea2.yaml, $(find ximea_camera)/config/ximea3.yaml]</rosparam>
3) You should now be able to plug in the cameras and launch the file created in step 2.
Each set of published topics will be under the namespace corresponding to the camera name. Each camera will publish:
/camera_info, which is of ROS message type sensor_msgs/CameraInfo. This message carries all of the camera specific calibration information.
/image_raw/, which of of ROS message type sensor_msgs/Image. This message carries the image data.