NT-MDT data: Python parsing library

A native file format of NT-MDT scientific software. Usually contains any of:

Some examples of mdt files can be downloaded at:

  • http://www.ntmdt-si.ru/scan-gallery
  • http://callistosoft.narod.ru/Resources/Mdt.zip

Application

["Nova", "Image Analysis", "NanoEducator", "Gwyddion", "Callisto"]

File extension

mdt

KS implementation details

License: GPL-3.0-or-later

This page hosts a formal specification of NT-MDT data using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.

Usage

Runtime library

All parsing code for Python generated by Kaitai Struct depends on the Python runtime library. You have to install it before you can parse data.

The Python runtime library can be installed from PyPI:

python3 -m pip install kaitaistruct

Code

Parse a local file and get structure in memory:

data = NtMdt.from_file("path/to/local/file.mdt")

Or parse structure from a bytes:

from kaitaistruct import KaitaiStream, BytesIO

raw = b"\x00\x01\x02..."
data = NtMdt(KaitaiStream(BytesIO(raw)))

After that, one can get various attributes from the structure by invoking getter methods like:

data.size # => File size (w/o header)

Python source code to parse NT-MDT data

nt_mdt.py

# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild

from pkg_resources import parse_version
import kaitaistruct
from kaitaistruct import KaitaiStruct, KaitaiStream, BytesIO
from enum import Enum


if parse_version(kaitaistruct.__version__) < parse_version('0.9'):
    raise Exception("Incompatible Kaitai Struct Python API: 0.9 or later is required, but you have %s" % (kaitaistruct.__version__))

class NtMdt(KaitaiStruct):
    """A native file format of NT-MDT scientific software. Usually contains
    any of:
    
    * [Scanning probe](https://en.wikipedia.org/wiki/Scanning_probe_microscopy) microscopy scans and spectra
    * [Raman spectra](https://en.wikipedia.org/wiki/Raman_spectroscopy)
    * results of their analysis
    
    Some examples of mdt files can be downloaded at:
    
    * http://www.ntmdt-si.ru/scan-gallery
    * http://callistosoft.narod.ru/Resources/Mdt.zip
    
    .. seealso::
       Source - https://svn.code.sf.net/p/gwyddion/code/trunk/gwyddion/modules/file/nt-mdt.c
    """

    class AdcMode(Enum):
        height = 0
        dfl = 1
        lateral_f = 2
        bias_v = 3
        current = 4
        fb_out = 5
        mag = 6
        mag_sin = 7
        mag_cos = 8
        rms = 9
        calc_mag = 10
        phase1 = 11
        phase2 = 12
        calc_phase = 13
        ex1 = 14
        ex2 = 15
        hv_x = 16
        hv_y = 17
        snap_back = 18
        false = 255

    class XmlScanLocation(Enum):
        hlt = 0
        hlb = 1
        hrt = 2
        hrb = 3
        vlt = 4
        vlb = 5
        vrt = 6
        vrb = 7

    class DataType(Enum):
        floatfix = -65544
        float80 = -16138
        float64 = -13320
        float48 = -9990
        float32 = -5892
        int64 = -8
        int32 = -4
        int16 = -2
        int8 = -1
        unknown0 = 0
        uint8 = 1
        uint16 = 2
        uint32 = 4
        uint64 = 8

    class XmlParamType(Enum):
        none = 0
        laser_wavelength = 1
        units = 2
        data_array = 255

    class SpmMode(Enum):
        constant_force = 0
        contact_constant_height = 1
        contact_error = 2
        lateral_force = 3
        force_modulation = 4
        spreading_resistance_imaging = 5
        semicontact_topography = 6
        semicontact_error = 7
        phase_contrast = 8
        ac_magnetic_force = 9
        dc_magnetic_force = 10
        electrostatic_force = 11
        capacitance_contrast = 12
        kelvin_probe = 13
        constant_current = 14
        barrier_height = 15
        constant_height = 16
        afam = 17
        contact_efm = 18
        shear_force_topography = 19
        sfom = 20
        contact_capacitance = 21
        snom_transmission = 22
        snom_reflection = 23
        snom_all = 24
        snom = 25

    class Unit(Enum):
        raman_shift = -10
        reserved0 = -9
        reserved1 = -8
        reserved2 = -7
        reserved3 = -6
        meter = -5
        centi_meter = -4
        milli_meter = -3
        micro_meter = -2
        nano_meter = -1
        angstrom = 0
        nano_ampere = 1
        volt = 2
        none = 3
        kilo_hertz = 4
        degrees = 5
        percent = 6
        celsius_degree = 7
        volt_high = 8
        second = 9
        milli_second = 10
        micro_second = 11
        nano_second = 12
        counts = 13
        pixels = 14
        reserved_sfom0 = 15
        reserved_sfom1 = 16
        reserved_sfom2 = 17
        reserved_sfom3 = 18
        reserved_sfom4 = 19
        ampere2 = 20
        milli_ampere = 21
        micro_ampere = 22
        nano_ampere2 = 23
        pico_ampere = 24
        volt2 = 25
        milli_volt = 26
        micro_volt = 27
        nano_volt = 28
        pico_volt = 29
        newton = 30
        milli_newton = 31
        micro_newton = 32
        nano_newton = 33
        pico_newton = 34
        reserved_dos0 = 35
        reserved_dos1 = 36
        reserved_dos2 = 37
        reserved_dos3 = 38
        reserved_dos4 = 39

    class SpmTechnique(Enum):
        contact_mode = 0
        semicontact_mode = 1
        tunnel_current = 2
        snom = 3

    class Consts(Enum):
        frame_mode_size = 8
        frame_header_size = 22
        axis_scales_size = 30
        file_header_size = 32
        spectro_vars_min_size = 38
        scan_vars_min_size = 77
    def __init__(self, _io, _parent=None, _root=None):
        self._io = _io
        self._parent = _parent
        self._root = _root if _root else self
        self._read()

    def _read(self):
        self.signature = self._io.read_bytes(4)
        if not self.signature == b"\x01\xB0\x93\xFF":
            raise kaitaistruct.ValidationNotEqualError(b"\x01\xB0\x93\xFF", self.signature, self._io, u"/seq/0")
        self.size = self._io.read_u4le()
        self.reserved0 = self._io.read_bytes(4)
        self.last_frame = self._io.read_u2le()
        self.reserved1 = self._io.read_bytes(18)
        self.wrond_doc = self._io.read_bytes(1)
        self._raw_frames = self._io.read_bytes(self.size)
        _io__raw_frames = KaitaiStream(BytesIO(self._raw_frames))
        self.frames = NtMdt.Framez(_io__raw_frames, self, self._root)

    class Uuid(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            self._io = _io
            self._parent = _parent
            self._root = _root if _root else self
            self._read()

        def _read(self):
            self.data = [None] * (16)
            for i in range(16):
                self.data[i] = self._io.read_u1()



    class Framez(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            self._io = _io
            self._parent = _parent
            self._root = _root if _root else self
            self._read()

        def _read(self):
            self.frames = [None] * ((self._root.last_frame + 1))
            for i in range((self._root.last_frame + 1)):
                self.frames[i] = NtMdt.Frame(self._io, self, self._root)



    class Frame(KaitaiStruct):

        class FrameType(Enum):
            scanned = 0
            spectroscopy = 1
            text = 3
            old_mda = 105
            mda = 106
            palette = 107
            curves_new = 190
            curves = 201
        def __init__(self, _io, _parent=None, _root=None):
            self._io = _io
            self._parent = _parent
            self._root = _root if _root else self
            self._read()

        def _read(self):
            self.size = self._io.read_u4le()
            self._raw_main = self._io.read_bytes((self.size - 4))
            _io__raw_main = KaitaiStream(BytesIO(self._raw_main))
            self.main = NtMdt.Frame.FrameMain(_io__raw_main, self, self._root)

        class Dots(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                self._io = _io
                self._parent = _parent
                self._root = _root if _root else self
                self._read()

            def _read(self):
                self.fm_ndots = self._io.read_u2le()
                if self.fm_ndots > 0:
                    self.coord_header = NtMdt.Frame.Dots.DotsHeader(self._io, self, self._root)

                self.coordinates = [None] * (self.fm_ndots)
                for i in range(self.fm_ndots):
                    self.coordinates[i] = NtMdt.Frame.Dots.DotsData(self._io, self, self._root)

                self.data = [None] * (self.fm_ndots)
                for i in range(self.fm_ndots):
                    self.data[i] = NtMdt.Frame.Dots.DataLinez(i, self._io, self, self._root)


            class DotsHeader(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.header_size = self._io.read_s4le()
                    self._raw_header = self._io.read_bytes(self.header_size)
                    _io__raw_header = KaitaiStream(BytesIO(self._raw_header))
                    self.header = NtMdt.Frame.Dots.DotsHeader.Header(_io__raw_header, self, self._root)

                class Header(KaitaiStruct):
                    def __init__(self, _io, _parent=None, _root=None):
                        self._io = _io
                        self._parent = _parent
                        self._root = _root if _root else self
                        self._read()

                    def _read(self):
                        self.coord_size = self._io.read_s4le()
                        self.version = self._io.read_s4le()
                        self.xyunits = KaitaiStream.resolve_enum(NtMdt.Unit, self._io.read_s2le())



            class DotsData(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.coord_x = self._io.read_f4le()
                    self.coord_y = self._io.read_f4le()
                    self.forward_size = self._io.read_s4le()
                    self.backward_size = self._io.read_s4le()


            class DataLinez(KaitaiStruct):
                def __init__(self, index, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self.index = index
                    self._read()

                def _read(self):
                    self.forward = [None] * (self._parent.coordinates[self.index].forward_size)
                    for i in range(self._parent.coordinates[self.index].forward_size):
                        self.forward[i] = self._io.read_s2le()

                    self.backward = [None] * (self._parent.coordinates[self.index].backward_size)
                    for i in range(self._parent.coordinates[self.index].backward_size):
                        self.backward[i] = self._io.read_s2le()




        class FrameMain(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                self._io = _io
                self._parent = _parent
                self._root = _root if _root else self
                self._read()

            def _read(self):
                self.type = KaitaiStream.resolve_enum(NtMdt.Frame.FrameType, self._io.read_u2le())
                self.version = NtMdt.Version(self._io, self, self._root)
                self.date_time = NtMdt.Frame.DateTime(self._io, self, self._root)
                self.var_size = self._io.read_u2le()
                _on = self.type
                if _on == NtMdt.Frame.FrameType.mda:
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdMetaData(_io__raw_frame_data, self, self._root)
                elif _on == NtMdt.Frame.FrameType.curves_new:
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdCurvesNew(_io__raw_frame_data, self, self._root)
                elif _on == NtMdt.Frame.FrameType.curves:
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdSpectroscopy(_io__raw_frame_data, self, self._root)
                elif _on == NtMdt.Frame.FrameType.spectroscopy:
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdSpectroscopy(_io__raw_frame_data, self, self._root)
                elif _on == NtMdt.Frame.FrameType.scanned:
                    self._raw_frame_data = self._io.read_bytes_full()
                    _io__raw_frame_data = KaitaiStream(BytesIO(self._raw_frame_data))
                    self.frame_data = NtMdt.Frame.FdScanned(_io__raw_frame_data, self, self._root)
                else:
                    self.frame_data = self._io.read_bytes_full()


        class FdCurvesNew(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                self._io = _io
                self._parent = _parent
                self._root = _root if _root else self
                self._read()

            def _read(self):
                self.block_count = self._io.read_u4le()
                self.blocks_headers = [None] * (self.block_count)
                for i in range(self.block_count):
                    self.blocks_headers[i] = NtMdt.Frame.FdCurvesNew.BlockDescr(self._io, self, self._root)

                self.blocks_names = [None] * (self.block_count)
                for i in range(self.block_count):
                    self.blocks_names[i] = (self._io.read_bytes(self.blocks_headers[i].name_len)).decode(u"UTF-8")

                self.blocks_data = [None] * (self.block_count)
                for i in range(self.block_count):
                    self.blocks_data[i] = self._io.read_bytes(self.blocks_headers[i].len)


            class BlockDescr(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.name_len = self._io.read_u4le()
                    self.len = self._io.read_u4le()



        class FdMetaData(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                self._io = _io
                self._parent = _parent
                self._root = _root if _root else self
                self._read()

            def _read(self):
                self.head_size = self._io.read_u4le()
                self.tot_len = self._io.read_u4le()
                self.guids = [None] * (2)
                for i in range(2):
                    self.guids[i] = NtMdt.Uuid(self._io, self, self._root)

                self.frame_status = self._io.read_bytes(4)
                self.name_size = self._io.read_u4le()
                self.comm_size = self._io.read_u4le()
                self.view_info_size = self._io.read_u4le()
                self.spec_size = self._io.read_u4le()
                self.source_info_size = self._io.read_u4le()
                self.var_size = self._io.read_u4le()
                self.data_offset = self._io.read_u4le()
                self.data_size = self._io.read_u4le()
                self.title = (self._io.read_bytes(self.name_size)).decode(u"UTF-8")
                self.xml = (self._io.read_bytes(self.comm_size)).decode(u"UTF-8")
                self.struct_len = self._io.read_u4le()
                self.array_size = self._io.read_u8le()
                self.cell_size = self._io.read_u4le()
                self.n_dimensions = self._io.read_u4le()
                self.n_mesurands = self._io.read_u4le()
                self.dimensions = [None] * (self.n_dimensions)
                for i in range(self.n_dimensions):
                    self.dimensions[i] = NtMdt.Frame.FdMetaData.Calibration(self._io, self, self._root)

                self.mesurands = [None] * (self.n_mesurands)
                for i in range(self.n_mesurands):
                    self.mesurands[i] = NtMdt.Frame.FdMetaData.Calibration(self._io, self, self._root)


            class Image(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.image = []
                    i = 0
                    while not self._io.is_eof():
                        self.image.append(NtMdt.Frame.FdMetaData.Image.Vec(self._io, self, self._root))
                        i += 1


                class Vec(KaitaiStruct):
                    def __init__(self, _io, _parent=None, _root=None):
                        self._io = _io
                        self._parent = _parent
                        self._root = _root if _root else self
                        self._read()

                    def _read(self):
                        self.items = [None] * (self._parent._parent.n_mesurands)
                        for i in range(self._parent._parent.n_mesurands):
                            _on = self._parent._parent.mesurands[i].data_type
                            if _on == NtMdt.DataType.uint64:
                                self.items[i] = self._io.read_u8le()
                            elif _on == NtMdt.DataType.uint8:
                                self.items[i] = self._io.read_u1()
                            elif _on == NtMdt.DataType.float32:
                                self.items[i] = self._io.read_f4le()
                            elif _on == NtMdt.DataType.int8:
                                self.items[i] = self._io.read_s1()
                            elif _on == NtMdt.DataType.uint16:
                                self.items[i] = self._io.read_u2le()
                            elif _on == NtMdt.DataType.int64:
                                self.items[i] = self._io.read_s8le()
                            elif _on == NtMdt.DataType.uint32:
                                self.items[i] = self._io.read_u4le()
                            elif _on == NtMdt.DataType.float64:
                                self.items[i] = self._io.read_f8le()
                            elif _on == NtMdt.DataType.int16:
                                self.items[i] = self._io.read_s2le()
                            elif _on == NtMdt.DataType.int32:
                                self.items[i] = self._io.read_s4le()




            class Calibration(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.len_tot = self._io.read_u4le()
                    self.len_struct = self._io.read_u4le()
                    self.len_name = self._io.read_u4le()
                    self.len_comment = self._io.read_u4le()
                    self.len_unit = self._io.read_u4le()
                    self.si_unit = self._io.read_u8le()
                    self.accuracy = self._io.read_f8le()
                    self.function_id_and_dimensions = self._io.read_u8le()
                    self.bias = self._io.read_f8le()
                    self.scale = self._io.read_f8le()
                    self.min_index = self._io.read_u8le()
                    self.max_index = self._io.read_u8le()
                    self.data_type = KaitaiStream.resolve_enum(NtMdt.DataType, self._io.read_s4le())
                    self.len_author = self._io.read_u4le()
                    self.name = (self._io.read_bytes(self.len_name)).decode(u"utf-8")
                    self.comment = (self._io.read_bytes(self.len_comment)).decode(u"utf-8")
                    self.unit = (self._io.read_bytes(self.len_unit)).decode(u"utf-8")
                    self.author = (self._io.read_bytes(self.len_author)).decode(u"utf-8")

                @property
                def count(self):
                    if hasattr(self, '_m_count'):
                        return self._m_count if hasattr(self, '_m_count') else None

                    self._m_count = ((self.max_index - self.min_index) + 1)
                    return self._m_count if hasattr(self, '_m_count') else None


            @property
            def image(self):
                if hasattr(self, '_m_image'):
                    return self._m_image if hasattr(self, '_m_image') else None

                _pos = self._io.pos()
                self._io.seek(self.data_offset)
                self._raw__m_image = self._io.read_bytes(self.data_size)
                _io__raw__m_image = KaitaiStream(BytesIO(self._raw__m_image))
                self._m_image = NtMdt.Frame.FdMetaData.Image(_io__raw__m_image, self, self._root)
                self._io.seek(_pos)
                return self._m_image if hasattr(self, '_m_image') else None


        class FdSpectroscopy(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                self._io = _io
                self._parent = _parent
                self._root = _root if _root else self
                self._read()

            def _read(self):
                self._raw_vars = self._io.read_bytes(self._parent.var_size)
                _io__raw_vars = KaitaiStream(BytesIO(self._raw_vars))
                self.vars = NtMdt.Frame.FdSpectroscopy.Vars(_io__raw_vars, self, self._root)
                self.fm_mode = self._io.read_u2le()
                self.fm_xres = self._io.read_u2le()
                self.fm_yres = self._io.read_u2le()
                self.dots = NtMdt.Frame.Dots(self._io, self, self._root)
                self.data = [None] * ((self.fm_xres * self.fm_yres))
                for i in range((self.fm_xres * self.fm_yres)):
                    self.data[i] = self._io.read_s2le()

                self.title = NtMdt.Title(self._io, self, self._root)
                self.xml = NtMdt.Xml(self._io, self, self._root)

            class Vars(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.x_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.y_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.z_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.sp_mode = self._io.read_u2le()
                    self.sp_filter = self._io.read_u2le()
                    self.u_begin = self._io.read_f4le()
                    self.u_end = self._io.read_f4le()
                    self.z_up = self._io.read_s2le()
                    self.z_down = self._io.read_s2le()
                    self.sp_averaging = self._io.read_u2le()
                    self.sp_repeat = self._io.read_u1()
                    self.sp_back = self._io.read_u1()
                    self.sp_4nx = self._io.read_s2le()
                    self.sp_osc = self._io.read_u1()
                    self.sp_n4 = self._io.read_u1()
                    self.sp_4x0 = self._io.read_f4le()
                    self.sp_4xr = self._io.read_f4le()
                    self.sp_4u = self._io.read_s2le()
                    self.sp_4i = self._io.read_s2le()
                    self.sp_nx = self._io.read_s2le()



        class DateTime(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                self._io = _io
                self._parent = _parent
                self._root = _root if _root else self
                self._read()

            def _read(self):
                self.date = NtMdt.Frame.DateTime.Date(self._io, self, self._root)
                self.time = NtMdt.Frame.DateTime.Time(self._io, self, self._root)

            class Date(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.year = self._io.read_u2le()
                    self.month = self._io.read_u2le()
                    self.day = self._io.read_u2le()


            class Time(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.hour = self._io.read_u2le()
                    self.min = self._io.read_u2le()
                    self.sec = self._io.read_u2le()



        class AxisScale(KaitaiStruct):
            def __init__(self, _io, _parent=None, _root=None):
                self._io = _io
                self._parent = _parent
                self._root = _root if _root else self
                self._read()

            def _read(self):
                self.offset = self._io.read_f4le()
                self.step = self._io.read_f4le()
                self.unit = KaitaiStream.resolve_enum(NtMdt.Unit, self._io.read_s2le())


        class FdScanned(KaitaiStruct):

            class Mode(Enum):
                stm = 0
                afm = 1
                unknown2 = 2
                unknown3 = 3
                unknown4 = 4

            class InputSignal(Enum):
                extension_slot = 0
                bias_v = 1
                ground = 2

            class LiftMode(Enum):
                step = 0
                fine = 1
                slope = 2
            def __init__(self, _io, _parent=None, _root=None):
                self._io = _io
                self._parent = _parent
                self._root = _root if _root else self
                self._read()

            def _read(self):
                self._raw_vars = self._io.read_bytes(self._parent.var_size)
                _io__raw_vars = KaitaiStream(BytesIO(self._raw_vars))
                self.vars = NtMdt.Frame.FdScanned.Vars(_io__raw_vars, self, self._root)
                if False:
                    self.orig_format = self._io.read_u4le()

                if False:
                    self.tune = KaitaiStream.resolve_enum(NtMdt.Frame.FdScanned.LiftMode, self._io.read_u4le())

                if False:
                    self.feedback_gain = self._io.read_f8le()

                if False:
                    self.dac_scale = self._io.read_s4le()

                if False:
                    self.overscan = self._io.read_s4le()

                self.fm_mode = self._io.read_u2le()
                self.fm_xres = self._io.read_u2le()
                self.fm_yres = self._io.read_u2le()
                self.dots = NtMdt.Frame.Dots(self._io, self, self._root)
                self.image = [None] * ((self.fm_xres * self.fm_yres))
                for i in range((self.fm_xres * self.fm_yres)):
                    self.image[i] = self._io.read_s2le()

                self.title = NtMdt.Title(self._io, self, self._root)
                self.xml = NtMdt.Xml(self._io, self, self._root)

            class Vars(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.x_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.y_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.z_scale = NtMdt.Frame.AxisScale(self._io, self, self._root)
                    self.channel_index = KaitaiStream.resolve_enum(NtMdt.AdcMode, self._io.read_u1())
                    self.mode = KaitaiStream.resolve_enum(NtMdt.Frame.FdScanned.Mode, self._io.read_u1())
                    self.xres = self._io.read_u2le()
                    self.yres = self._io.read_u2le()
                    self.ndacq = self._io.read_u2le()
                    self.step_length = self._io.read_f4le()
                    self.adt = self._io.read_u2le()
                    self.adc_gain_amp_log10 = self._io.read_u1()
                    self.adc_index = self._io.read_u1()
                    self.input_signal_or_version = self._io.read_u1()
                    self.substr_plane_order_or_pass_num = self._io.read_u1()
                    self.scan_dir = NtMdt.Frame.FdScanned.ScanDir(self._io, self, self._root)
                    self.power_of_2 = self._io.read_u1()
                    self.velocity = self._io.read_f4le()
                    self.setpoint = self._io.read_f4le()
                    self.bias_voltage = self._io.read_f4le()
                    self.draw = self._io.read_u1()
                    self.reserved = self._io.read_u1()
                    self.xoff = self._io.read_s4le()
                    self.yoff = self._io.read_s4le()
                    self.nl_corr = self._io.read_u1()


            class Dot(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.x = self._io.read_s2le()
                    self.y = self._io.read_s2le()


            class ScanDir(KaitaiStruct):
                def __init__(self, _io, _parent=None, _root=None):
                    self._io = _io
                    self._parent = _parent
                    self._root = _root if _root else self
                    self._read()

                def _read(self):
                    self.unkn = self._io.read_bits_int_be(4)
                    self.double_pass = self._io.read_bits_int_be(1) != 0
                    self.bottom = self._io.read_bits_int_be(1) != 0
                    self.left = self._io.read_bits_int_be(1) != 0
                    self.horizontal = self._io.read_bits_int_be(1) != 0




    class Version(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            self._io = _io
            self._parent = _parent
            self._root = _root if _root else self
            self._read()

        def _read(self):
            self.minor = self._io.read_u1()
            self.major = self._io.read_u1()


    class Xml(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            self._io = _io
            self._parent = _parent
            self._root = _root if _root else self
            self._read()

        def _read(self):
            self.xml_len = self._io.read_u4le()
            self.xml = (self._io.read_bytes(self.xml_len)).decode(u"UTF-16LE")


    class Title(KaitaiStruct):
        def __init__(self, _io, _parent=None, _root=None):
            self._io = _io
            self._parent = _parent
            self._root = _root if _root else self
            self._read()

        def _read(self):
            self.title_len = self._io.read_u4le()
            self.title = (self._io.read_bytes(self.title_len)).decode(u"cp1251")