check pixel types

[dominikl]

Proper convert the numpy data type to ome_types PixelType.

[jburel]

This is basically the reverse of what has been implemented in ome/omero-py#387
When working on the "registration"
This is what I have been using

PIXELS_TYPE = {'int8': PixelsTypeint8,
               'int16': PixelsTypeint16,
               'uint8': PixelsTypeuint8,
               'uint16': PixelsTypeuint16,
               'int32': PixelsTypeint32,
               'float_': PixelsTypefloat,
               'float8': PixelsTypefloat,
               'float16': PixelsTypefloat,
               'float32': PixelsTypefloat,
               'float64': PixelsTypedouble,
               'complex_': PixelsTypecomplex,
               'complex64': PixelsTypecomplex}

Extracted from https://github.com/ome/omero-py/blob/master/src/omero/gateway/__init__.py#L3830 and adjusted

[dominikl]

Yes :-) . I know, at some point soon we'll be able to register a zarr without metadata.xml step, but for now I'll need it to test samples from new IDR submissions.

[jburel]

My point was more to create a map since this could potentially be used elsewhere instead of the current implementation with if statement