ValueError: zero-size array to reduction operation minimum which has no identity
I tried to save my cropped images using matplotlib, but I get an error like this
File "tools/script.py", line 165, in main
out_when_no_box=args.out_when_no_box
File "/home/user/project/vis.py", line 99, in vis_one_image
plt.imsave('/home/user/data/masks/' + file_name + '_' + str(i) + '.png', crop_mask)
File "/home/user/.local/lib/python3.5/site-packages/matplotlib/pyplot.py", line 2157, in imsave
return matplotlib.image.imsave(fname, arr, **kwargs)
File "/home/user/.local/lib/python3.5/site-packages/matplotlib/image.py", line 1418, in imsave
image.set_data(arr)
File "/home/user/.local/lib/python3.5/site-packages/matplotlib/image.py", line 646, in set_data
if self._A.min() < 0 or high < self._A.max():
File "/home/user/.local/lib/python3.5/site-packages/numpy/ma/core.py", line 5641, in min
axis=axis, out=out, **kwargs).view(type(self))
File "/home/user/.local/lib/python3.5/site-packages/numpy/core/_methods.py", line 34, in _amin
return umr_minimum(a, axis, None, out, keepdims, initial, where)
ValueError: zero-size array to reduction operation minimum which has no identit