ar track alvar - how to detect custom IDs
Hello community!
I've got a question about tracking AR Tags with the "ar_track_alvar" package. I set up the package and subscrided to my kinect image topic. Everything runs fine. The tags, that come with the package (ID 0-20), are detected immediately and I see the corresponding TFs in rviz. So far, so good...
But now I wanted to create my own AR Tags, that carry additional information beyond a number called "ID" (e.g. the name/number of a room) to use them as landmarks. But as it turns out, the ar track alvar node seems to recognize just some of my custom AR tags. Tags that contain real text information like "Room G 301" aren't recognized at all, and even Tags that just contain a pure ID (e.g. "167") are not recognized. But in some cases (e.g. "200"), the ID is recognized.
I tried different sizes, distances, angles.... could not find a pattern. Does anyone know why the ar track alvar is so choosey in what it recognized and what not?
regards psei
Hi, I'm a beginner in ROS that I need it for my project. Is there a tutorial that explains how to 1-connect camera to ROS in order to see the frames captured. 2-Identify the AR Tags I'm looking for some code examples. I only found one that deals with CUBE/SPHERE...etc. Nothing about codes that detects AR tags. Thank you