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float64 .nd2 files don't recognize intensities above 2**16-1 #64

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@joaomamede

When opening a .nd2 that was deconvolved that has intensity values higher than 65535.0, they don't get recognized and the image doesn't render well.

from nd2reader import ND2Reader
a = ND2Reader('./WellC05_ChannelFITC (Em),mRuby3,DIC_Seq0007.nd2')
a.bundle_axes ='zyx' 
a.iter_axes = 'c'
a[0].dtype
a[0].max()

In this example, only the green signal is over 2**16-1 in intensity. The green signals that are higher show up as nan or 0
image

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