ValueError: zero-size array to reduction operation minimum which has no identity

[JaySenthil]

Hello,

When I run the inference pipeline for spine_muscle_adipose_tissue, I get the following errors for some of my datasets. I believe its because the posterior_anterior_line array is all zeros, which causes np.where to return an empty array, and then np.min to return the error seen below.

Traceback (most recent call last):
File "/sfs/qumulo/qhome//Comp2Comp/comp2comp/utils/process.py", line 131, in process_3d
pipeline(output_dir=output_dir, model_dir=model_dir)
File "/sfs/qumulo/qhome//Comp2Comp/comp2comp/inference_pipeline.py", line 73, in call
output = inference_class(inference_pipeline=self, output)
File "/sfs/qumulo/qhome//Comp2Comp/comp2comp/inference_pipeline.py", line 69, in call
output = inference_class(
File "/sfs/qumulo/qhome//Comp2Comp/comp2comp/spine/spine.py", line 314, in call
spine_utils.compute_rois(
File "/sfs/qumulo/qhome//Comp2Comp/comp2comp/spine/spine_utils.py", line 378, in compute_rois
roi, mask_2d = roi_from_mask(
File "/sfs/qumulo/qhome//Comp2Comp/comp2comp/spine/spine_utils.py", line 247, in roi_from_mask
np.min(np.where(posterior_anterior_line == 1))
File "<array_function internals>", line 180, in amin
File "/home//.conda/envs/c2c/lib/python3.9/site-packages/numpy/core/fromnumeric.py", line 2918, in amin
return _wrapreduction(a, np.minimum, 'min', axis, None, out,
File "/home/**/.conda/envs/c2c/lib/python3.9/site-packages/numpy/core/fromnumeric.py", line 86, in _wrapreduction
return ufunc.reduce(obj, axis, dtype, out, **passkwargs)
ValueError: zero-size array to reduction operation minimum which has no identity

I'm not sure how to fix the error. Please let me know. Thanks.