KeyError: 'Unable to open object (component not found)'

[cshang412]

[2024/05/18 11:06:02 hloc WARNING] The database already exists, deleting it.
[2024/05/18 11:06:02 hloc INFO] Creating an empty database...
[2024/05/18 11:06:02 hloc INFO] Importing images into the database...
[2024/05/18 11:06:14 hloc INFO] Importing features into the database...
  0%|                                                                                                                                                             | 0/130 [00:00<?, ?it/s]
---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
Cell In[7], line 1
----> 1 model = reconstruction.main(sfm_dir, images, sfm_pairs, feature_path, match_path)

File [~/ai/wp/chenshang_ws/hloc_ws/Hierarchical-Localization/hloc/reconstruction.py:130](http://111.229.101.159:64002/lab/tree/hloc_ws/Hierarchical-Localization/hloc_ws/Hierarchical-Localization/hloc/reconstruction.py#line=129), in main(sfm_dir, image_dir, pairs, features, matches, camera_mode, verbose, skip_geometric_verification, min_match_score, image_list, image_options, mapper_options)
    128 import_images(image_dir, database, camera_mode, image_list, image_options)
    129 image_ids = get_image_ids(database)
--> 130 import_features(image_ids, database, features)
    131 import_matches(
    132     image_ids,
    133     database,
   (...)
    137     skip_geometric_verification,
    138 )
    139 if not skip_geometric_verification:

File [~/ai/wp/chenshang_ws/hloc_ws/Hierarchical-Localization/hloc/triangulation.py:71](http://111.229.101.159:64002/lab/tree/hloc_ws/Hierarchical-Localization/hloc_ws/Hierarchical-Localization/hloc/triangulation.py#line=70), in import_features(image_ids, database_path, features_path)
     68 db = COLMAPDatabase.connect(database_path)
     70 for image_name, image_id in tqdm(image_ids.items()):
---> 71     keypoints = get_keypoints(features_path, image_name)
     72     keypoints += 0.5  # COLMAP origin
     73     db.add_keypoints(image_id, keypoints)

File [~/ai/wp/chenshang_ws/hloc_ws/Hierarchical-Localization/hloc/utils/io.py:40](http://111.229.101.159:64002/lab/tree/hloc_ws/Hierarchical-Localization/hloc_ws/Hierarchical-Localization/hloc/utils/io.py#line=39), in get_keypoints(path, name, return_uncertainty)
     36 def get_keypoints(
     37     path: Path, name: str, return_uncertainty: bool = False
     38 ) -> np.ndarray:
     39     with h5py.File(str(path), "r", libver="latest") as hfile:
---> 40         dset = hfile[name]["keypoints"]
     41         p = dset.__array__()
     42         uncertainty = dset.attrs.get("uncertainty")

File h5py/_objects.pyx:54, in h5py._objects.with_phil.wrapper()

File h5py/_objects.pyx:55, in h5py._objects.with_phil.wrapper()

File [~/anaconda3/envs/hloc/lib/python3.8/site-packages/h5py/_hl/group.py:288](http://111.229.101.159:64002/home/easyits/anaconda3/envs/hloc/lib/python3.8/site-packages/h5py/_hl/group.py#line=287), in Group.__getitem__(self, name)
    286         raise ValueError("Invalid HDF5 object reference")
    287 else:
--> 288     oid = h5o.open(self.id, self._e(name), lapl=self._lapl)
    290 otype = h5i.get_type(oid)
    291 if otype == h5i.GROUP:

File h5py/_objects.pyx:54, in h5py._objects.with_phil.wrapper()

File h5py/_objects.pyx:55, in h5py._objects.with_phil.wrapper()

File h5py/h5o.pyx:190, in h5py.h5o.open()

KeyError: 'Unable to open object (component not found)'

[xushangnjlh]

some of images' local feature has not extracted, maybe your image dir does not cover all the images the sfm needed. I have also encountered this when I messed up with my dataset's image dir.