def get_3D_transform():
#with mrcfile.open("cropout_bin4.mrc") as mrc: # small example
with mrcfile.open("cropout.mrc") as mrc:
# coerce to double
realpart = flex.double(mrc.data.astype(np.float64))
# in-place resize to a good multiple of 2
realpart.resize(flex.grid(imax, imax, imax))
complpart = flex.double(flex.grid(imax, imax, imax))
#from IPython import embed; embed()
C3D = flex.complex_double(realpart, complpart)
from matplotlib import pyplot as plt
from scitbx import fftpack
#plt.imshow(S2D)
#plt.show()
#from IPython import embed; embed()
print "C3Dfocus", C3D.focus()
print C3D
FFT = fftpack.complex_to_complex_3d(
(C3D.focus()[0], C3D.focus()[1], C3D.focus()[2]))
c = FFT.forward(C3D)
print c.focus()
print c
return c
def raw(filename):
mrc = mrcfile.open(filename, permissive=True)
data = mrc.data
arr = np.zeros(shape=data.shape, dtype=data.dtype)
arr[:] = data[:]
data = 0
return arr
def make_photos(basename, working_directory):
"""
Convert MRC file with stack of classes to series of scaled PNGs for web viewing.
Args:
basename (str): name of desired folder within class_images - usually the same name as the mrc file.
working_directory (str): the base directory where :py:mod:`live_2d` is working.
Returns:
str: Directory path with new PNGs written out.
"""
live2dlog = logging.getLogger("live_2d")
if not os.path.isdir(os.path.join(working_directory, "class_images")):
os.mkdir(os.path.join(working_directory, "class_images"))
if not os.path.isdir(
os.path.join(working_directory, "class_images", basename)):
os.mkdir(os.path.join(working_directory, "class_images", basename))
photo_dir = os.path.join(working_directory, "class_images", basename)
with mrcfile.open(
os.path.join(working_directory, "{}.mrc".format(basename)),
"r") as stack:
for index, item in enumerate(stack.data):
imageio.imwrite(
os.path.join(photo_dir, "{}.png".format(index + 1)), item)
live2dlog.info(
f"Exported class averages to web-friendly images stored in {photo_dir}"
)
return photo_dir
def get_train_set(img_per_class): files = [] Y = [] for i in classes: for j in range(img_per_class): filename = '../data/SNR003/' + str(i) + '/tomotarget' + str(j) + '.mrc' files.append(filename) Y.append(classes.index(i)) # print(files) c = list(zip(files, Y)) random.shuffle(c) files, Y = zip(*c) count = 0 while True: if count == img_per_class*10: count = 0 f = mrcfile.open(files[count]) x = f.data x = pad(x) # x = norm_3d(x) x = np.expand_dims(x, axis = 0) x = np.expand_dims(x, axis = 4) y = Y[count] y_arr = np.zeros(10) y_arr[y] = 1 y_arr = np.expand_dims(y_arr, axis = 0) # print(x.shape) count += 1 # print(x) yield x, y_arr
def read_mrc(fname, cut_sino):
import mrcfile
# read mrc file for FEI extended header
# angles.mat file contains the angle information
proj_geom = {}
with mrcfile.open(fname, 'r', permissive=True) as mrc:
proj = mrc.data[:]
if cut_sino:
proj = proj[:, cut_sino:-cut_sino, cut_sino:-cut_sino]
proj_geom['type'] = 'parallel3d'
proj_geom['DetectorColCount'] = proj.shape[2]
proj_geom['DetectorRowCount'] = proj.shape[1]
proj_geom['DetectorSpacingX'] = 2. / proj.shape[2]
proj_geom['DetectorSpacingY'] = 2. / proj.shape[1]
proj_geom['DistanceOriginSource'] = 4.0
import struct
proj_geom['ProjectionAngles'] = np.zeros(proj.shape[0])
with open(fname, "rb") as f:
for i in range(proj.shape[0]):
f.seek(1024 + (i) * 128, 0)
byte_float = f.read(4)
proj_geom['ProjectionAngles'][i] = struct.unpack(
'f', byte_float)[0] * np.pi / 180
return proj, proj_geom
def intialize(): # initialize program
global mrc, img_matrix, shape, nx, ny, nz, df, unit, global_regionid, cube_id, threshold
fname = input("choose mrc file:")
mrc = mrcfile.open(fname, mode='r+')
img_matrix = np.copy(mrc.data)
img_matrix = gaussian_filter(img_matrix,
sigma=1,
mode="constant",
cval=0.0,
truncate=4.0)
img_matrix = gaussian_filter(img_matrix,
sigma=1,
mode="constant",
cval=0.0,
truncate=4.0)
threshold = img_matrix.mean()
nx = mrc.header.nx
ny = mrc.header.ny
nz = mrc.header.nz
shape = (nx, ny, nz)
# img_matrix = gaussian_filter(img_matrix, sigma=1, mode="constant", cval=0.0, truncate=4.0)
unit = int(math.sqrt(nx))
df = pd.DataFrame({"Name": [fname]})
df['region number in divide'] = "8/8"
global_regionid = -1
def read_mrc(image_path):
with mrcfile.open(image_path, permissive=True) as mrc:
mrc_image_data = np.copy(mrc.data)
mrc_image_data = np.squeeze(mrc_image_data)
mrc_image_data = np.flipud(mrc_image_data)
return mrc_image_data
def mrc_to_tiff(mrc: str, scaling_factor: float, outdir: str = None):
outdir = Path(outdir)
print("Loading mrc file...")
with mrcfile.open(mrc) as fmrc:
print("Starting conversion to .tiff\n")
futures = []
pbar = tqdm.tqdm(total=len(fmrc.data))
with concurrent.futures.ThreadPoolExecutor(
max_workers=WORKERS) as executor:
for i, image in enumerate(fmrc.data):
out = outdir / f"mrc_{i:05d}.tiff"
futures.append(
executor.submit(
convert,
image=image,
scaling_factor=scaling_factor,
out=out,
callback=pbar.update,
))
pbar.close()
print()
for future in futures:
ret = future.result()
def save_image_k3(mrc_name, height=494):
try:
micrograph = mrcfile.open(mrc_name, permissive=True).data
if len(micrograph.shape) == 3:
micrograph = micrograph.reshape(
(micrograph.shape[1], micrograph.shape[2]))
else:
micrograph = micrograph
new_img = scale_image(micrograph, height)
short_edge = min(
np.array(new_img).shape[0],
np.array(new_img).shape[1])
new_img_left = crop_left(np.array(new_img), short_edge, short_edge)
new_img_right = crop_right(np.array(new_img), short_edge, short_edge)
new_img.save(
os.path.join('MicAssess', 'jpgs', 'data',
(os.path.basename(mrc_name)[:-4] + '.jpg')))
new_img_left.save(
os.path.join('MicAssess', 'k3_left', 'data',
(os.path.basename(mrc_name)[:-4] + '.jpg')))
new_img_right.save(
os.path.join('MicAssess', 'k3_right', 'data',
(os.path.basename(mrc_name)[:-4] + '.jpg')))
except ValueError:
print('Warning - Having trouble converting this file:', mrc_name)
pass
def mrc2data(mrc_filename):
""" mrc2data
"""
mrc = mrcfile.open(mrc_filename, mode='r+')
data = mrc.data
mrc.close()
return data
def _read(self):
with mrcfile.open(self.filepath) as mrc:
im = mrc.data.astype('double')
# For multiple mrc files, mrcfile returns an ndarray with (shape n_images, height, width)
# swap axes 0 and 2 so we get the more natural (height, width, n_images)
if im.ndim == 3:
im = np.swapaxes(im, 0, 2)
self.original_im = im
# Discard outer pixels
im = im[
self.margin_top: -self.margin_bottom if self.margin_bottom is not None else None,
self.margin_left: -self.margin_right if self.margin_right is not None else None
]
if self.square:
side_length = min(im.shape[0], im.shape[1])
im = im[:side_length, :side_length]
if self.shrink_factor is not None:
size = tuple((np.array(im.shape) / config.apple.mrc_shrink_factor).astype(int))
im = np.array(Image.fromarray(im).resize(size, Image.BICUBIC))
if self.gauss_filter_size is not None:
im = signal.correlate(
im,
Micrograph.gaussian_filter(self.gauss_filter_size, self.gauss_filter_sigma),
'same'
)
self.im = im.astype('double')
self.shape = im.shape
def execute(paths):
threshold = get_threshold(paths)
experimental_map = mrcfile.open(paths['cleaned_map'], mode='r')
experimental_data = deepcopy(experimental_map.data)
# Remove low valued data and translate the higher values down to zero.
experimental_data[experimental_data < 0] = 0
# experimental_data = percentile_filter(experimental_data, numpy.shape(experimental_data), 5)
# Change all values < threshold to 0
experimental_data[experimental_data < threshold] = 0
# translate data to have min = 0
experimental_data[experimental_data > 0] -= threshold
# normalize data with percentile value
percentile = numpy.percentile(
experimental_data[numpy.nonzero(experimental_data)], 60)
experimental_data /= percentile
# Get rid of the very high-intensity voxels by setting them to 95-percentile
percentile_98 = numpy.percentile(
experimental_data[numpy.nonzero(experimental_data)], 98)
experimental_data[experimental_data > percentile_98] = percentile_98
# Print the normalized file to disk.
with mrcfile.new(paths['normalized_map'], overwrite=True) as mrc:
mrc.set_data(experimental_data)
mrc.header.origin = experimental_map.header.origin
mrc.close()
def run(mrcin, prefix=None):
f = mrcfile.open(mrcin)
if prefix is None: prefix = os.path.splitext(os.path.basename(mrcin))[0]
data = f.data
if data.ndim == 2: data = data.reshape(-1, *data.shape)
print "MRC file loaded"
print " shape = %s" % (data.shape,)
print " dtype = %s" % data.dtype
print
for i in xrange(data.shape[0]):
size2, size1 = data[i].shape # XXX really?
cbfout = "%s_%.3d.cbf"%(prefix, i+1)
print "Writing %s" % cbfout
cbf.save_numpy_data_as_cbf(data[i].flatten(), size1, size2,
"%s:%d"%(mrcin, i+1),
cbfout, pilatus_header="""
# Detector: %(detname)s
# Pixel_size %(pixelsize)e m x %(pixelsize)e m
# Wavelength %(wavelength)f A
# Detector_distance %(distance)f m
# Beam_xy (%(beamx)f, %(beamy)f) pixels
# Start_angle %(start_angle)%.4f deg.
# Angle_increment %(angle_inc).4f deg.
""" % dict(detname="????",
pixelsize=75.e-6,
wavelength=1,
distance=300.e-3,
beamx=size1/2., beamy=size2/2.,
start_angle=0, angle_inc=0))
def basicDVreader(image_path, n_channels=3, z_first=True):
''' very simple function to read .dv files as formatted by deltavision
microscopes.
image_path is the complete file path of the image
for deconvolved images, rolloff specifies the width of the border in pixels
to be cropped before further processing
n_channels (defualt 3) is the number of fluorescence and bright field
channels
z_first (default True); boolean, is the the order of the .dv tiff stack z-
first or channel-first (often, z_first = True for R3D_D3D,
z_first = False for R3D)
'''
with warnings.catch_warnings():
warnings.simplefilter("ignore")
with mrcfile.open(image_path, permissive=True) as dv:
dvData = dv.data[:]
dvShape = dvData.shape
nZslices = int(dvShape[0] / n_channels)
dvImage = np.zeros([n_channels, nZslices, dvShape[1], dvShape[2]],
dtype='uint16')
if z_first:
for channel in range(n_channels):
dvImage[channel, :, :, :] = dvData[channel *
nZslices:channel *
nZslices +
nZslices, :, :]
else:
for channel in range(n_channels):
dvImage[channel, :, :, :] = dvData[
channel::n_channels, :, :]
return dvImage
def write_mrc_from_atoms(
path: Path,
atoms: mda.AtomGroup,
path_out: Path,
context: float = 4.0,
cut_box=True,
keep_data=False,
):
"""mask a mrc map using an group of atoms"""
if not atoms:
logger.warning("Cannot crop empty atom selection. No file written")
return
with mrcfile.open(path) as mrc:
voxel, grid, origin, full_data = _get_mrc_properties(mrc)
data_mask = _create_voxel_mask(atoms,
grid,
origin,
voxel,
context,
symmetric=keep_data)
data = full_data * data_mask
if cut_box:
data, origin, voxel = _mrc_cutbox(data,
full_data,
origin,
voxel,
keep_full=keep_data)
with mrcfile.new(path_out, overwrite=True) as mrc_out:
mrc_out.set_data(data.transpose())
mrc_out.voxel_size = tuple(voxel.tolist())
mrc_out.header["origin"] = tuple(origin)
def read_pix_mrc(filename):
mrc = mrcfile.open(filename)
data = mrc.data
arr = np.zeros(shape=data.shape, dtype=np.float32)
arr[:] = data[:]
data = 0
return arr, mrc.voxel_size
def NoiseGenerator(self, idx):
self.args.ProjectionSize = int(self.args.ProjectionSize)
if self.args.UseEstimatedNoise == False:
image = torch.zeros(self.args.ProjectionSize,
self.args.ProjectionSize).normal_()
image = image.unsqueeze(0)
else:
if self.args.dataset == 'Betagal' or self.args.dataset == 'Betagal-Synthetic':
with mrcfile.open(self.BackgroundPath + str(idx).zfill(6) +
".mrc") as m:
image = np.array(m.data, dtype=np.float32)
if self.args.GaussianFilterProjection:
image = scipy.ndimage.gaussian_filter(
image, self.args.GaussianSigma)
image = Tensor(image).unsqueeze(0).cuda()
downsampling = image.shape[-1] // self.args.RawProjectionSize
if downsampling > 1:
image = torch.nn.functional.avg_pool2d(image,
kernel_size=downsampling,
stride=downsampling,
padding=0)
image = (image - image.mean((1, 2), keepdim=True)) / image.std(
(1, 2), keepdim=True)
return image
def save_mrcs(**args):
print('Converting mrcs to jpg....')
os.chdir(os.path.abspath(os.path.dirname(args['input']))) # navigate to the par dir of input file
try:
shutil.rmtree(args['output'])
except OSError:
pass
os.mkdir(args['output'])
os.mkdir(os.path.join(args['output'], 'data'))
avg_mrc = mrcfile.open(os.path.basename(args['input'])).data
if len(avg_mrc.shape) == 3:
num_part = avg_mrc.shape[0]
elif len(avg_mrc.shape) == 2:
num_part = 1
for i in range(num_part):
new_img = avg_mrc[i,:,:]
if np.sum(new_img) > 1e-7 or np.sum(new_img) < -1e-7:
new_img = cutbyradius(new_img)
new_img = ((new_img-new_img.min())/((new_img.max()-new_img.min())+1e-7)*255).astype('uint8')
new_img = Image.fromarray(new_img)
new_img = new_img.convert("L")
new_img.save(os.path.join(args['output'], 'data', (args['name'] + '_' + str(i+1) + '.jpg')))
def _read(self):
with mrcfile.open(self.filepath) as mrc:
im = mrc.data.astype('double')
# For multiple mrc files, mrcfile returns an ndarray with (shape n_images, height, width)
# swap axes 0 and 2 so we get the more natural (height, width, n_images)
if im.ndim == 3:
im = np.swapaxes(im, 0, 2)
self.original_im = im
# Discard outer pixels
im = im[self.margin_top:-self.margin_bottom if self.
margin_bottom is not None else None,
self.margin_left:-self.margin_right if self.
margin_right is not None else None]
if self.square:
side_length = min(im.shape)
im = im[:side_length, :side_length]
if self.shrink_factor is not None:
im = misc.imresize(im,
1 / self.shrink_factor,
mode='F',
interp='cubic')
if self.gauss_filter_size is not None:
im = signal.correlate(
im,
Micrograph.gaussian_filter(self.gauss_filter_size,
self.gauss_filter_sigma), 'same')
self.im = im.astype('double')
self.shape = im.shape
def read_mrc(self, mrcfilename=None):
if mrcfilename is not None:
self.mrcfilename = mrcfilename
with mrcfile.open(self.mrcfilename) as emd:
nx, ny, nz = emd.header['nx'], emd.header['ny'], emd.header['nz']
x0, y0, z0 = emd.header['origin']['x'], emd.header['origin']['y'],\
emd.header['origin']['z']
dx, dy, dz = emd.voxel_size['x'], emd.voxel_size[
'y'], emd.voxel_size['z']
xyz = numpy.meshgrid(numpy.arange(x0, x0 + nx * dx, dx),
numpy.arange(y0, y0 + ny * dy, dy),
numpy.arange(z0, z0 + nz * dz, dz),
indexing='ij')
xyz = numpy.asarray(xyz)
xyz = xyz.reshape(3, nx * ny * nz)
xyz = xyz.T
self.grid = emd.data.flatten(order='F').reshape(nx, ny, nz)
print('Reading density:')
print(self.grid.shape)
self.grid_coords = xyz.reshape(nx, ny, nz, 3)
self.grid_indices = numpy.indices(self.grid.shape)
# First to last
self.grid_indices = numpy.squeeze(self.grid_indices[...,
None].swapaxes(
0, -1))
assert dy == dx and dz == dx
self.step = dx
self.origin = numpy.asarray([x0, y0, z0])
def read_mrc(self):
"""Gets and preprocesses micrograph.
Reads the micrograph, applies binning and a low-pass filter.
Returns:
Micrograph image.
"""
with mrcfile.open(self.filename, mode='r+', permissive=True) as mrc:
im = mrc.data.astype('float')
# Discard outer pixels
im = im[config.apple.mrc.margin_top:-config.apple.mrc.margin_bottom,
config.apple.mrc.margin_left:-config.apple.mrc.margin_right]
# Make square
side_length = min(im.shape)
im = im[:side_length, :side_length]
im = misc.imresize(im,
1 / config.apple.mrc.shrink_factor,
mode='F',
interp='cubic')
im = signal.correlate(
im,
PickerHelper.gaussian_filter(config.apple.mrc.gauss_filter_size,
config.apple.mrc.gauss_filter_sigma),
'same')
return im.astype('double')
def test_rec():
data_expected1 = mrcfile.open("test/rec_expected_gpu.mrc").data
data_expected2 = mrcfile.open("test/rec_expected_cpu.mrc").data
data1 = mrcfile.open("test/rec_gpu.mrc").data
data2 = mrcfile.open("test/rec_cpu.mrc").data
diff1 = numpy.max(numpy.abs(data_expected1 - data1))
diff2 = numpy.max(numpy.abs(data_expected1 - data2))
from matplotlib import pylab
pylab.imshow((data1 - data2)[100, :, :])
pylab.show()
diff3 = numpy.max(numpy.abs(data1 - data2))
assert diff3 == pytest.approx(0)
assert diff1 == pytest.approx(0)
assert diff2 == pytest.approx(0)
def read_mrc(file):
"""
Read in a tomogram in MRC or REC format and return its data as a numpy array.
"""
with mrcfile.open(file, permissive=True) as m:
return m.data.astype(np.float32)
def CoordsBackground_Betagal_Std(pathCoords, pathMicrograph, threshold=False, NumberParticles=10, sizeParticle=384, downSample=1):
N=sizeParticle
M=2*N
with mrcfile.open(pathMicrograph, permissive=True) as image:
micrograph=torch.Tensor(image.data).cuda()
template=torch.ones( sizeParticle,sizeParticle).float().cuda()/(sizeParticle**2)
meanSquare= ConvolveTemplate(micrograph, template, downSample )**2
Std=ConvolveTemplate(micrograph**2, template, downSample)
heatmap=Std-meanSquare
heatmap=heatmap.cpu().numpy()
val=np.max(heatmap)
heatmap[:M,:]=val
heatmap[:,:M]=val
heatmap[:,-M:]=val
heatmap[-M:,:]=val
coords=np.zeros((NumberParticles,2))
for p in range(NumberParticles):
ind=aminArray(heatmap)
coords[p,0] = ind[1]
coords[p,1] = ind[0]
heatmap[ind[0]-sizeParticle//4 : ind[0]+sizeParticle//4 , ind[1]-sizeParticle//4 : ind[1]+sizeParticle//4]=val
return coords
def calculate_sphericity(inmrc): # read MRC inputmrc = (mrcfile.open(inmrc)).data inputmrc_copy = copy.deepcopy(inputmrc) extended_inputmrc = np.zeros((inputmrc.shape[0]+10,inputmrc.shape[1]+10,inputmrc.shape[2]+10),dtype=np.float) ## Had to extend it before Gaussian filter, else you might edge effects extended_inputmrc[6:6+inputmrc.shape[0], 6:6+inputmrc.shape[1], 6:6+inputmrc.shape[2]] = inputmrc_copy # Gaussian filtering # Sigma=1 works well blurred = gaussian_filter(extended_inputmrc,sigma=1) # Find surfaces using marching cube algorithm verts, faces, normals, values = measure.marching_cubes_lewiner(blurred,level=0.5) ## Fixed thresholded due to Gaussian blurring # Find surface area surface_area = measure.mesh_surface_area(verts,faces) # Find volume blurred[blurred >= 0.5] = 1 blurred[blurred < 0.5] = 0 volume = np.sum(blurred) # Calculate sphericity sphericity = (((pi)**(1/3))*((6*volume)**(2/3)))/(surface_area) return sphericity
def get_test_set(img_per_class): files = [] Y = [] for i in classes: for j in range(img_per_class): filename = '../data/SNR003/' + str(i) + '/tomotarget' + str(499-j) + '.mrc' files.append(filename) Y.append(classes.index(i)) count = 0 # print(files) while True: if count == img_per_class*10: count = 0 f = mrcfile.open(files[count]) x = np.asarray(f.data) # x = norm_3d(x) x = pad(x) x = np.expand_dims(x, axis = 0) x = np.expand_dims(x, axis = 4) y = Y[count] y_arr = np.zeros(10) y_arr[y] = 1 y_arr = np.expand_dims(y_arr, axis = 0) count += 1 yield x, y_arr
def read_mrc(filename):
mrc = mrcfile.open(filename)
data = mrc.data
arr = np.zeros(shape=data.shape, dtype=np.uint8)
arr[:] = data[:]
data = 0
return arr
def __init__(
self,
mrc,
pixelsize,
voltage,
spherical_abberation,
amplitude_contrast,
low_cutoff_res=30,
high_cutoff_res=5,
):
self.pixelsize = pixelsize
self.voltage = voltage
self.spherical_abberation = spherical_abberation
self.amplitude_contrast = amplitude_contrast
self.electron_wavelength = wavelength_from_voltage(voltage)
if type(mrc) == str:
with mrcfile.open(mrc, permissive=True) as f:
img = f.data
elif type(mrc) == np.ndarray:
img = mrc
self.spectrum = np.log(
np.abs(fft.rfft2(img, s=(max(img.shape), max(img.shape)))))
# keep a copy of the full spectrum
self.full_spectrum = self.spectrum
# reduce the spectrum to a desired range and subtract background
self.spectrum = self._preprocess_spectrum(self.spectrum,
low_cutoff_res,
high_cutoff_res)
def process_experimental_map(map_file, filter_res, contour_level):
"""Filter and resample experimental maps to given resolution."""
with mrcfile.open(map_file) as mrc:
pixel_size = mrc.voxel_size['x']
# Create temporary name
fnHash = createHash()
# Uncompress map
if map_file[-3:] == '.gz':
with mrcfile.open(map_file) as mrc:
V_exp = mrc.data.copy()
uncompressed_map = '%sExp.map'%fnHash
with mrcfile.new(uncompressed_map) as mrc:
mrc.set_data(V_exp)
else:
uncompressed_map = map_file
# Assume all pixel sizes are equal and take x dimension
with mrcfile.open(map_file) as mrc:
pixel_size = mrc.voxel_size['x']
# Resize to pixel size of 1A/pixel
ok = runJob("xmipp_image_resize -i %s -o %sResized.map --factor %f" %
(uncompressed_map, fnHash, pixel_size))
# Filter to specified resolution
if ok:
ok = runJob("xmipp_transform_filter -i %sResized.map -o %sFiltered.map "\
"--fourier low_pass %f --sampling 1"
% (fnHash, fnHash, filter_res))
# Get mask by thresholding to conout level provided
if ok:
ok = runJob("xmipp_transform_threshold -i %sResized.map -o %sMask.map "\
"--select below %f --substitute binarize -v 0" %
(fnHash, fnHash, contour_level))
# Set filtered volume and mask
if ok:
with mrcfile.open(fnHash + 'Filtered.map') as mrc:
Vf = mrc.data.copy()
with mrcfile.open(fnHash + 'Mask.map') as mrc:
Vmask = mrc_mask_to_binary(mrc.data.copy())
else:
Vf, Vmask = None, None
# Remove all temporary files produced
os.system("rm -f %s*" % fnHash)
return Vf, Vmask
def loader(imageblock):
if mmap is True:
mrc = mrcfile.mmap(image_path)
else:
mrc = mrcfile.open(image_path)
imageblock.data = mrc.data
pixel_size = structured_to_unstructured(mrc.voxel_size)[::-1]
imageblock.pixel_size = pixel_size
