Commit 808794ea authored by Nicolas Cadart's avatar Nicolas Cadart
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[version] Update changelog with v1.4 changes

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# SLAM changes history
## *v1.4 (2021/04/01)*
This release brings important changes in code architecture (change SLAM point definition, add namespaces, reorganize ROS wrapping),
and adds new LiDAR sensors support (Velodyne and Ouster on PV, Velodyne and RoboSense on ROS).
It also focuses on improved performance and eases user experience.
Major changes are sumarized below.
### Core lib
**Major new features:**
* Change SLAM point definition to add more point-wise fields (!64 and !65)
* Use real point wise time and compute output pose at frame timestamp (!82)
* Add multi lidar support, currently only available from ROS wrapping (!83 and !84)
**Refactoring and code architecture changes:**
* Standardize convention for pose formatting to XYZRPY (!66)
* Add `LidarSlam` and `Utils` namespaces and reorganize code structure (!72 and !73)
* Laser ID mapping arg becomes optional (!77)
* Move laser ID mapping parameter to wrappings (!79)
* Add `Utilities.cxx` to avoid defining entire helpers functions in header (!74 and !89)
* SLAM steps refactoring (!81)
* Major undistortion refactoring, remove `OPTIMIZED` mode and split `APPROXIMATED` to `ONCE` and `REFINED` (!87)
**Performance improvements:**
* Accelerate PCA computation and use float precision in keypoints extraction and registration (!86)
* Accelerate x3 linear transform interpolation (!88)
* Improve residuals weighting: fix duplicated weighting, use TukeyLoss robustifier, add debug info (!90)
* Simplify auto diff ceres (!95)
**Bug fixes:**
* Correct nb of laser rings detection (!70)
* Fix Ceres residuals conflict with LV's and deprecate unused residuals (!71)
* Fix ICP saturation range (!94)
### ROS wrapping
The ROS wrapping is adapted to the core lib improvements, such as the SLAM point definition, the optional laser ID mapping setting and other modified parameters and options.
It also now supports the multi-lidar mode to SLAM with several LiDAR devices.
- Update ROS wrapping to use ROS Velodyne driver 1.6 (!67)
- Allow inheritance from LidarSlamNode (!69)
- Add independent `lidar_conversions` package to perform pointclouds conversion to the expected SLAM point type (!68 and !75)
- Add Robosense RSLidar conversion node, and improve approximate point-wise timestamp computation (!76)
- Set point-wise `device_id` field in lidar_conversions nodes (!80)
- Update ROS params, doc and rename output frame topic (!85)
### ParaView wrapping
The PV wrapping is adapted to the core lib improvements, such as the SLAM point definition, the optional laser ID mapping setting and other modified parameters and options.
- Adapt PV wrapping to Ouster, and add manual setting for other LiDAR data (!56)
## *v1.3 (2020/11/20)*
This release brings various minor fixes or features to improve stability, performance or code readibility.
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