Skip to main content
Version: 8.0

Releases + Changelogs

Version 8.0.1​

Release Page

MetriCal Sensor Calibration Utilities repository for v8.0.1: https://gitlab.com/tangram-vision/platform/metrical/-/releases/v8.0.1

Overview​

This version fixes a small bug found in pipeline license validation.

Changelog​

Fixed​

  • null license values in a pipeline configuration are discarded, not interpreted as a provided license key.

Version 8.0.0​

Release Page

MetriCal Sensor Calibration Utilities repository for v8.0.0: https://gitlab.com/tangram-vision/platform/metrical/-/releases/v8.0.0

Overview​

This release brings a ton of new features to the MetriCal CLI, most of them focused on improving the user experience. The biggest difference is one you won't see: all of the math done during optimization is now fully sparse, which means it takes a lot less memory to run a calibration. And smart convergence criteria means that calibrations are faster, too!

We've also added a new mode, pipeline, which allows you to run a series of commands in serial. Find out more about it in the Pipeline Mode section of the documentation.

Changelog​

Added​

  • Pipeline mode. This executes a series of Commands in serial, as they're written in a pipeline JSON file.
  • Render the optimized plex at the end of a calibration.
  • The subplex ID for a spatial constraint now shows up in the Extrinsics table.
  • Input JSON files with comments are now accepted as valid.

Changed​

  • All calibrations now undergo outlier detection and reweighting as part of the BA process. Outliers are detected for cameras, lidar, and relative extrinsics.
  • Summary table is sorted by component name, not by UUID.
  • Summary statistics in console are now computed using a weighted RMSE.
  • The bundle adjustment is now a fully sparse operation, relieving memory pressure on larger datasets.

Fixed​

  • The height of the sync group chart now adjusts with the number of components present in the dataset.
  • Bug in Init mode when using a RealSense435Imu preset.
  • All stereo pairs are now derived and graphed in console output

Removed​

  • The --metrics-with-outliers flag and the --outlier-filter flag have been removed.

Version 7.0.1​

Release Page

MetriCal Sensor Calibration Utilities for v7.0.1: https://gitlab.com/tangram-vision/platform/metrical/-/releases/v7.0.1

Overview​

This patch release fixes various errata found in the v7.0.0 release.

Changelog​

Fixed​

  • Rendering the correction at the end of a calibration actually uses the corrected plex (rather than the input plex).
  • The extrinsics table now only shows delta values if an input plex is provided.
  • Camera-lidar extrinsics rendering in Rerun now takes the spatial constraint with the minimum covariance. This is different from the previous behavior where all spatial constraints were rendered, regardless of quality.

Version 7.0.0​

Release Page

MetriCal Sensor Calibration Utilities for v7.0.0: https://gitlab.com/tangram-vision/platform/metrical/-/releases/v7.0.0

Overview​

Welcome, v7.0.0! Yes, merely a week after v6.0.0, we bump major versions. Classic.

Revised Documentation​

It's finally here! The revised Tangram Vision documentation site is live: https://docs.tangramvision.com/.

This documentation site holds readmes and tutorials on all of Tangram Vision's products. The MetriCal section is fully-featured, and based on this release: https://docs.tangramvision.com/metrical/metrical/. We will be maintaining all documentation for this and newer versions on the official docs site from here on out.

LiDAR-LiDAR Calibration​

MetriCal now supports LiDAR-LiDAR calibration, no cameras needed. Users will need a circular markerboard to calibrate LiDAR.

New Modes - pretty-print and evaluate​

v7.0.0 introduces two new modes:

The Calibrate mode, by extension, no longer has an --evaluate flag. This is just Evaluate mode.

Revamped Rendering options + Deprecated Review mode​

Review mode is no longer! Instead, passing the --render flag to either Calibrate or Evaluate mode will render the corrected calibration at the end of the run. Also, --render and --render-socket options are no longer global. Instead, they are only applicable for Calibrate and Evaluate modes.

Changelog​

Added​

  • Support for calibrating multi-LiDAR, no-camera datasets. This still leverages MetriCal's circle target, but no longer requires a camera or any image topics to be present in order to calibrate.
  • Pretty Print mode for printing out a plex in a human readable format.
  • Evaluate mode to evaluate the quality of a calibration on a test dataset. This is a reinterpretation of the --evaluate flag that was in the Calibrate mode; it's just been given its own command for ease of use.
  • A verbose flag to the shape mode to print the plex that has been created from the command.
  • Additional descriptions to errors that can be generated by calling the calibrate mode.

Changed​

  • Calibrate + Evaluate mode now renders its own corrections (rather than punting that capability to review).
  • The --render flag at the global level has been moved to the Calibrate & Evaluate modes.

Removed​

  • Review mode and README mode have been removed completely. Review mode's previous functionality is now split between Pretty Print mode and Calibrate mode.
  • The --evaluate flag in Calibrate mode.

Fixed​

  • Summary statistics tables now have the correct units displayed alongside their quantities.
  • Printing the results of a plex with no extrinsics will now print an empty table, rather than nothing at all.
  • Nominal extrinsics deltas in tables are now represented by the string "--".

Errata​

  • The "corrected" rendering at the end of a calibration run mistakenly uses the input plex, not the output plex. Scheduled fix: v7.0.1.
  • The output extrinsics table does not correctly calculate the delta between the input and output plex. Scheduled fix: v7.0.1.
  • Rendering the corrected camera-lidar registration would take the first spatial constraints available, rather than taking the constraint with the minimum covariance. This often makes calibrations appear wildly incorrect, despite a good calibration. Scheduled fix: v7.0.1.