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import torch
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import torchvision.transforms as T
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import numpy as np
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from insightface.utils import face_align
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from insightface.app import FaceAnalysis
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from facexlib.recognition import init_recognition_model
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__all__ = [
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"FaceEncoderArcFace",
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"get_landmarks_from_image",
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]
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detector = None
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def get_landmarks_from_image(image):
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"""
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Detect landmarks with insightface.
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Args:
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image (np.ndarray or PIL.Image):
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The input image in RGB format.
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Returns:
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5 2D keypoints, only one face will be returned.
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"""
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global detector
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if detector is None:
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detector = FaceAnalysis()
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detector.prepare(ctx_id=0, det_size=(640, 640))
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in_image = np.array(image).copy()
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faces = detector.get(in_image)
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if len(faces) == 0:
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raise ValueError("No face detected in the image")
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face = max(faces, key=lambda x: (x.bbox[2] - x.bbox[0]) * (x.bbox[3] - x.bbox[1]))
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keypoints = face.kps
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return keypoints
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class FaceEncoderArcFace():
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""" Official ArcFace, no_grad-only """
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def __repr__(self):
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return "ArcFace"
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def init_encoder_model(self, device, eval_mode=True):
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self.device = device
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self.encoder_model = init_recognition_model('arcface', device=device)
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if eval_mode:
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self.encoder_model.eval()
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@torch.no_grad()
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def input_preprocessing(self, in_image, landmarks, image_size=112):
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assert landmarks is not None, "landmarks are not provided!"
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in_image = np.array(in_image)
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landmark = np.array(landmarks)
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face_aligned = face_align.norm_crop(in_image, landmark=landmark, image_size=image_size)
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image_transform = T.Compose([
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T.ToTensor(),
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T.Normalize([0.5], [0.5]),
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])
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face_aligned = image_transform(face_aligned).unsqueeze(0).to(self.device)
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return face_aligned
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@torch.no_grad()
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def __call__(self, in_image, need_proc=False, landmarks=None, image_size=112):
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if need_proc:
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in_image = self.input_preprocessing(in_image, landmarks, image_size)
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else:
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assert isinstance(in_image, torch.Tensor)
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in_image = in_image[:, [2, 1, 0], :, :].contiguous()
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image_embeds = self.encoder_model(in_image)
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return image_embeds |
