Object Analysis for Coco Dataset (M7): "ValueError: zero-dimensional arrays cannot be concatenated"

Hi,

when trying to run the Object Analysis notebook on the Coco dataset I am getting the following error in the "Analyses" section of "(M7) Metric: Size and Distance from Center of Supercategories":

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-38-6ffb36b669b2> in <module>
      1 if first_pass:
----> 2     object_size(cat_to_ent[0][1], None)
      3 ui = HBox(all_things)
      4 out = widgets.interactive_output(object_size, {'object_class': object_class_widget, 'sizes': sizes_widget})
      5 display(ui, out)

<ipython-input-37-46aecec2feb8> in object_size(object_class, sizes)
    144     these_instances = np.concatenate(instances_per, axis=0)
    145     scenes_per = np.array([dataset.from_path(filepath)[1][4] for filepath in filepaths])
--> 146     these_scenes = np.concatenate(scenes_per, axis=0)
    147     num, counts = np.unique(these_instances, return_counts=True)
    148     num = np.array([categories.index(nu) for nu in num])

<__array_function__ internals> in concatenate(*args, **kwargs)

ValueError: zero-dimensional arrays cannot be concatenated

<Figure size 432x288 with 0 Axes>

The issue is, that the variable scenes_per is simply a list of None's:

[None None None None None None None None None None None None None None
 None None None None None None None None None None None None None None
 None None None None None None None None None None None]

printing dataset.from_path(filepath)[1] for one filepath in filepaths results in:

[[{'bbox': [0.23233333333333334, 0.999, 0.22865625, 1.0], 'label': 1}, {'bbox': [0.28827083333333337, 0.6980625, 0.6325000000000001, 0.88925], 'label': 88}, {'bbox': [0.003, 0.23970833333333333, 0.9039375, 0.987078125], 'label': 65}], [1, [0.23233333333333334, 0.999, 0.22865625, 1.0]], [0], '/n/fs/visualai-scr/Data/Coco/2014data/train2014/COCO_train2014_000000176176.jpg', None]

I verified, that the image at the given path exists. Can anyone help me with this issue? Thanks in advance!

Best regards, Tobias

princetonvisualai / revise-tool

Object Analysis for Coco Dataset (M7): "ValueError: zero-dimensional arrays cannot be concatenated" #11