Source code for rastervision.core.data.label_store.object_detection_geojson_store
from typing import TYPE_CHECKING
from rastervision.core.data.label import ObjectDetectionLabels
from rastervision.core.data.label_store import LabelStore
from rastervision.core.data.label_store.utils import boxes_to_geojson
from rastervision.core.data.vector_source import GeoJSONVectorSourceConfig
from rastervision.pipeline.file_system import json_to_file
if TYPE_CHECKING:
from rastervision.core.data import ClassConfig, CRSTransformer
[docs]class ObjectDetectionGeoJSONStore(LabelStore):
"""Storage for object detection predictions."""
[docs] def __init__(self, uri: str, class_config: 'ClassConfig',
crs_transformer: 'CRSTransformer'):
"""Constructor.
Args:
uri: uri of GeoJSON file containing labels
class_config: ClassConfig used to infer class_ids from class_name
(or label) field
crs_transformer: CRSTransformer to convert from map coords in label
in GeoJSON file to pixel coords.
"""
self.uri = uri
self.crs_transformer = crs_transformer
self.class_config = class_config
[docs] def save(self, labels: ObjectDetectionLabels) -> None:
"""Save labels to URI."""
boxes = labels.get_boxes()
class_ids = [int(id) for id in labels.get_class_ids()]
scores = labels.get_scores()
geojson = boxes_to_geojson(
boxes,
class_ids,
self.crs_transformer,
self.class_config,
scores=scores)
json_to_file(geojson, self.uri)
[docs] def get_labels(self) -> ObjectDetectionLabels:
vector_source = GeoJSONVectorSourceConfig(uri=self.uri).build(
self.class_config, self.crs_transformer)
return ObjectDetectionLabels.from_geojson(vector_source.get_geojson())