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41 lines
1.5 KiB
Python
41 lines
1.5 KiB
Python
from typing import Any
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import numpy as np
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from insightface.model_zoo import RetinaFace
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from numpy.typing import NDArray
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from app.models.base import InferenceModel
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from app.models.transforms import decode_cv2
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from app.schemas import FaceDetectionOutput, ModelSession, ModelTask, ModelType
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class FaceDetector(InferenceModel):
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depends = []
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identity = (ModelType.DETECTION, ModelTask.FACIAL_RECOGNITION)
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def __init__(self, model_name: str, min_score: float = 0.7, **model_kwargs: Any) -> None:
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self.min_score = model_kwargs.pop("minScore", min_score)
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super().__init__(model_name, **model_kwargs)
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def _load(self) -> ModelSession:
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session = self._make_session(self.model_path)
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self.model = RetinaFace(session=session)
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self.model.prepare(ctx_id=0, det_thresh=self.min_score, input_size=(640, 640))
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return session
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def _predict(self, inputs: NDArray[np.uint8] | bytes, **kwargs: Any) -> FaceDetectionOutput:
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inputs = decode_cv2(inputs)
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bboxes, landmarks = self._detect(inputs)
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return {
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"boxes": bboxes[:, :4].round(),
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"scores": bboxes[:, 4],
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"landmarks": landmarks,
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}
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def _detect(self, inputs: NDArray[np.uint8] | bytes) -> tuple[NDArray[np.float32], NDArray[np.float32]]:
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return self.model.detect(inputs) # type: ignore
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def configure(self, **kwargs: Any) -> None:
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self.model.det_thresh = kwargs.pop("minScore", self.model.det_thresh)
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