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From Zero to Image Robotics Edition

Check out a short tutorial for a ROS-Driver for Basler Cameras to publish images from the cam. Supported are Basler cameras with USB 3.0 and GigE and also the dart cameras. It is developed by Magazino GmbH.

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A ROS-Driver for Basler Cameras

developed by Magazino GmbH, using the pylon Software Camera Suite by Basler AG, written for the ROS Wiki





This package offers many functions of the Basler-pylon API inside the ROS-Framwork.

The package supports Baslers USB 3.0, GigE as well as the DART cameras.

Images can continuously be published over /image_raw or the /image_rect topic. The latter just in case the intrinsic calibration matrices are provided through the camera_info_url parameter.

The camera-characteristic parameter such as hight, width, projection matrices and camera_frame were published over the /camera_info topic. Furthermore an action-based image grabbing with desired exposure, gain, gamma and / or brightness is provided. Hence one can grab a sequence of images with above target settings as well as a single image.

Adapting camera's settings regarding binning (in x and y direction), exposure, gain, gamma and brightness can be done using provided set_* services. These changes effect the continuous image acquisition and hence the images provided through the image topics.

The default node operates in Software-Trigger Mode. This means that the image acquisition is triggered with a certain rate and the camera is not running in the continuous mode.

The package opens either a predefined camera (using a given 'device_user_id' parameter) or, if no camera id is predefined the first camera device it can find.



The package has been tested for ROS-Indigo. For other ROS versions, please replace 'indigo' with your desired ROS-Version in the following install instructions.

The pylon_camera-pkg requires the pylonSDK to be installed on your system. In order to build the package, you need to configure rosdep (i.e. the ROS command-line tool for checking and installing system dependencies for ROS packages) such that it knows how to resolve this dependency. This can be achived by executing the following commands:


sudo sh -c 'echo "yaml"; > /etc/ros/rosdep/sources.list.d/15-plyon_camera.list'


rosdep update

Then, clone the pylon_camera-pkg, and the camera_control_msgs-pkg and install the pylon SDK in your catkin_ws:


cd ~/catkin_ws/src/ && git clone && git clone


rosdep install --from-paths . --ignore-src --rosdistro=$ROS_DISTRO -y

Build the pylon_camera package as you would build a standard ROS-package unsing p.e.


cd ~/catkin_ws && catkin_make



All parameters are listed in the default config file: config/default.yaml


Common parameters


  • The tf frame under which the images were published


  • The DeviceUserID of the camera. If empty, the first camera found in the device list will be used


  • The CameraInfo URL (Uniform Resource Locator) where the optional intrinsic camera calibration matrices are stored. This URL string will be parsed from the CameraInfoManager:

binning_x & binning_y

  • Binning factor to get downsampled images. It refers here to any camera setting which combines rectangular neighborhoods of pixels into larger "super-pixels." It reduces the resolution of the output image to (width / binning_x) x (height / binning_y). The default values binning_x = binning_y = 0 are considered the same as binning_x = binning_y = 1 (no subsampling).


  • The desired publisher frame rate if listening to the topics. This parameter can only be set once at start-up. Calling the GrabImages-Action can result in a higher frame rate.


Image Intensity Settings

The following settings do NOT have to be set. Each camera has default values which provide an automatic image adjustment resulting in valid images


  • The exposure time in microseconds to be set after opening the camera.


  • The target gain in percent of the maximal value the camera supports. For USB-Cameras, the gain is in dB, for GigE-Cameras it is given in so called 'device specific units'.


  • Gamma correction of pixel intensity. Adjusts the brightness of the pixel values output by the camera's sensor to account for a non-linearity in the human perception of brightness or of the display system (such as CRT).


  • The average intensity value of the images. It depends the exposure time as well as the gain setting. If '**exposure**' is provided, the interface will try to reach the desired brightness by only varying the gain. (What may often fail, because the range of possible exposure values is many times higher than the gain range). If '**gain**' is provided, the interface will try to reach the desired brightness by only varying the exposure time. If '**gain**' AND '**exposure**' are given, it is not possible to reach the brightness, because both are assumed to be fix.


  • Only relevant, if 'brightness' is set: The brightness_continuous flag controls the auto brightness function. If it is set to false, the brightness will only be reached once. Hence changing light conditions lead to changing brightness values. If it is set to true, the given brightness will be reached continuously, trying to adapt to changing light conditions. This is only possible for values in the possible auto range of the pylon API which is e.g. [50 - 205] for acA2500-14um and acA1920-40gm

exposure_auto & gain_auto

  • Only relevant, if 'brightness' is set: If the camera should try to reach and / or keep the brightness, hence adapting to changing light conditions, at least one of the following flags must be set. If both are set, the interface will use the profile that tries to keep the gain at minimum to reduce white noise. The exposure_auto flag indicates, that the desired brightness will be reached by adapting the exposure time. The gain_auto flag indicates, that the desired brightness will be reached by adapting the gain.


Optional and device specific parameter


  • The MTU size. Only used for GigE cameras. To prevent lost frames configure the camera has to be configured with the MTU size the network card supports. A value greater 3000 should be good (1500 for RaspberryPI)


  • The inter-package delay in ticks. Only used for GigE cameras. To prevent lost frames it should be greater 0. For most of GigE-Cameras, a value of 1000 is reasonable. For GigE-Cameras used on a RaspberryPI this value should be set to 11772.



The pylon_camera_node can be started over the launch file which includes a config file with desired parameters as frame rate or exposure time


roslaunch pylon_camera pylon_camera_node.launch


rosrun pylon_camera pylon_camera_node

Images were only published if another node connects to the image topic. The published images can be seen using the image_view node from the image_pipeline stack:


rosrun image_view image_view image:=/pylon_camera_node/image_raw



Please provide your qustions via and tag them with 'pylon_camera'

GitHub Repository


Marcel Debout
pushed ea4d9438b8351b6577dc1fd2bd29d961c21415db
2018-03-28 09:53:20 UTC
Marcel Debout
pushed 444612191f9e823c160e1b2c50a3e169493fa1f4
Bugfix for useless rectification
2018-03-28 09:20:51 UTC
Marcel Debout
pushed 1d7169eb5d1410de55a18319789a3241ea5c2407
2018-03-26 13:27:18 UTC
Marcel Debout
pushed fc5dfc2c2b9512b7f2c25d02834f299c2c545e99
Improved re-connection behavior
2018-03-26 11:42:45 UTC
Marcel Debout
pushed 7c9c0cd3bf747f2e16b55140f2cbd1446e6395bd
2018-03-06 09:28:53 UTC
Marcel Debout
pushed 9a86d9d6c959d2a12cca16df87e8a3f8279e60c0
2018-03-05 09:54:47 UTC
Marcel Debout
pushed c98ba1e05165cf978f9264dfae0a499cb6b8c9b3
Updated outdated/confusing install instructions
2018-03-05 09:52:54 UTC
Marcel Debout
pushed 0f5916fa51264677d75c33bb380c3c833416c23f
2018-03-05 09:42:51 UTC
pushed ffed58c934ed9c740ba0b93007fda7f4905eda3b
Add aarch64 architecture
2018-03-02 14:19:17 UTC
Marcel Debout
pushed 8e20743d66c88358438e2caf175bf8e4dff62da0
Removed deprectated msg-flags
2018-02-13 16:48:14 UTC
Marcel Debout
pushed 06c02ef6e0ce0bddcb6ada6d0283605b9a9853b3
2018-02-13 11:58:21 UTC
Marcel Debout
pushed 01195a79c3cbb9e7250fde918e1044d5d128c6a4
2018-02-13 11:56:07 UTC
Marcel Debout
pushed 9899e6e5fb636199ed47f9222806552039af72b5
Updated install intructions in README.rst, catkin_lint
2018-02-13 11:51:34 UTC
Marcel Debout
pushed 1f1fe51484be338e23d6b4e9152f619729eef11e
2018-02-13 09:20:36 UTC
Marcel Debout
pushed b70bf81a75a8fa27ae9c4826dd7e67a399f4a364
Installation via pylon-debian pkg
2018-02-12 15:55:58 UTC
Marcel Debout
pushed d9258dc2ab5db934e63fe933422ce424afe2b734
Added missing camera_info_manager dependency
2018-02-08 14:33:21 UTC
Marcel Debout
pushed c683a428452c8e3894bc08867c4918b10cd4a2f0
2018-01-29 08:54:39 UTC
Marcel Debout
pushed f92e857f0f29278b1bc2a2a499759acbecaf1b75
Reviewd bugfix: init() is called within action -> multiple server
2018-01-29 08:50:15 UTC
Ulrich Klank
pushed 559d9691bc584873c26eba34758efdb4912d4ef9
Create action server and data for rectification only once, delete allocated data conditionally
2018-01-25 11:57:03 UTC
Marcel Debout
pushed 8eeee9e0b3b71fe09f90e4a2e1e191354955bc63
2018-01-04 13:09:28 UTC
Markus Grimm
pushed f000bd4c385214ea8aede59b8fd7450ece755eb3
prevent double free
2017-12-22 11:35:10 UTC
Marcel Debout
pushed 26fc670823e5780bc35c4228d9a72414ff21330b
2017-11-20 08:21:54 UTC
Marcel Debout
pushed f828432dfef18186e044a1fb307a99929876a488
Bugfix: lost this because of PylonCameraNode::grabImagesRaw()
2017-11-16 10:41:25 UTC
Markus Grimm
pushed 9950249dc95b3cb978b7325840b73705aa6730a9
2017-10-13 19:32:28 UTC
Markus Grimm
pushed cc6304e9f5277acd360aa2b4078504d5cb4ba9e7
Bugfix for Pylon Find script
2017-10-13 19:28:07 UTC
Marcel Debout
pushed 8de53f63ed5b62f0181c28057040beba5c3a3404
2017-09-28 09:42:09 UTC
Marcel Debout
pushed b79f5d45c96f2f459ec9ca8a8459137ee6eb0b7c
Empty action goal now leads to undefined returned image
2017-09-28 09:39:53 UTC
Marcel Debout
pushed d15eb51c06c64b849928825020dbc117e41ada8c
Updated README
2017-09-12 09:55:41 UTC
Marcel Debout
pushed cff9b7b848732d9d1b66276d6370465c11db4265
Corrected install instructions
2017-09-11 14:27:06 UTC
Marcel Debout
pushed e2cc087ebb360c98faa20def6ffe9e2bb81476cb
2017-09-11 07:15:07 UTC


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