bug in load_image of nt_toolbox/signal.py?

[liyongsea]

Hello,

It sems to me there is a bug in the function load_image of nt_toolbox/signal.py. In order to load an image encoded in np.unit64 and re-normalize it between [0, 1], I think one should convert the image into a np.float64 array first (which is not done in the curent code if i am not mistaken)

Best,
Jia