Version: dev-latest

Calibration Guide Overview

MetriCal's calibration is a joint process, which includes calibrating intrinsics and extrinsics at the same time. This overview provides general guidelines for calibration before diving into the specific calibration guides.

General Calibration Principles

The following principles apply to all camera calibration scenarios:

Target Selection

MetriCal supports various calibration targets. Choose a target appropriate for your sensor setup and ensure its measurements are precise and specified in meters.

You'll find common calibration target combinations in our target construction guide. We recommend starting here if you just want to jump into MetriCal, since these configurations are similar to what is used in our calibration guides. We also outline how to print and build your own targets via services like UPrinting. However, if you're strapped for time, you can also purchase calibration targets directly from our online store.

If you are a company or facility that needs a more sophisticated target setup for automation or production line purposes, contact us at info@tangramvision.com.

Valid Data Formats

MetriCal takes a number of different input data types, but there are some special considerations that every user should know of. Reference the Valid Data Formats documentation for more details.

Data Quality Considerations

For all camera calibrations, regardless of how many cameras you're calibrating:

Image Focus: Always ensure targets are in focus
Field of View Coverage: Capture the target across the entire field of view
Target Orientations: When using multiple targets, rotate each one a different orientation
Convergence Angles: Vary the viewing angle to improve parameter estimation
Motion Clarity: Avoid motion blur by pausing between poses
Depth Variation: When possible, use non-planar targets or multiple targets at different depths

Sensor Calibration Guides

Good sensor calibration is key to building accurate perception systems. MetriCal helps you calibrate many types of sensors—from a single camera to complex multi-sensor setups, including local navigation systems. Our guides take you through each step of the process, from collecting data to checking your results. We cover single cameras, multiple cameras, camera-LiDAR combinations, and indoor positioning systems with clear instructions and practical tips. Full multi-modal calibrations are also possible in MetriCal. These multi-modal calibrations follow all the same guidelines as their more specialized guides.

Choose the guide below that matches your setup to get started.