krusion's profile - activity

Then I'll need three terminals open. One runs roscore, one runs the camera node, and one runs the calibration . What's the command to run the camera core though?

I guess I didn't then, unless you're talking about the camera node, http://wiki.ros.org/usb_cam . I only installed this and the apriltag wrapper. The only things I installed were indigo and then I followed the tutorial that I linked. Can you point me in the right direction, please. Thank you!

It's the laptop's built in cam. I couldn't find linux drivers for it. The camera works fine in the application "cheese" so i thought I didn't need drivers then.

I'm trying to follow this tutorial https://cmumrsdproject.wikispaces.com...

I get to the point where I should calibrate my build in webcam, but it won't launch the camera gui so I can start the calibration. I already ran roscore in a separate terminal. However, when I run rostopic list, I don't get camera/xxxx under list. Just rosout and rosout_agg. Why is this happening? If I ignore it and run

rosrun camera_calibration cameracalibrator.py --size 8x6 --square 0.108 image:=/camera/image_raw camera:=/camera

It'll just say service not found.

Where you able to get it working?

Yh I'm having no luck. running rostopic list for the camera calibration doesn't show me the camera topics. So calibration isn't working. And running rosnode list doesn't show me the fact that I installed the rosindigo apriltags nor usb cam. Reinstalling them says latest version already installed.

Yh I already started working on it, and found an issue. I'm going back to fix it now though. I'll update you as I go. Have you used AprilSlam yourself? If yes, then what does it output exactly? XY coordinates? I was originally looking for something where I can put predefined tag locations

Found this. https://cmumrsdproject.wikispaces.com... Was just about to try it out. But that should get the aprilslam to work, not sure how I'll deal with aprilslam though. I don't even understand the difference between the ros wrapper and the catkin. Is your tutorial more useful?

And this is almost impossible to understand, so I was hoping I'd find someone to spoon feed me enough information so I'd be able to test if this will work or not. And maybe even make it work as a whole.

I'll be honest with you. No I didn't. I actually lack a lot of linux knowledge too. The reason isn't because I'm lazy. It's because this is for my thesis project and we tried and failed with so many other localization methods, and this is our last chance. I have till tomorrow to approve or scrap it

I'm trying to setup localization with AprilSLAM and an RPi camera. But before I get into that, I want to test out the apriltags on my laptop. So I want to try the normal apriltags detection and the usb camera inside the laptop. Then after I'm done with that, I'd go onto aprilslam.

So I started out with installing ubuntu 14.04 and installed ROS indigo. I'm faced with two apriltag options.

http://wiki.ros.org/apriltags_ros

http://wiki.ros.org/apriltags

And I'm trying to connect this to them. http://wiki.ros.org/usb_cam

How do I even do that?

Well, is there a way to do it with just a camera? Our project is similar but it is outdoors. LIDAR is too expensive, and MS Kinect doesn't work with sun light. We were hoping we'd be able to use the RPi camea module. I've already looked into AprilSLAM. Haven't tried it yet.