samgis/prediction_api/lisa.py

from samgis import app_logger
from samgis.io.geo_helpers import get_vectorized_raster_as_geojson
from samgis.io.tms2geotiff import download_extent
from samgis.prediction_api.global_models import models_dict
from samgis.utilities.constants import DEFAULT_URL_TILES
from samgis_core.utilities.type_hints import llist_float, list_dict, dict_str_int
from lisa_on_cuda.utils import app_helpers


def lisa_predict(
        bbox: llist_float,
        prompt: str,
        zoom: float,
        inference_function_name_key: str = "lisa",
        source: str = DEFAULT_URL_TILES
) -> dict_str_int:
    """
    Return predictions as a geojson from a geo-referenced image using the given input prompt.

    1. if necessary instantiate a segment anything machine learning instance model
    2. download a geo-referenced raster image delimited by the coordinates bounding box (bbox)
    3. get a prediction image from the segment anything instance model using the input prompt
    4. get a geo-referenced geojson from the prediction image

    Args:
        bbox: coordinates bounding box
        prompt: machine learning input prompt
        zoom: Level of detail
        inference_function_name_key: machine learning model name
        source: xyz

    Returns:
        Affine transform
    """
    if models_dict[inference_function_name_key]["inference"] is None:
        app_logger.info(f"missing inference function {inference_function_name_key}, instantiating it now!")
        parsed_args = app_helpers.parse_args([])
        inference_fn = app_helpers.get_inference_model_by_args(parsed_args)
        models_dict[inference_function_name_key]["inference"] = inference_fn
    app_logger.debug(f"using a {inference_function_name_key} instance model...")
    inference_fn = models_dict[inference_function_name_key]["inference"]

    pt0, pt1 = bbox
    app_logger.info(f"tile_source: {source}: downloading geo-referenced raster with bbox {bbox}, zoom {zoom}.")
    img, transform = download_extent(w=pt1[1], s=pt1[0], e=pt0[1], n=pt0[0], zoom=zoom, source=source)

    app_logger.info(
        f"img type {type(img)} with shape/size:{img.size}, transform type: {type(transform)}, transform:{transform}.")

    _, mask, output_string = inference_fn(prompt, img)
    # app_logger.info(f"created {n_predictions} masks, preparing conversion to geojson...")
    return {
        "output_string": output_string,
        **get_vectorized_raster_as_geojson(mask, transform)
    }