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import os
from functools import lru_cache
from typing import Callable, Dict, Optional
from models.detectors.base import ObjectDetector
from models.detectors.owlv2 import Owlv2Detector
from models.detectors.yolov8 import HuggingFaceYoloV8Detector
from models.detectors.yolov8_defence import HuggingFaceYoloV8DefenceDetector
from models.detectors.yolov12_bot_sort import HuggingFaceYoloV12BotSortDetector
DEFAULT_DETECTOR = "owlv2"
_REGISTRY: Dict[str, Callable[[], ObjectDetector]] = {
"owlv2": Owlv2Detector,
"hf_yolov8": HuggingFaceYoloV8Detector,
"hf_yolov8_defence": HuggingFaceYoloV8DefenceDetector,
"hf_yolov12_bot_sort": HuggingFaceYoloV12BotSortDetector,
}
def _create_detector(name: str) -> ObjectDetector:
try:
factory = _REGISTRY[name]
except KeyError as exc:
available = ", ".join(sorted(_REGISTRY))
raise ValueError(f"Unknown detector '{name}'. Available: {available}") from exc
return factory()
@lru_cache(maxsize=None)
def _get_cached_detector(name: str) -> ObjectDetector:
return _create_detector(name)
def load_detector(name: Optional[str] = None) -> ObjectDetector:
"""Return a cached detector instance selected via arg or OBJECT_DETECTOR env."""
detector_name = name or os.getenv("OBJECT_DETECTOR", DEFAULT_DETECTOR)
return _get_cached_detector(detector_name)
# Backwards compatibility for existing callers.
def load_model():
return load_detector()
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