nanshe/imp/segment.py: Instead of using `numpy.empty`, use `numpy.empty_like` because as we are using the same `shape` and `dtype` of the other array.
nanshe/imp/segment.py: Instead of using `numpy.empty`, use `numpy.empty_like` because as we are using the same `shape` and `dtype` of the other array.

jakirkham/nanshe,DudLab/nanshe,nanshe-org/nanshe,jakirkham/nanshe,nanshe-org/nanshe,DudLab/nanshe