Update README.md
Browse files
README.md
CHANGED
|
@@ -64,22 +64,14 @@ model-index:
|
|
| 64 |
---
|
| 65 |
|
| 66 |
## Uses
|
| 67 |
-
The model was specifically trained and designed for the segmentation of aerial lidar point clouds from the Lidar HD program (2020-2025)
|
| 68 |
-
an ambitious initiative that aim to obtain a 3D description of the French territory by 2026.
|
| 69 |
-
While the model could be applied to other types of point clouds, Lidar HD data have specific geometric specifications. Furthermore, the training data was colorized
|
| 70 |
-
with very-high-definition aerial images from the ([BD ORTHO®](https://geoservices.ign.fr/bdortho)), which have their own spatial and radiometric specifications.
|
| 71 |
-
|
| 72 |
-
Consequently, the model's prediction would improve for aerial lidar point clouds with similar densities and colorimetries than the original ones.
|
| 73 |
|
| 74 |
**_Data preprocessing_**: Point clouds were preprocessed for training with point subsampling, filtering of artefacts points, on-the-fly creation of colorimetric features, and normalization of features and coordinates.
|
| 75 |
For inference, the same preprocessing should be used (refer to the inference configuration and to the code repository).
|
| 76 |
|
| 77 |
-
**_Inference library: Myria3D_**: Model was trained in an open source deep learning code reposiroty developped in-house, and inference is only supported in this library.
|
| 78 |
-
Myria3D comes with a Dockerfile as well as detailed documentation for inference.
|
| 79 |
-
Patched inference from large point clouds (e.g. 1 x 1 km Lidar HD tiles) is supported, with or without (by default) overlapping sliding windows.
|
| 80 |
-
The original point cloud is augmented with several dimensions: a PredictedClassification dimension, an entropy dimension, and (optionnaly) class probability dimensions (e.g. building, ground...).
|
| 81 |
-
Refer to Myria3D's documentation for custom settings.
|
| 82 |
-
|
| 83 |
**_Multi-domain model_**: The FRACTAL dataset used for training covers 5 spatial domains from 5 southern regions of metropolitan France.
|
| 84 |
The 250 km² of data in FRACTAL were sampled from an original 17440 km² area, and cover a wide diversity of landscapes and scenes.
|
| 85 |
While large and diverse, this data only covers a fraction of the French territory, and the model should be used with adequate verifications when applied to new domains.
|
|
@@ -93,9 +85,11 @@ the aerial lidar point clouds are expected to have more consistent characteristi
|
|
| 93 |
|
| 94 |
## How to Get Started with the Model
|
| 95 |
|
| 96 |
-
|
| 97 |
-
|
| 98 |
-
|
|
|
|
|
|
|
| 99 |
|
| 100 |
---
|
| 101 |
|
|
|
|
| 64 |
---
|
| 65 |
|
| 66 |
## Uses
|
| 67 |
+
The model was specifically trained and designed for the **semantic segmentation of aerial lidar point clouds from the Lidar HD program (2020-2025)**.
|
| 68 |
+
The Lidar HD is an ambitious initiative that aim to obtain a 3D description of the French territory by 2026.
|
| 69 |
+
While the model could be applied to other types of point clouds, [Lidar HD](https://geoservices.ign.fr/lidarhd) data have specific geometric specifications. Furthermore, the training data was colorized
|
| 70 |
+
with very-high-definition aerial images from the ([BD ORTHO®](https://geoservices.ign.fr/bdortho)), which have their own spatial and radiometric specifications. Consequently, the model's prediction would improve for aerial lidar point clouds with similar densities and colorimetries than the original ones.
|
|
|
|
|
|
|
| 71 |
|
| 72 |
**_Data preprocessing_**: Point clouds were preprocessed for training with point subsampling, filtering of artefacts points, on-the-fly creation of colorimetric features, and normalization of features and coordinates.
|
| 73 |
For inference, the same preprocessing should be used (refer to the inference configuration and to the code repository).
|
| 74 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 75 |
**_Multi-domain model_**: The FRACTAL dataset used for training covers 5 spatial domains from 5 southern regions of metropolitan France.
|
| 76 |
The 250 km² of data in FRACTAL were sampled from an original 17440 km² area, and cover a wide diversity of landscapes and scenes.
|
| 77 |
While large and diverse, this data only covers a fraction of the French territory, and the model should be used with adequate verifications when applied to new domains.
|
|
|
|
| 85 |
|
| 86 |
## How to Get Started with the Model
|
| 87 |
|
| 88 |
+
Model was trained in an open source deep learning code repository developped in-house: [github.com/IGNF/myria3d](https://github.com/IGNF/myria3d)).
|
| 89 |
+
Inference is only supported in this library, and inference instructions are detailed in the code repository documentation.
|
| 90 |
+
Patched inference from large point clouds (e.g. 1 x 1 km Lidar HD tiles) is supported, with or without (by default) overlapping sliding windows.
|
| 91 |
+
The original point cloud is augmented with several dimensions: a PredictedClassification dimension, an entropy dimension, and (optionnaly) class probability dimensions (e.g. building, ground...).
|
| 92 |
+
For convenience and scalable model deployment, Myria3D comes with a Dockerfile.
|
| 93 |
|
| 94 |
---
|
| 95 |
|