AttributeError: module 'numpy' has no attribute 'astype' in ems2png

[erpri]

Hi there.

Just found a small bug in ems2png tool. It fails generating png files with AttributeError: module 'numpy' has no attribute 'astype' when processing VTR files.

Location:
Line 85 in src/ems2png/main.py.

Current (broken) code:

img_data = np.astype(np.sqrt(data_interp.T - min_val) * vmul, np.uint16)

Fix, that worked for me (Python 3.10, NumPy 1.26.4, Ubuntu 22.04):

img_data = np.array(np.sqrt(data_interp.T - min_val) * vmul, dtype=np.uint16)