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Couldn't find executable named

asked 2018-12-13 03:04:31 -0500

venushka gravatar image

I am new to ros and its developing. By following this link . i try calibrate uvc camera. Upto Installation of calibration related packages is done. But when i try to run

rosrun camera_calibration --size 8x6 --square 0.025 image: = / image_raw

i get following errors . Any help is appreciated. Thank you in advance.

rosrun camera_calibration --size 8x6 --square 0.025 image: = / image_raw
[rosrun] Couldn't find executable named below /opt/ros/kinetic/share/camera_calibration
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I think you should try to get the dependencies and compiling the drivers as mentioned in this tutorial first. and also try $ rosmake camera_calibration before running the camera calibration node

Rasika gravatar image Rasika  ( 2018-12-13 05:34:31 -0500 )edit

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answered 2018-12-13 10:54:47 -0500

It seems the page you referring to has a typo. The node is actually called Also you added spaces in the ROS parameter assignment and the topic namespace, so pay attention.

The command should be:

rosrun camera_calibration --size 8x6 --square 0.025 image:=/image_raw

The easiest way to avoid such problems is to type in everything yourself (do not copy/paste) and use bash-completion by pressing Tab. ROS command-line tools have pretty good completion support for most of parameters. In case of rosrun the completion is very helpful for package names (first parameter) and node names (second parameter); note, however, to make this to work for your own nodes the script should be actually marked as executable on the file system with, e.g. chmod a+x <script name>

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@Boris thank you after running it i got this problem , do you have any idea the usb camera that i use i tested with cheese command. it works well.

venushka gravatar image venushka  ( 2018-12-14 03:35:06 -0500 )edit

From a quick glance the command used on the link you've provided is also wrong: again there are spaces where they shouldn't be. Make sure that parameter assignment has no spaces, i.e. exactly like this image:=/image_raw. Also make sure that the topic exists with rostopic info /image_raw

Boris gravatar image Boris  ( 2018-12-14 04:14:00 -0500 )edit

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Asked: 2018-12-13 02:42:26 -0500

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Last updated: Dec 13 '18