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Camera Calibration Handbook

A spectre is is haunting robotics - the spectre of calibration.

In this repository, we're gonna focus on

Overview

Drive Link

Intrinsics

Note: stock intrinsics on the Kinect are OK - not great, not terrible. However, slight inaccuracies in the calibration cause issues, in particular color bleeding and non-planar surfaces...

Known issue: depth-to-rgb

Check k4aviewer

RGB Camera

IR Camera

Validating Intrinsics

Extrinsics

Manual

Independent Calibration

Calibration adjustment

easy_handeye

moveit_calibration

TODO: not really supported...

Polymetis

Kalibr

Idealized Joint Calibration Setup...

Validating Extrinsics

Single Camera

Multi-Camera

Possible future options:

  • Perform calibration from rgb_to_depth. The justification here is that if we calibrate to the depth camera's frame, then the error profile will be better aligned with our downstream output (good point clouds). However, it's a bit spotty visually, so apriltags may not be visualized properly.

https://calib.io/blogs/knowledge-base/camera-models

https://rosindustrial.org/3d-camera-survey