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| import sys | |
| from pathlib import Path | |
| import subprocess | |
| import torch | |
| from ..utils.base_model import BaseModel | |
| from hloc import logger | |
| lanet_path = Path(__file__).parent / "../../third_party/lanet" | |
| sys.path.append(str(lanet_path)) | |
| from network_v0.model import PointModel | |
| device = torch.device("cuda" if torch.cuda.is_available() else "cpu") | |
| class LANet(BaseModel): | |
| default_conf = { | |
| "model_name": "v0", | |
| "keypoint_threshold": 0.1, | |
| "max_keypoints": 1024, | |
| } | |
| required_inputs = ["image"] | |
| def _init(self, conf): | |
| model_path = ( | |
| lanet_path / "checkpoints" / f'PointModel_{conf["model_name"]}.pth' | |
| ) | |
| if not model_path.exists(): | |
| print(f"No model found at {model_path}") | |
| self.net = PointModel(is_test=True) | |
| state_dict = torch.load(model_path, map_location="cpu") | |
| self.net.load_state_dict(state_dict["model_state"]) | |
| logger.info(f"Load LANet model done.") | |
| def _forward(self, data): | |
| image = data["image"] | |
| keypoints, scores, descriptors = self.net(image) | |
| _, _, Hc, Wc = descriptors.shape | |
| # Scores & Descriptors | |
| kpts_score = torch.cat([keypoints, scores], dim=1).view(3, -1).t() | |
| descriptors = descriptors.view(256, Hc, Wc).view(256, -1).t() | |
| # Filter based on confidence threshold | |
| descriptors = descriptors[ | |
| kpts_score[:, 0] > self.conf["keypoint_threshold"], : | |
| ] | |
| kpts_score = kpts_score[ | |
| kpts_score[:, 0] > self.conf["keypoint_threshold"], : | |
| ] | |
| keypoints = kpts_score[:, 1:] | |
| scores = kpts_score[:, 0] | |
| idxs = scores.argsort()[-self.conf["max_keypoints"] or None :] | |
| keypoints = keypoints[idxs, :2] | |
| descriptors = descriptors[idxs] | |
| scores = scores[idxs] | |
| return { | |
| "keypoints": keypoints[None], | |
| "scores": scores[None], | |
| "descriptors": descriptors.T[None], | |
| } | |