Multiview species classification experiments

This repo contains the code to run the experiments reported in "Classifying geospatial objects from multiview aerial imagery using semantic meshes", available on ArXiv.

Instalation

This repository primarily contains scripts to run experiments and does not implement the core functionality. Instead, several independent repositories need to be installed.

Geograypher

This library determines the correspondences between individual images, meshes, and 2D geospatial data.

MMSegmentation (fork)

MMSegmentation is a framework for semantic segmentation. The fork provides a few additional dataset definitions and improved inference flexibility.

segmentation_utils

This handles visualization and pre-processing of semantic segementation datasets.

The data for this project is hosted on Box and can be accessed through the Open Science Framework reference. This contains both input and intermediate data. The data should be downloaded into the data folder of this repository.

Modifying `code/classification/constants.py`

There are several constants that you need to set based on how you install the above libraries. The first two, SEGMENTATION_UTILS_PYTHON and MMSEG_PYTHONG should be set to the location of the Python interpreter corresponding to the conda environments created in the earlier sections. This is used for subprocess calls because it is challenging to install all the dependencies all in one environment. The next two, SEGMENTATION_UTILS_FOLDER and MMSEGMENTATION_FOLDER, correspond to the folders where those projects were installed. Scripts within these folder will be called by the subprocess.

Data structure

The data in this project is taken from four sites, Chips, Delta, Lassic, and Valley.

.
├── field_ref # Data collected from field surveys
│   │         # and combined with geometric tree detection
│   ├── crown_labels.gpkg
│   ├── crown_labels.gpkg
│   └── unlabeled_full_site_crowns
│       ├── chips.gpkg
│       ├── delta.gpkg
│       ├── lassic.gpkg
│       └── valley.gpkg
├── models # Trained segmentation models
│   └── multi_site
│       ├── MV-HN_chips_delta_lassic
│       ├── MV-LO_chips_delta_lassic
│       ├── ...
│       └── ortho_chips_delta_lassic
└── per_site_processing # Data from each site
    ├── chips
    │   ├── 01_images # The input images
    │   ├── 02_photogrammetry # Photogrammetry (geometric) products
    │   ├── 03_training_data # Formatted training data
    │   ├── 04_model_predictions # Segmentation predictions
    │   └── 05_processed_predictions # Geospatial predictions
    ├── delta
    ├── lassic
    └── valley

Scripts

01_MV_render_labels.py Render labels corresponding each image

01_ortho_create_training_chips.py Create chips from the orthomosaic and create corresponding labels.

02_train_models.py Preprocess the data and train the models

03_predict_models.py Generate predictions from the models and unlabeled data

04_MV_aggregate_predictions.py Aggregate the image-based predictions onto the mesh and then export into geospatial predictions

04_ortho_aggregate.py Aggregate the per-chip orthomosaic predictions into a single orthomosaic

05_compute_accuracy.py Compute the accuracy of the different predictions versus the groundtruth

open-forest-observatory/multiview-tree-species-classification-experiments