delta785's profile - activity

Mark the answer as correct, please. :)

and then you can run your program with rosrun mynode mynode te.jpg, and THEN you can add args in your launch file. Hardcoding thingies isn't good

Probably somehow it could be done. But you'd better use arguments, it will make your application more flexible.You do it by typing, for example, string name; name = argv[1] and then using it in imread (maybe with some easy data conversion from string to char *).

Anyway it's strange that locating your jpeg file in exe directory doesnt work. Do you put it in devel/lib/package_name/ folder?

Try if this works - imread("/home/username/te.jpg"); and put the jpg file in your user folder. For test its fine, but you shouldnt do it often :P

So it's inside the code itself? I don't remember precisely, try placing the image either in the executable folder or launch file folder. With no need in using any args in launch file. You can also pass the image path as an argument - this way you wont need to copy your jpg.

You need to use args in your node call in launch file.

<node pkg="rospy_demo" type="listener" args="$(find mypkg)/resources/test.jpg" />. (just random example from google)

For just running the program (with rosrun, for example) put the absolute path to the file - here it will be imread("/home/username/img.jpg") or put the image in the executable folder - it should be devel/lib/package_name/

Ding dong! Correct answer. Many thanks!

I stumbled upon a difficulty, when trying to work with uEye camera. I've added include "ueye.h"

to work with code:

HIDS hCam = 1;

INT nRet = is_InitCamera (&hCam, NULL);

Yet this is the output when I try to do catkin_make using my CMakeLists ( http://pastebin.com/u8f4t2Fc )

CMakeFiles/ros_aruco.dir/src/ros_aruco.cpp.o: In function `main':
ros_aruco.cpp:(.text+0x578): undefined reference to `is_InitCamera'
collect2: ld returned 1 exit status

What should I add to make it work?

Hello,

I'm trying to run a node from rosrun (it works when I manually enter ./program inside build directory). Yet it doesn't work when called by rosrun - it finds the directory by tab completion, but not the executable. How can I help it? I need it to use it in launch files.

[rosrun] Found the following, but they're either not files,
[rosrun] or not executable:
[rosrun]   /home/user/ros_ws/catkin_ws/src/ros_programme

Aaand that's it! Many thanks. You're the only one who was interested in my problem for more than 5s. :D

Sorry, i wrote only the directory. The output of find function is: ./src/ros_aruco ./build/ros_aruco ./build/ros_aruco/ros_aruco

A directory. So I normally run my node by typing cd build/ros_aruco and then ./ros_aruco

catkin_ws/build/ros_aruco

So did you use rosws init and then rosws set? As described here: http://wiki.ros.org/ROS/Tutorials/InstallingandConfiguringROSEnvironment

Aaaand that solved the problem. Many thanks!

http://pastebin.com/rRKEQCXp

Ubuntu 12.04

And the output after sudo apt-get install libyam TAB TAB libyaml-0-2 libyaml-dev libyaml-shell-perl libyaml-0-2-dbg libyaml-libyaml-perl libyaml-syck-perl libyaml-appconfig-perl libyaml-perl libyaml-tiny-perl

output: E: Unable to locate package libyaml-cpp-dev

I don't have any libyaml-cpp libraries avalaible there.Only some libyaml libraries. I tried installing libyaml-dev but it didn't help.Any suggestions?

You mean source devel/setup.bash in my catkin_ws? That's the first thing I do, always. I think I should add it to bashrc. :P Anyway, my ugly line of code is the only thing so far that allows me to run my node from rosrun.

I ran across a problem, probably because I deleted one day some files related to libyaml. Anyway when I try to build gscam (ros package) I get this error.

/usr/bin/ld: warning: libyaml-cpp.so.0.2, needed by /opt/ros/hydro/lib/libcamera_calibration_parsers.so, not found (try using -rpath or -rpath-link)
/opt/ros/hydro/lib/libcamera_calibration_parsers.so: undefined reference to `YAML::Node::begin() const'

And I can't find where I could get it. I mean, I've downloaded 0.3 version from code google yaml-cpp and it works for my purposes. Any help?

I'm open to any new suggestions that works AND will place the exe in the devel directory. So far I couldn't find any.

Check

rosparam get use_sim_time

and then you may try

rosparam set use_sim_time false

You may have activated it, yet didn't create any clock source

The correct answer to this problem is to add

set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)

at the beginning of CMakeLists.txt.

Hello, All of a sudden, I need to change my approach from calling TheVideoCapturer.open(0); (TheVideoCapturer is of a class VideoCapture) to open my internet camera (id 0) to subscribing to published image_raw topic. What are the easiest steps here? I'd like to use my TheVideoCapturer object still, because changing everything would be really troublesome.