read_matrix (
        self,
        ijk_origin,
        ijk_size,
        ijk_step,
        progress,
        )

signed8_to_unsigned8 ( self )

MRC format does not support unsigned 8-bit integers although it is sometimes used for such data with data type incorrectly specified as signed 8-bit integers.

__init__ (
        self,
        path,
        file_type='mrc',
        )