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Apriltags Code for the 2023 First Robotics Competition. Detects April Tags for pose estimation and goal identification.

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FRC3476/AprilTags-2023

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AprilTags-2023

AprilTags code used on the 2023 Code Orange robot Baja.

Features

  • Apriltags Detection and Pose Estimation
  • Tag Filtering for Few False Positives
  • Wide Array of Camera Support
  • Live-Updatable Configurations
  • FFMPEG Video Streaming
  • Recording Video to Flash Drive
  • Live Video Tag Annotation
  • Comprehensive Error Handling and Logging

Environment Details

  • Tested to run on Ubuntu on a Beelink Mini PC
  • Tested to run using a Realsense R445 Depth Camera and several generic webcams
  • Flash drive should be used if video recording is desired. It will write to the first drive alphabetically sorted in the /media/{USERNAME}/ directory
  • Program is expected to be run in the /var/www/AprilTags/AprilTags-2023 directory
  • /var/www/AprilTags/logs file should exist in order for logs to be stored
  • /var/www/AprilTags/ip.txt file should exist with the static IPV4 device ip stored inside if streaming is desired
  • This program acts as a NetworkTables client that connects to a NetworkTables server running on an NI RoboRIO, so the proper roboRIO ip should be set in constants.py
  • Program will send tag translation and orientation relative to the camera as key: tag_id, value: [x, y, z, x, y, z, w, latency] where indicies 3, 4, 5, and 6 represent a quaternion
  • In normal use, program is to launch automatically on boot through a linux crontab and will automatically relaunch if an unhandled crash occurs using a bash script
  • It is recommended that the device running the program boots on receiving power, has a static ip set, and has wifi disabled
  • All external libraries must be installed independently

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Apriltags Code for the 2023 First Robotics Competition. Detects April Tags for pose estimation and goal identification.

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