def main():
"""Main function."""
args = parse_args()
syris.init(loglevel=logging.INFO, double_precision=args.double_precision)
units = q.Quantity(1, args.units)
triangles = make_cube(
).magnitude if args.input is None else read_blender_obj(args.input)
triangles = triangles * units
tr = geom.Trajectory([(0, 0, 0)] * units)
mesh = Mesh(triangles,
tr,
center=args.center,
iterations=args.supersampling)
LOG.info('Number of triangles: {}'.format(mesh.num_triangles))
shape = (args.n, args.n)
if args.pixel_size is None:
if args.input is None:
fov = 4. * units
else:
# Maximum sample size in x and y direction
max_diff = np.max(mesh.extrema[:-1, 1] - mesh.extrema[:-1, 0])
fov = max_diff
fov *= args.margin
args.pixel_size = fov / args.n
else:
fov = args.n * args.pixel_size
if args.translate is None:
translate = (fov.simplified.magnitude / 2.,
fov.simplified.magnitude / 2., 0) * q.m
else:
translate = (args.translate[0].simplified.magnitude,
args.translate[1].simplified.magnitude, 0) * q.m
LOG.info('Translation: {}'.format(translate.rescale(q.um)))
mesh.translate(translate)
mesh.rotate(args.y_rotate, geom.Y_AX)
mesh.rotate(args.x_rotate, geom.X_AX)
fmt = 'n: {}, pixel size: {}, FOV: {}'
LOG.info(
fmt.format(args.n, args.pixel_size.rescale(q.um), fov.rescale(q.um)))
st = time.time()
proj = mesh.project(shape, args.pixel_size, t=None).get()
LOG.info('Duration: {} s'.format(time.time() - st))
offset = (0, translate[1].simplified, -(fov / 2.).simplified) * q.m
if args.projection_filename is not None:
save_image(args.projection_filename, proj)
if args.compute_slice:
sl = mesh.compute_slices((1, ) + shape, args.pixel_size,
offset=offset).get()[0]
if args.slice_filename is not None:
save_image(args.slice_filename, sl)
show(sl, title='Slice at y = {}'.format(args.n / 2))
show(proj, title='Projection')
plt.show()
def main():
args = parse_args()
syris.init()
prg = cl.Program(cfg.OPENCL.ctx, get_kernel()).build()
if len(args.k) == 1:
complexities = args.k
else:
complexities = np.arange(args.k[0], args.k[1] + args.k[2], args.k[2])
print 'Complexities: {}'.format(complexities)
results = []
for complexity in complexities:
runs = []
for i in range(args.runs):
print 'Run {} / {}'.format(i + 1, args.runs)
runs.append(run(args.n, args.m, complexity, prg, verbose=args.verbose))
if args.output:
np.save(args.output.format(complexity), runs)
results.append(np.mean(runs))
print
print '==============================='
for i, result in enumerate(results):
print 'Complexity: {:.2f}, speedup: {:.2f}'.format(complexities[i], result)
print '==============================='
if args.plot:
plt.figure()
plt.plot(complexities, results)
plt.xlabel('Complexity')
plt.xlabel('Speedup')
plt.grid()
plt.show()
def test_init():
syris.init(profiling=True, loglevel=logging.DEBUG, double_precision=True)
assert logging.DEBUG == syris.physics.LOG.getEffectiveLevel()
assert cfg.OPENCL.ctx is not None
assert cfg.PRECISION.cl_float == 8
assert syris.profiling.PROFILER is not None
assert cfg.PRECISION.vfloat2 == cl_array.vec.double2
def make_topo_tomo_flat(args, highspeed=True, scintillator=None):
syris.init(device_index=0, loglevel='INFO')
dimax = make_pco_dimax()
n = dimax.shape[0]
energies = np.arange(5, 30) * q.keV
bm, detector = make_devices(n, energies, camera=dimax, highspeed=highspeed,
scintillator=scintillator)
# Customize the setup for the 2013_03_07-08 experiment
air = MaterialFilter(1 * q.m, get_material('air_5_30_kev.mat'))
filters = [air]
dimax.bpp = 32
dimax.dtype = np.float32
dimax.fps = 450 / q.s
detector.lens.f_number = 2.8
bm.el_current = 130 * q.mA
# Compte the flat field
flat = get_flat(dimax.shape, energies, detector, bm, filters=filters, shot_noise=True,
amplifier_noise=True)
fmt = 'min: {}, max: {}, mean: {}, middle row std: {}'
print fmt.format(flat.min(), flat.max(), flat.mean(), flat[n / 2].std())
show(flat)
plt.show()
return flat
def main():
args = parse_args()
syris.init(profiling=True)
prg = cl.Program(cfg.OPENCL.ctx, get_kernel()).build()
if len(args.k) == 1:
complexities = args.k
else:
complexities = np.arange(args.k[0], args.k[1] + args.k[2], args.k[2])
print("Complexities: {}".format(complexities))
results = []
for complexity in complexities:
runs = []
for i in range(args.runs):
print("Run {} / {}".format(i + 1, args.runs))
runs.append(run(args.n, args.m, complexity, prg, verbose=args.verbose))
if args.output:
np.save(args.output.format(complexity), runs)
results.append(np.mean(runs))
print()
print("===============================")
for i, result in enumerate(results):
print("Complexity: {:.2f}, speedup: {:.2f}".format(complexities[i], result))
print("===============================")
if args.plot:
plt.figure()
plt.plot(complexities, results)
plt.xlabel("Complexity")
plt.xlabel("Speedup")
plt.grid()
plt.show()
def main():
args = parse_args()
syris.init()
n = 32
ps = 1 * q.um
energies = np.arange(5, 30) * q.keV
energy = 10 * q.keV
lam = energy_to_wavelength(energy)
# Delta causes phase shift between two adjacent pixels by 2 Pi
delta = (lam / ps).simplified.magnitude
ri = np.ones_like(energies.magnitude, dtype=np.complex) * delta + 0j
material = Material("dummy", ri, energies)
fmt = "Computing with n: {:>4}, pixel size: {}"
wedge = np.tile(np.arange(n), [n, 1]) * ps
# Non-supersampled object shape causes phase shifts 0, 2Pi, 4Pi, ..., thus the phase is constant
# as an extreme result of aliasing
print(fmt.format(n, ps))
u = compute_transmission_function(n, ps, 1, energy, material)
# Supersampling helps resolve the transmission function
print(fmt.format(n * args.supersampling, ps / args.supersampling))
u_s = compute_transmission_function(n, ps, args.supersampling, energy,
material)
show(wedge.magnitude, title="Projected Object [um]")
show(u.real, title="Re[T(x, y)]")
show(u_s.real, title="Re[T(x, y)] Supersampled")
plt.show()
def setUp(self):
syris.init(device_index=0)
self.data = np.arange(10).astype(cfg.PRECISION.np_float)
self.mem = cl.Buffer(cfg.OPENCL.ctx,
cl.mem_flags.READ_WRITE
| cl.mem_flags.COPY_HOST_PTR,
hostbuf=self.data)
def setUp(self):
syris.init(double_precision=True, device_index=0)
self.energy = 20 * q.keV
self.lam = 6.19920937165e-11 * q.m
self.size = 64
self.distance = 1 * q.m
self.pixel_size = 1 * q.um
def main():
parser = get_default_parser(__doc__)
subparsers = parser.add_subparsers(help='sub-command help')
manual = subparsers.add_parser(
'manual', help='Manual positioning via simple transformations')
trajectory = subparsers.add_parser(
'trajectory', help='Automatic positioning via trajectories')
subtrajectories = subparsers.add_parser('subtrajectories',
help='Automatic positioning with '
'local sub-body trajectories')
manual.set_defaults(_func=make_manual_sequence)
trajectory.set_defaults(_func=make_trajectory_sequence)
subtrajectories.add_argument(
'--t',
type=float,
help='Time at which to compute the projection normalized to '
'[0, 1], if not specified, complete sequence is shown')
subtrajectories.set_defaults(_func=make_complex_trajectory_sequence)
args = parser.parse_args()
syris.init(device_index=0)
# Set constants
args.n = 512
args.shape = (args.n, args.n)
args.ps = 1 * q.um
args._func(args)
def test_no_opencl_init():
"""Initialization by broken OpenCL must work too, just the context and profiling not."""
cl.get_platforms = lambda: None
syris.init(profiling=False, loglevel=logging.DEBUG, double_precision=True)
assert logging.DEBUG == syris.physics.LOG.getEffectiveLevel()
assert cfg.PRECISION.cl_float == 8
assert cfg.PRECISION.vfloat2 == cl_array.vec.double2
def main():
args = parse_args()
syris.init()
n = 1024
d = args.propagation_distance * q.m
shape = (n, n)
ps = 1 * q.um
energy = 20 * q.keV
tr = Trajectory([(n / 2, n / 2, 0)] * ps, pixel_size=ps)
sample = make_sphere(n, n / 30 * ps, pixel_size=ps, material=get_material('air_5_30_kev.mat'))
bm = make_topotomo(pixel_size=ps, trajectory=tr)
print 'Source size FWHM (height x width): {}'.format(bm.size.rescale(q.um))
u = bm.transfer(shape, ps, energy, t=0 * q.s)
u = sample.transfer(shape, ps, energy)
intensity = propagate([sample], shape, [energy], d, ps).get()
incoh = bm.apply_blur(intensity, d, ps).get()
region = (n / 4, n / 4, n / 2, n / 2)
intensity = ip.crop(intensity, region).get()
incoh = ip.crop(incoh, region).get()
show(intensity, title='Coherent')
show(incoh, title='Applied source blur')
plt.show()
def main():
"""main"""
args = parse_args()
n = 256
ps = 10 * q.um
syris.init()
mb = create_sample(n, ps)
mb.bind_trajectory(ps)
tr = mb.trajectory
print 'Length: {}, time: {}'.format(tr.length.rescale(q.mm), tr.time)
plt.figure()
plt.plot(tr.points[0].rescale(q.um), tr.points[1].rescale(q.um))
plt.title('Trajectory')
times, points = get_diffs(mb, ps)
if args.output is not None:
if not os.path.exists(args.output):
os.makedirs(args.output, mode=0o755)
for i, t in enumerate(times):
mb.clear_transformation()
proj = mb.project((n, n), ps, t=t).get()
scipy.misc.imsave(os.path.join(args.output, 'projection_{:>04}.tif'.format(i)), proj)
plt.show()
def main():
args = parse_args()
syris.init()
n = 32
ps = 1 * q.um
energies = np.arange(5, 30) * q.keV
energy = 10 * q.keV
lam = energy_to_wavelength(energy)
# Delta causes phase shift between two adjacent pixels by 2 Pi
delta = (lam / ps).simplified.magnitude
ri = np.ones_like(energies.magnitude, dtype=np.complex) * delta + 0j
material = Material('dummy', ri, energies)
fmt = 'Computing with n: {:>4}, pixel size: {}'
wedge = np.tile(np.arange(n), [n, 1]) * ps
# Non-supersampled object shape causes phase shifts 0, 2Pi, 4Pi, ..., thus the phase is constant
# as an extreme result of aliasing
print fmt.format(n, ps)
u = compute_transmission_function(n, ps, 1, energy, material)
# Supersampling helps resolve the transmission function
print fmt.format(n * args.supersampling, ps / args.supersampling)
u_s = compute_transmission_function(n, ps, args.supersampling, energy, material)
show(wedge.magnitude, title='Projected Object [um]')
show(u.real, title='Re[T(x, y)]')
show(u_s.real, title='Re[T(x, y)] Supersampled')
plt.show()
def test_fft(self):
data = gpu_util.get_array(np.random.normal(100, 100,
size=(4, 4)).astype(cfg.PRECISION.np_float))
orig = gpu_util.get_host(data)
data = ip.fft_2(data)
ip.ifft_2(data)
np.testing.assert_almost_equal(orig, data.get().real, decimal=4)
# With a plan
from pyfft.cl import Plan
plan = Plan((4, 4), queue=cfg.OPENCL.queue)
data = ip.fft_2(np.copy(orig), plan=plan)
ip.ifft_2(data, plan=plan)
np.testing.assert_almost_equal(orig, data.get().real, decimal=4)
# Test double precision
syris.init(double_precision=True, device_index=0)
data = gpu_util.get_array(np.random.normal(100, 100,
size=(4, 4)).astype(cfg.PRECISION.np_float))
gt = np.fft.fft2(data.get())
data = ip.fft_2(data)
np.testing.assert_almost_equal(gt, data.get(), decimal=4)
gt = np.fft.ifft2(data.get())
data = ip.ifft_2(data)
np.testing.assert_almost_equal(gt, data.get(), decimal=4)
def setUp(self):
syris.init(double_precision=True, device_index=0)
self.energy = 20 * q.keV
self.lam = 6.19920937165e-11 * q.m
self.size = 64
self.distance = 1 * q.m
self.pixel_size = 1 * q.um
def main():
args = parse_args()
syris.init(device_index=0)
m = 20
if args.input == 'grid':
image = make_grid(args.n, m * q.m).thickness.get()
elif args.input == 'lena':
from scipy.misc import lena
image = lena().astype(cfg.PRECISION.np_float)
if args.n != image.shape[0]:
image = gutil.get_host(ip.rescale(image, (args.n, args.n)))
n = image.shape[0]
crop_n = n - 2 * m - 2
y, x = np.mgrid[-n / 2:n / 2, -n / 2:n / 2]
# Compute a such that the disk diameter is exactly the period when distance from the middle is n
# / 2
a = m / (2 * (crop_n / 2.) ** 2)
radii = (a * np.sqrt(x ** 2 + y ** 2) ** 2 + 1e-3).astype(cfg.PRECISION.np_float)
x_param = radii
y_param = radii
result = ip.varconvolve_disk(image, (y_param, x_param)).get()
result = ip.crop(result, (m - 1, m - 1, crop_n, crop_n)).get()
radii = ip.crop(radii, (m - 1, m - 1, crop_n, crop_n)).get()
image = ip.crop(image, (m - 1, m - 1, crop_n, crop_n)).get()
if args.output:
save_image(args.output, result)
show(image, title='Original Image')
show(2 * radii, title='Blurring Disk Diameters')
show(result, title='Blurred Image')
plt.show()
def test_no_opencl_init():
"""Initialization by broken OpenCL must work too, just the context and profiling not."""
cl.get_platforms = lambda: None
syris.init(profiling=False, loglevel=logging.DEBUG, double_precision=True)
assert logging.DEBUG == syris.physics.LOG.getEffectiveLevel()
assert cfg.PRECISION.cl_float == 8
assert cfg.PRECISION.vfloat2 == cl_array.vec.double2
def test_init():
syris.init(profiling=True, loglevel=logging.DEBUG, double_precision=True)
assert logging.DEBUG == syris.physics.LOG.getEffectiveLevel()
assert cfg.OPENCL.ctx is not None
assert cfg.PRECISION.cl_float == 8
assert syris.profiling.PROFILER is not None
assert cfg.PRECISION.vfloat2 == cl_array.vec.double2
def main():
args = parse_args()
syris.init()
n = 1024
d = args.propagation_distance * q.m
shape = (n, n)
ps = 1 * q.um
energy = 20 * q.keV
tr = Trajectory([(n / 2, n / 2, 0)] * ps, pixel_size=ps)
sample = make_sphere(n,
n / 30 * ps,
pixel_size=ps,
material=get_material('air_5_30_kev.mat'))
bm = make_topotomo(pixel_size=ps, trajectory=tr)
print 'Source size FWHM (height x width): {}'.format(bm.size.rescale(q.um))
u = bm.transfer(shape, ps, energy, t=0 * q.s)
u = sample.transfer(shape, ps, energy)
intensity = propagate([sample], shape, [energy], d, ps).get()
incoh = bm.apply_blur(intensity, d, ps).get()
region = (n / 4, n / 4, n / 2, n / 2)
intensity = ip.crop(intensity, region).get()
incoh = ip.crop(incoh, region).get()
show(intensity, title='Coherent')
show(incoh, title='Applied source blur')
plt.show()
def main():
parser = get_default_parser(__doc__)
subparsers = parser.add_subparsers(help="sub-command help",
dest="sub-commands",
required=True)
manual = subparsers.add_parser(
"manual", help="Manual positioning via simple transformations")
trajectory = subparsers.add_parser(
"trajectory", help="Automatic positioning via trajectories")
subtrajectories = subparsers.add_parser("subtrajectories",
help="Automatic positioning with "
"local sub-body trajectories")
manual.set_defaults(_func=make_manual_sequence)
trajectory.set_defaults(_func=make_trajectory_sequence)
subtrajectories.add_argument(
"--t",
type=float,
help="Time at which to compute the projection normalized to "
"[0, 1], if not specified, complete sequence is shown",
)
subtrajectories.set_defaults(_func=make_complex_trajectory_sequence)
args = parser.parse_args()
syris.init(device_index=0)
# Set constants
args.n = 512
args.shape = (args.n, args.n)
args.ps = 1 * q.um
args._func(args)
def main():
args = parse_args()
syris.init(device_index=0)
m = 20
if args.input == 'grid':
image = make_grid(args.n, m * q.m).thickness.get()
elif args.input == 'lena':
from scipy.misc import lena
image = lena().astype(cfg.PRECISION.np_float)
if args.n != image.shape[0]:
image = gutil.get_host(ip.rescale(image, (args.n, args.n)))
n = image.shape[0]
crop_n = n - 2 * m - 2
y, x = np.mgrid[-n / 2:n / 2, -n / 2:n / 2]
# Compute a such that the disk diameter is exactly the period when distance from the middle is n
# / 2
a = m / (2 * (crop_n / 2.)**2)
radii = (a * np.sqrt(x**2 + y**2)**2 + 1e-3).astype(cfg.PRECISION.np_float)
x_param = radii
y_param = radii
result = ip.varconvolve_disk(image, (y_param, x_param)).get()
result = ip.crop(result, (m - 1, m - 1, crop_n, crop_n)).get()
radii = ip.crop(radii, (m - 1, m - 1, crop_n, crop_n)).get()
image = ip.crop(image, (m - 1, m - 1, crop_n, crop_n)).get()
if args.output:
save_image(args.output, result)
show(image, title='Original Image')
show(2 * radii, title='Blurring Disk Diameters')
show(result, title='Blurred Image')
plt.show()
def main():
"""main"""
syris.init(double_precision=True)
n = 512
ps = 0.5 * q.um
energy = 10 * q.keV
lam = energy_to_wavelength(energy)
# Compute the sampling limit for given n, ps and lam
ca = (lam / 2 / ps).simplified.magnitude
tga = np.tan(np.arccos(ca))
distance = (tga * n * ps / 2).simplified
print 'Propagation distance:', distance
propagator = compute_propagator(n, distance, lam, ps, apply_phase_factor=True,
mollified=False).get()
full_propagator = compute_propagator(n, distance, lam, ps, fresnel=False, mollified=False).get()
np_propagator = compute_fourier_propagator(n, lam, distance, ps)
np_full_propagator = compute_fourier_propagator(n, lam, distance, ps, fresnel=False)
diff = propagator - np_propagator
full_diff = full_propagator - np_full_propagator
show(np.fft.fftshift(propagator.real), 'Syris Fresnel Propagator (Real Part)')
show(np.fft.fftshift(np_propagator.real), 'Numpy Fresnel propagator (Real Part)')
show(np.fft.fftshift(diff.real), 'Fresnel Syris - Fresnel Numpy (Real Part)')
show(np.fft.fftshift(full_propagator.real), 'Syris Full Propagator (Real Part)')
show(np.fft.fftshift(np_full_propagator.real), 'Numpy Full propagator (Real Part)')
show(np.fft.fftshift(full_diff.real), 'Full Syris - Full Numpy (Real Part)')
plt.show()
def setUp(self):
syris.init(device_index=0)
energies = range(10, 20) * q.keV
self.energy = energies[len(energies) / 2]
self.material = Material('foo',
np.arange(len(energies), dtype=np.complex),
energies)
def process(args, device_index):
import syris
from syris.geometry import Trajectory
from syris.bodies.mesh import Mesh, read_blender_obj
syris.init(device_index=device_index,
logfile=args.logfile,
double_precision=args.double_precision)
path, ext = os.path.splitext(args.input)
if ext == ".obj":
tri = read_blender_obj(args.input)
else:
tri = np.load(args.input)
tri = tri * q.um
tr = Trajectory([(0, 0, 0)] * q.um)
mesh = Mesh(tri, tr, center=None, iterations=args.supersampling_projection)
if args.n:
n = args.n
fov = n * args.pixel_size
else:
fov = max([ends[1] - ends[0] for ends in mesh.extrema[:-1]]) * 1.1
n = int(np.ceil((fov / args.pixel_size).simplified.magnitude))
shape = (n, n)
if args.make_gt:
LOG.info("--- Args info ---")
log_attributes(args)
return make_ground_truth(args, shape, mesh)
else:
num_projs = int(
np.pi *
n) if args.num_projections is None else args.num_projections
angles = np.linspace(0, args.rotation_angle, num_projs,
endpoint=False) * q.deg
if device_index == 0:
LOG.info("n: {}, ps: {}, FOV: {}".format(n, args.pixel_size, fov))
LOG.info("Total rotation angle: {} deg".format(
args.rotation_angle))
LOG.info("Number of projections: {}".format(num_projs))
LOG.info("--- Mesh info ---")
log_attributes(mesh)
LOG.info("--- Args info ---")
log_attributes(args)
return scan(
shape,
args.pixel_size,
args.rotation_axis,
mesh,
angles,
args.prefix,
lamino_angle=args.lamino_angle,
index=device_index,
num_devices=args.num_devices,
ss=args.supersampling,
)
def make_motion(args):
syris.init()
n = 256
shape = (n, n)
energies = np.arange(5, 30, 1) * q.keV
bm, detector = make_devices(n, energies)
mb = create_sample(n, detector.pixel_size, velocity=20 * q.mm / q.s)
mb_2 = create_sample(n, detector.pixel_size, velocity=10 * q.mm / q.s)
mb.material = get_material('pmma_5_30_kev.mat')
mb_2.material = mb.material
cube = make_cube() / q.m * 30 * detector.pixel_size + 0.1 * detector.pixel_size
fov = detector.pixel_size * n
circle = make_circle().magnitude * fov / 30000 + fov / 2
tr = Trajectory(circle, velocity=10 * q.um / q.s)
glass = get_material('glass.mat')
mesh = Mesh(cube, tr, material=glass)
ex = Experiment([bm, mb, mb_2, mesh], bm, detector, 0 * q.m, energies)
for sample in ex.samples:
if sample != bm:
sample.trajectory.bind(detector.pixel_size)
if args.show_flat:
show(get_flat(shape, energies, detector, bm), title='Counts')
plt.show()
if args.conduct:
if args.output is not None and not os.path.exists(args.output):
os.makedirs(args.output, mode=0o755)
t_0 = 0 * q.s
if args.num_images:
t_1 = args.num_images / detector.camera.fps
else:
t_1 = ex.time
st = time.time()
mpl_im = None
for i, proj in enumerate(ex.make_sequence(t_0, t_1)):
image = get_host(proj)
if args.show:
if mpl_im is None:
plt.figure()
mpl_im = plt.imshow(image)
plt.show(False)
else:
mpl_im.set_data(image)
plt.draw()
if args.output:
path = os.path.join(args.output, 'projection_{:>05}.png').format(i)
scipy.misc.imsave(path, image)
print 'Maximum intensity:', image.max()
print 'Duration: {} s'.format(time.time() - st)
plt.show()
def setUp(self):
syris.init(device_index=0)
self.pixel_size = 1e-3
self.precision_places = int(np.log10(1 / self.pixel_size))
self.prg = g_util.get_program(g_util.get_metaobjects_source())
self.poly_deg = 4
self.roots_mem = cl.Buffer(cfg.OPENCL.ctx, cl.mem_flags.READ_WRITE,
size=(self.poly_deg + 1) * cfg.PRECISION.cl_float)
def default_syris_init(double_precision=False, profiling=False):
syris.init(
device_type=cl.device_type.CPU,
device_index=0,
double_precision=double_precision,
profiling=profiling,
loglevel=logging.CRITICAL,
)
def setUp(self):
syris.init(device_index=0)
self.pixel_size = 1 * q.um
control_points = get_linear_points(geom.X, start=(1, 1, 1))
traj = Trajectory(control_points, velocity=1 * q.mm / q.s)
self.metaball = MetaBall(traj, 1 * q.mm)
self.metaball_2 = MetaBall(Trajectory(get_linear_points(geom.Z)), 2 * q.mm)
self.composite = CompositeBody(traj, bodies=[self.metaball, self.metaball_2])
def setUp(self):
syris.init(device_index=0)
self.energies = np.arange(10, 20) * q.keV
self.energy = 15 * q.keV
delta = np.linspace(1e-5, 1e-6, len(self.energies))
beta = np.linspace(1e-8, 1e-9, len(self.energies))
self.material = Material('foo', delta + beta * 1j, self.energies)
self.thickness = 1 * q.mm
self.fltr = MaterialFilter(self.thickness, self.material)
def setUp(self):
syris.init(device_index=0)
self.energies = np.arange(10, 20) * q.keV
self.energy = 15 * q.keV
delta = np.linspace(1e-5, 1e-6, len(self.energies))
beta = np.linspace(1e-8, 1e-9, len(self.energies))
self.material = Material('foo', delta + beta * 1j, self.energies)
self.thickness = 1 * q.mm
self.fltr = MaterialFilter(self.thickness, self.material)
def setUp(self):
syris.init(device_index=0)
self.pixel_size = 1e-3
self.precision_places = int(np.log10(1 / self.pixel_size))
self.prg = g_util.get_program(g_util.get_metaobjects_source())
self.poly_deg = 4
self.roots_mem = cl.Buffer(cfg.OPENCL.ctx,
cl.mem_flags.READ_WRITE,
size=(self.poly_deg + 1) *
cfg.PRECISION.cl_float)
def setUp(self):
# Double precision needed for spherical phase profile
syris.init(double_precision=True, device_index=0)
self.dE = 0.1 * q.keV
self.energies = np.arange(14.8, 15, self.dE.magnitude) * q.keV
self.trajectory = Trajectory([(0, 0, 0)] * q.m)
self.ps = 10 * q.um
self.source = BendingMagnet(2.5 * q.GeV, 150 * q.mA, 1.5 * q.T, 30 * q.m,
self.dE, np.array([0.2, 0.8]) * q.mm, self.ps,
self.trajectory)
def test_simple():
syris.init(device_index=0)
n = 8
ps = 1 * q.um
thickness = np.arange(n**2).reshape(n, n).astype(
cfg.PRECISION.np_float) * q.m
go = StaticBody(thickness, ps)
# Same
projection = go.project((n, n), ps).get()
np.testing.assert_almost_equal(thickness.magnitude, projection)
# Cropped upsampled
shape = (n, n)
gt = rescale(thickness.magnitude, shape).get()
projection = go.project(shape, ps / 2).get()
gt = rescale(crop(thickness.magnitude, (0, 0, n / 2, n / 2)), shape).get()
np.testing.assert_almost_equal(gt, projection)
# Cropped downsampled
shape = (n / 4, n / 4)
gt = rescale(thickness.magnitude, shape).get()
projection = go.project(shape, 2 * ps).get()
gt = rescale(crop(thickness.magnitude, (0, 0, n / 2, n / 2)), shape).get()
np.testing.assert_almost_equal(gt, projection)
# Padded upsampled
shape = (4 * n, 4 * n)
projection = go.project(shape, ps / 2, offset=(-n / 2, -n / 2) * ps).get()
gt = rescale(pad(thickness.magnitude, (n / 2, n / 2, 2 * n, 2 * n)),
shape).get()
np.testing.assert_almost_equal(gt, projection)
# Padded downsampled
shape = (n, n)
projection = go.project(shape, 2 * ps, offset=(-n / 2, -n / 2) * ps).get()
gt = rescale(pad(thickness.magnitude, (4, 4, 2 * n, 2 * n)), shape).get()
np.testing.assert_almost_equal(gt, projection)
# Crop and pad and upsample
def crop_pad_rescale(ss):
shape = (n, n)
target_ps = ps / ss
fov = shape * ps
offset = (2, -2) * q.um
shape = (int(n / 2 * ss), int(ss * 3 * n / 2))
projection = go.project(shape, target_ps, offset=offset).get()
gt = rescale(
pad(thickness[n / 4:3 * n / 4, :], (0, n / 4, n / 2, 3 * n / 2)),
shape).get()
np.testing.assert_almost_equal(gt, projection)
crop_pad_rescale(2)
crop_pad_rescale(0.5)
def setUp(self):
syris.init(device_index=0)
self.prg = g_util.get_program(
g_util.get_source(["polyobject.cl",
"heapsort.cl"],
precision_sensitive=True))
self.num = 10
self.data = np.array([1, 8, np.nan, -1, np.nan, 8, 680, 74, 2, 0]).\
astype(cfg.PRECISION.np_float)
self.mem = cl.Buffer(cfg.OPENCL.ctx, cl.mem_flags.READ_WRITE |
cl.mem_flags.COPY_HOST_PTR, hostbuf=self.data)
def setUp(self):
syris.init(device_index=0)
self.num_0 = np.array([17 - 38j], dtype=cfg.PRECISION.np_cplx)
self.num_1 = np.array([-135 + 563j], dtype=cfg.PRECISION.np_cplx)
self.mem_0 = cl.Buffer(cfg.OPENCL.ctx, cl.mem_flags.READ_WRITE |
cl.mem_flags.COPY_HOST_PTR, hostbuf=self.num_0)
self.mem_1 = cl.Buffer(cfg.OPENCL.ctx, cl.mem_flags.READ_WRITE |
cl.mem_flags.COPY_HOST_PTR, hostbuf=self.num_1)
self.mem_out = cl.Buffer(cfg.OPENCL.ctx, cl.mem_flags.READ_WRITE, cfg.PRECISION.cl_cplx)
self.host_array = np.empty(1, cfg.PRECISION.np_cplx)
src = gpu_util.get_source(["vcomplex.cl"])
self.prg = cl.Program(cfg.OPENCL.ctx, src).build()
def setUp(self):
syris.init(device_index=0)
self.prg = g_util.get_program(
g_util.get_source(["polyobject.cl", "heapsort.cl"],
precision_sensitive=True))
self.num = 10
self.data = np.array([1, 8, np.nan, -1, np.nan, 8, 680, 74, 2, 0]).\
astype(cfg.PRECISION.np_float)
self.mem = cl.Buffer(cfg.OPENCL.ctx,
cl.mem_flags.READ_WRITE
| cl.mem_flags.COPY_HOST_PTR,
hostbuf=self.data)
def main():
args = parse_args()
syris.init(device_index=0)
shape = (args.n, args.n)
pixel_size = 1 * q.um
if args.method == "random":
# Random metaballs creation
metaballs, objects_all = create_metaballs_random(
args.n,
pixel_size,
args.num,
args.min_radius,
args.max_radius,
distance_from_center=args.distance_from_center,
)
elif args.method == "file":
# 1e6 because packing converts to meters
values = np.fromfile(args.input, dtype=np.float32) * 1e6
metaballs, objects_all = create_metaballs(
values.reshape(len(values) // 4, 4), pixel_size)
else:
distance = args.distance or args.n / 4
positions = [
(args.n / 2 - distance, args.n / 2, 0, args.n / 6),
(args.n / 2 + distance, args.n / 2, 0, args.n / 6),
]
metaballs, objects_all = create_metaballs(positions, pixel_size)
if args.output:
with open(args.output, mode="wb") as out_file:
out_file.write(objects_all)
z_min, z_max = get_z_range(metaballs)
print("z min, max:", z_min.rescale(q.um), z_max.rescale(q.um),
args.n * pixel_size + z_min)
if args.algorithm == "fast":
traj = Trajectory([(0, 0, 0)] * q.m)
comp = MetaBalls(traj, metaballs)
thickness = comp.project(shape, pixel_size).get()
else:
print("Z steps:",
int(((z_max - z_min) / pixel_size).simplified.magnitude + 0.5))
thickness = project_metaballs_naive(metaballs, shape,
make_tuple(pixel_size)).get()
if args.output_thickness:
imageio.imwrite(args.output_thickness, thickness)
show(thickness)
plt.show()
def main():
args = parse_args()
syris.init()
# Propagate to 20 cm
d = 5 * q.cm
# Compute grid
n_camera = 256
n = n_camera * args.supersampling
shape = (n, n)
material = get_material("pmma_5_30_kev.mat")
energy = 15 * q.keV
ps = 1 * q.um
ps_hd = ps / args.supersampling
radius = n / 4.0 * ps_hd
fmt = " Wavelength: {}"
print(fmt.format(energy_to_wavelength(energy)))
fmt = "Pixel size used for propagation: {}"
print(fmt.format(ps_hd.rescale(q.um)))
print(" Field of view: {}".format(n *
ps_hd.rescale(q.um)))
fmt = " Sphere diameter: {}"
print(fmt.format(2 * radius))
sample = make_sphere(n, radius, pixel_size=ps_hd, material=material)
projection = sample.project((n, n), ps_hd).get() * 1e6
projection = decimate(projection, (n_camera, n_camera), average=True).get()
# Propagation with a monochromatic plane incident wave
hd = propagate([sample], shape, [energy], d, ps_hd).get()
ld = decimate(hd, (n_camera, n_camera), average=True).get()
kernel = compute_tie_kernel(n_camera, ps, d, material, energy)
mju = material.get_attenuation_coefficient(energy).rescale(1 /
q.m).magnitude
f_ld = fft_2(ld)
f_ld *= get_array(kernel.astype(cfg.PRECISION.np_float))
retrieved = ifft_2(f_ld).get().real
retrieved = -1 / mju * np.log(retrieved) * 1e6
if args.output_thickness:
imageio.imwrite(args.output_thickness, projection)
if args.output_projection:
imageio.imwrite(args.output_projection, ld)
if args.output_retrieved:
imageio.imwrite(args.output_retrieved, retrieved)
show(hd, title="High resolution")
show(ld, title="Low resolution (detector)")
show(retrieved, title="Retrieved [um]")
show(projection, title="Projection [um]")
show(projection - retrieved, title="Projection - retrieved")
plt.show()
def setUp(self):
syris.init(device_index=0)
wavelengths = np.arange(10) * q.nm
qe = np.ones(len(wavelengths))
self.camera = Camera(1e-3 * q.um,
1.0,
10.0,
0,
10, (64, 64),
wavelengths=wavelengths,
quantum_efficiencies=qe,
exp_time=1 * q.s,
fps=1 / q.s)
def setUp(self):
syris.init(device_index=0)
self.data = []
sizes = [8, 32]
tile_counts = [2, 4]
for j in range(len(sizes)):
for i in range(len(sizes)):
size = sizes[j], sizes[i]
for t_j in range(len(tile_counts)):
for t_i in range(len(tile_counts)):
tiles_count = tile_counts[t_j], tile_counts[t_i]
self.data.append((size, tiles_count))
def main():
syris.init()
energies = np.arange(10, 30) * q.keV
n = 1024
pixel_size = 0.4 * q.um
distance = 2 * q.m
material = make_henke('PMMA', energies)
sample = make_sphere(n, n / 4 * pixel_size, pixel_size, material=material)
image = propagate([sample], (n, n), energies, distance, pixel_size).get()
show(image)
plt.show()
def main():
args = parse_args()
syris.init()
n = 1024
shape = (n, n)
ps = 1 * q.um
tr = Trajectory([(n / 2, n / 2, 0)] * ps, pixel_size=ps)
energy_center = args.energy_center * q.keV
fwhm = args.energy_resolution * energy_center
sigma = smath.fwnm_to_sigma(fwhm, n=2)
# Make sure we resolve the curve nicely
energies = np.arange(max(1 * q.keV, energy_center - 2 * fwhm),
energy_center + 2 * fwhm, fwhm / 25) * q.keV
dE = energies[1] - energies[0]
print 'Energy from, to, step, number:', energies[0], energies[-1], dE, len(
energies)
bm = make_topotomo(dE=dE, pixel_size=ps, trajectory=tr)
spectrum_energies = np.arange(1, 50, 1) * q.keV
native_spectrum = get_spectrum(bm, spectrum_energies, ps)
fltr = GaussianFilter(energies, energy_center, sigma)
gauss = get_gauss(energies.magnitude, energy_center.magnitude,
sigma.magnitude)
filtered_spectrum = get_spectrum(bm, energies, ps) * gauss
intensity = propagate([bm, fltr], shape, energies, 0 * q.m, ps).get()
show(intensity,
title='Intensity for energy range {} - {}'.format(
energies[0], energies[-1]))
plt.figure()
plt.plot(spectrum_energies.magnitude, native_spectrum)
plt.title('Source Spectrum')
plt.xlabel('Energy [keV]')
plt.ylabel('Intensity')
plt.figure()
plt.plot(energies.magnitude, gauss)
plt.title('Gaussian Filter')
plt.xlabel('Energy [keV]')
plt.ylabel('Transmitted intensity')
plt.figure()
plt.plot(energies.magnitude, filtered_spectrum)
plt.title('Filtered Spectrum')
plt.xlabel('Energy [keV]')
plt.ylabel('Intensity')
plt.show()
def setUp(self):
syris.init(device_index=0)
wavelengths = np.arange(10) * q.nm
qe = np.ones(len(wavelengths))
self.camera = Camera(1e-3 * q.um,
1.0,
10.0,
0,
10,
(64, 64),
wavelengths=wavelengths,
quantum_efficiencies=qe,
exp_time=1 * q.s,
fps=1 / q.s)
def main():
"""main"""
syris.init(double_precision=True)
n = 512
ps = 0.5 * q.um
energy = 10 * q.keV
lam = energy_to_wavelength(energy)
# Compute the sampling limit for given n, ps and lam
ca = (lam / 2 / ps).simplified.magnitude
tga = np.tan(np.arccos(ca))
distance = (tga * n * ps / 2).simplified
print 'Propagation distance:', distance
propagator = compute_propagator(n,
distance,
lam,
ps,
apply_phase_factor=True,
mollified=False).get()
full_propagator = compute_propagator(n,
distance,
lam,
ps,
fresnel=False,
mollified=False).get()
np_propagator = compute_fourier_propagator(n, lam, distance, ps)
np_full_propagator = compute_fourier_propagator(n,
lam,
distance,
ps,
fresnel=False)
diff = propagator - np_propagator
full_diff = full_propagator - np_full_propagator
show(np.fft.fftshift(propagator.real),
'Syris Fresnel Propagator (Real Part)')
show(np.fft.fftshift(np_propagator.real),
'Numpy Fresnel propagator (Real Part)')
show(np.fft.fftshift(diff.real),
'Fresnel Syris - Fresnel Numpy (Real Part)')
show(np.fft.fftshift(full_propagator.real),
'Syris Full Propagator (Real Part)')
show(np.fft.fftshift(np_full_propagator.real),
'Numpy Full propagator (Real Part)')
show(np.fft.fftshift(full_diff.real),
'Full Syris - Full Numpy (Real Part)')
plt.show()
def setUp(self):
syris.init(device_index=0)
lens = Lens(3., f_number=1.4, focal_length=100.0 * q.mm)
camera = Camera(1 * q.um, 0.1, 10, 1.0, 12, (64, 64))
detector = Detector(None, lens, camera)
ps = detector.pixel_size
t = np.linspace(0, 1, 10) * q.mm
x = t
y = np.zeros(len(t))
z = np.zeros(len(t))
points = zip(x, y, z) * q.mm
mb_0 = MetaBall(Trajectory(points, pixel_size=ps, furthest_point=1 * q.um,
velocity=1 * q.mm / q.s), 1 * q.um)
mb_1 = MetaBall(Trajectory(points, pixel_size=ps, furthest_point=1 * q.um,
velocity=2 * q.mm / q.s), 1 * q.um)
self.experiment = Experiment([mb_0, mb_1], None, detector, 0 * q.m, None)
def setUp(self):
syris.init(device_index=0)
self.poly_deg = 4
self.coeffs = np.array([5, 87, -2, 37, 17], dtype=cfg.PRECISION.np_float)
self.coeffs_mem = cl.Buffer(cfg.OPENCL.ctx, cl.mem_flags.READ_ONLY |
cl.mem_flags.COPY_HOST_PTR,
hostbuf=self.coeffs)
self.scalar_mem = cl.Buffer(cfg.OPENCL.ctx, cl.mem_flags.READ_WRITE,
size=cfg.PRECISION.cl_float)
self.pixel_size = 1e-3
self.precision_places = int(np.log10(1 / self.pixel_size))
self.prg = g_util.get_program(g_util.get_metaobjects_source())
self.roots_mem = cl.Buffer(cfg.OPENCL.ctx, cl.mem_flags.READ_WRITE,
size=(self.poly_deg + 1) * cfg.PRECISION.cl_float)
def main():
args = parse_args()
syris.init()
n = 1024
shape = (n, n)
ps = 1 * q.um
tr = Trajectory([(n / 2, n / 2, 0)] * ps, pixel_size=ps)
energy_center = args.energy_center * q.keV
fwhm = args.energy_resolution * energy_center
sigma = smath.fwnm_to_sigma(fwhm, n=2)
# Make sure we resolve the curve nicely
energies = np.arange(max(1 * q.keV, energy_center - 2 * fwhm),
energy_center + 2 * fwhm,
fwhm / 25) * q.keV
dE = energies[1] - energies[0]
print 'Energy from, to, step, number:', energies[0], energies[-1], dE, len(energies)
bm = make_topotomo(dE=dE, pixel_size=ps, trajectory=tr)
spectrum_energies = np.arange(1, 50, 1) * q.keV
native_spectrum = get_spectrum(bm, spectrum_energies, ps)
fltr = GaussianFilter(energies, energy_center, sigma)
gauss = get_gauss(energies.magnitude, energy_center.magnitude, sigma.magnitude)
filtered_spectrum = get_spectrum(bm, energies, ps) * gauss
intensity = propagate([bm, fltr], shape, energies, 0 * q.m, ps).get()
show(intensity, title='Intensity for energy range {} - {}'.format(energies[0], energies[-1]))
plt.figure()
plt.plot(spectrum_energies.magnitude, native_spectrum)
plt.title('Source Spectrum')
plt.xlabel('Energy [keV]')
plt.ylabel('Intensity')
plt.figure()
plt.plot(energies.magnitude, gauss)
plt.title('Gaussian Filter')
plt.xlabel('Energy [keV]')
plt.ylabel('Transmitted intensity')
plt.figure()
plt.plot(energies.magnitude, filtered_spectrum)
plt.title('Filtered Spectrum')
plt.xlabel('Energy [keV]')
plt.ylabel('Intensity')
plt.show()
def main():
syris.init()
n = 256
shape = (n, n)
ps = 1 * q.um
fov = n * ps
triangles = make_cube().magnitude * n / 8. * ps
# Rotation around the vertical axis
points = make_circle(axis='y').magnitude * fov / 30000 + fov / 2
trajectory = geom.Trajectory(points, pixel_size=ps, velocity=10 * q.um / q.s)
# *orientation* aligns the object with the trajectory derivative
mesh = Mesh(triangles, trajectory, orientation=geom.Z_AX)
# Compute projection at the angle Pi/4
projection = mesh.project(shape, ps, t=trajectory.time / 8).get()
show(projection)
plt.show()
def process(args, device_index):
import syris
from syris.geometry import Trajectory
from syris.bodies.mesh import Mesh, read_blender_obj
syris.init(device_index=device_index, logfile=args.logfile,
double_precision=args.double_precision)
path, ext = os.path.splitext(args.input)
if ext == '.obj':
tri = read_blender_obj(args.input)
else:
tri = np.load(args.input)
tri = tri * q.um
tr = Trajectory([(0, 0, 0)] * q.um)
mesh = Mesh(tri, tr, center=None, iterations=args.supersampling_projection)
if args.n:
n = args.n
fov = n * args.pixel_size
else:
fov = max([ends[1] - ends[0] for ends in mesh.extrema[:-1]]) * 1.1
n = int(np.ceil((fov / args.pixel_size).simplified.magnitude))
shape = (n, n)
if args.make_gt:
LOG.info('--- Args info ---')
log_attributes(args)
return make_ground_truth(args, shape, mesh)
else:
num_projs = int(np.pi * n) if args.num_projections is None else args.num_projections
angles = np.linspace(0, args.rotation_angle, num_projs, endpoint=False) * q.deg
if device_index == 0:
LOG.info('n: {}, ps: {}, FOV: {}'.format(n, args.pixel_size, fov))
LOG.info('Total rotation angle: {} deg'.format(args.rotation_angle))
LOG.info('Number of projections: {}'.format(num_projs))
LOG.info('--- Mesh info ---')
log_attributes(mesh)
LOG.info('--- Args info ---')
log_attributes(args)
return scan(shape, args.pixel_size, args.rotation_axis, mesh, angles, args.prefix,
lamino_angle=args.lamino_angle, index=device_index,
num_devices=args.num_devices, ss=args.supersampling)
def main():
args = parse_args()
syris.init(platform_name=args.platform, loglevel='INFO')
if args.num_devices > len(cfg.OPENCL.queues):
fmt = "There are only {} devices available for platform '{}'"
raise ValueError(fmt.format(len(cfg.OPENCL.devices), args.platform))
queues = cfg.OPENCL.queues[:args.num_devices]
result = []
for n in args.n:
mean, std = run(n, args.pixel_size * q.um, args.runs, queues)
result.append((n, mean, std))
if args.output:
np.savetxt(args.output, result, fmt='%g',
header='n\tmean duration [s]\tstd [s], number of runs: {}'.format(args.runs),
delimiter='\t')
return result
def main():
args = parse_args()
syris.init(device_index=0)
shape = (args.n, args.n)
pixel_size = 1 * q.um
if args.method == 'random':
# Random metaballs creation
metaballs, objects_all = create_metaballs_random(args.n, pixel_size, args.num,
args.min_radius, args.max_radius)
elif args.method == 'file':
# 1e6 because packing converts to meters
values = np.fromfile(args.input, dtype=np.float32) * 1e6
metaballs, objects_all = create_metaballs(values.reshape(len(values) / 4, 4))
else:
distance = args.distance or args.n / 4
positions = [(args.n / 2 - distance, args.n / 2, 0, args.n / 6),
(args.n / 2 + distance, args.n / 2, 0, args.n / 6)]
metaballs, objects_all = create_metaballs(positions)
if args.output:
with open(args.output, mode='wb') as out_file:
out_file.write(objects_all)
z_min, z_max = get_z_range(metaballs)
print 'z min, max:', z_min.rescale(q.um), z_max.rescale(q.um), args.n * pixel_size + z_min
if args.algorithm == 'fast':
traj = Trajectory([(0, 0, 0)] * q.m)
comp = MetaBalls(traj, metaballs)
thickness = comp.project(shape, pixel_size).get()
else:
print 'Z steps:', int(((z_max - z_min) / pixel_size).simplified.magnitude + 0.5)
thickness = project_metaballs_naive(metaballs, shape, make_tuple(pixel_size)).get()
if args.output_thickness:
save_image(args.output_thickness, thickness)
show(thickness)
plt.show()
def main():
syris.init()
args = parse_args()
n = 256
shape = (n, n)
ps = 1 * q.um
num_projections = None
cube_edge = n / 4 * ps
fmt = os.path.join(args.output, 'projection_{:04}.tif')
x = np.linspace(n / 4 + n / 8, 3 * n / 4 + n / 8, num=10)
y = z = np.zeros(x.shape)
cube_0 = make_cube_body(n, ps, cube_edge)
cube_1 = make_cube_body(n, ps, cube_edge, phase_shift=np.pi * q.rad)
# Vertical motion component has such velocity that the cubes are displaced by their edge length
# 1 pixel for making sure we have one "complete" sinogram
velocity = (cube_edge - ps) / cube_0.trajectory.time
traj_y = geom.Trajectory(zip(y, x, z) * ps, pixel_size=ps, velocity=velocity)
composite = CompositeBody(traj_y, bodies=[cube_0, cube_1])
# Total time is the rotation time because we want one tomographic data set
total_time = cube_0.trajectory.time
dt = composite.get_next_time(0 * q.s, ps)
if num_projections is None:
num_projections = int(np.ceil((total_time / dt).simplified.magnitude))
print ' num_projs:', num_projections
print ' rotation time:', cube_0.trajectory.time
print ' vertical motion time:', traj_y.time
print ' simulation time:', total_time
for i in range(num_projections):
t = total_time / num_projections * i
composite.move(t)
projection = composite.project(shape, ps).get()
tifffile.imsave(fmt.format(i), projection)
show(projection)
plt.show()
def main():
syris.init()
n = 512
shape = (n, n)
ps = 1 * q.um
dE = 1 * q.keV
energies = np.arange(5, 30, dE.magnitude) * q.keV
cp = make_triangle(n=16) * 1e-1
tr = Trajectory(cp, velocity=10 * q.um / q.s, pixel_size=ps)
bm = BendingMagnet(2.5 * q.GeV, 100 * q.mA, 1.5 * q.T, 30 * q.m, dE, (200, 800) * q.um, ps, tr)
# Flat at time = 0
flat_0 = (abs(bm.transfer((512, 256), ps, energies[0], t=0 * q.s)) ** 2).real.get()
# Flat at half the time
flat_1 = (abs(bm.transfer((512, 256), ps, energies[0], t=tr.time / 2)) ** 2).real.get()
plt.subplot(121)
plt.imshow(flat_0)
f = plt.subplot(122)
plt.imshow(flat_1)
plt.show()
def main():
parser = get_default_parser(__doc__)
subparsers = parser.add_subparsers(help='sub-command help')
manual = subparsers.add_parser('manual', help='Manual positioning via simple transformations')
trajectory = subparsers.add_parser('trajectory', help='Automatic positioning via trajectories')
subtrajectories = subparsers.add_parser('subtrajectories', help='Automatic positioning with '
'local sub-body trajectories')
manual.set_defaults(_func=make_manual_sequence)
trajectory.set_defaults(_func=make_trajectory_sequence)
subtrajectories.add_argument('--t', type=float,
help='Time at which to compute the projection normalized to '
'[0, 1], if not specified, complete sequence is shown')
subtrajectories.set_defaults(_func=make_complex_trajectory_sequence)
args = parser.parse_args()
syris.init(device_index=0)
# Set constants
args.n = 512
args.shape = (args.n, args.n)
args.ps = 1 * q.um
args._func(args)
def setUp(self):
syris.init(device_index=0)
energies = range(10, 20) * q.keV
self.energy = energies[len(energies) / 2]
self.material = Material('foo', np.arange(len(energies), dtype=np.complex), energies)
def main():
args = parse_args()
syris.init()
# Propagate to 20 cm
d = 20 * q.cm
# Compute grid
n_camera = 256
n = n_camera * args.supersampling
shape = (n, n)
material = get_material('pmma_5_30_kev.mat')
energies = material.energies
dE = energies[1] - energies[0]
# Lens with magnification 5 and numerical aperture 0.25
lens = Lens(5, na=0.25)
# Considered visible light wavelengths
vis_wavelengths = np.arange(500, 700) * q.nm
# Simple camera quantum efficiencies
cam_qe = 0.1 * np.ones(len(vis_wavelengths))
camera = Camera(10 * q.um, 0.1, 500, 23, 32, (256, 256), exp_time=args.exposure * q.ms,
fps=1 / q.s, quantum_efficiencies=cam_qe, wavelengths=vis_wavelengths,
dtype=np.float32)
# Scintillator emits visible light into a region given by a Gaussian distribution
x = camera.wavelengths.rescale(q.nm).magnitude
sigma = fwnm_to_sigma(50)
emission = np.exp(-(x - 600) ** 2 / (2 * sigma ** 2)) / (sigma * np.sqrt(2 * np.pi))
# Scintillator 50 um thick, light yield 14 and refractive index 1.84
luag = get_material('luag.mat')
scintillator = Scintillator(50 * q.um,
luag,
14 * np.ones(len(energies)) / q.keV,
energies,
emission / q.nm,
camera.wavelengths,
1.84)
detector = Detector(scintillator, lens, camera)
# Pixel size used for propagation
ps = detector.pixel_size / args.supersampling
fmt = 'Pixel size used for propagation: {}'
print fmt.format(ps.rescale(q.um))
fmt = ' Effective detector pixel size: {}'
print fmt.format(detector.pixel_size.rescale(q.um))
print ' Field of view: {}'.format(n * ps.rescale(q.um))
# Bending magnet source
trajectory = Trajectory([(n / 2, n / 2, 0)] * ps)
source = make_topotomo(dE=dE, trajectory=trajectory, pixel_size=ps)
sample = make_sphere(n, n / 4. * ps, pixel_size=ps, material=material)
# Propagation with a monochromatic plane incident wave
coherent = propagate([source, sample], shape, [15 * q.keV], d, ps, t=0 * q.s,
detector=detector).get()
coherent *= camera.exp_time.simplified.magnitude
# Decimate to fit the effective pixel size of the detector system
coherent_ld = camera.get_image(coherent, shot_noise=False, amplifier_noise=False)
# Propagation which takes into account polychromaticity
poly = propagate([source, sample], shape, range(10, 30) * q.keV, d, ps, t=0 * q.s,
detector=detector).get()
poly *= camera.exp_time.simplified.magnitude
poly_ld = camera.get_image(poly, shot_noise=args.noise, amplifier_noise=args.noise)
# Compute and show some of the used propagators
propagator_10 = get_propagator_psf(n, d, ps, 10 * q.keV)
propagator_30 = get_propagator_psf(n, d, ps, 30 * q.keV)
show(coherent, title='Coherent Supersampled')
show(coherent_ld, title='Coherent Detector')
show(propagator_10.real, title='Propagator PSF for 10 keV (real part)')
show(propagator_30.real, title='Propagator PSF for 30 keV (real part)')
show(poly, title='Polychromatic Supersampled')
show(poly_ld, title='Polychromatic Detector')
plt.show()
def main():
"""Main function."""
args = parse_args()
syris.init(loglevel=logging.INFO, device_index=-1)
lam = energy_to_wavelength(args.energy * q.keV).simplified
w = args.aperture / 2 * q.um
# Width of the aperture is 2w, make the aperture half the image size
fov = 4 * w
ss = args.supersampling
d = (w ** 2 / args.fn / lam).simplified
ns, ps = compute_propagation_sampling(lam, d, fov, fresnel=True)
# Convolution outlier
ns *= 2
ps /= ss
fmt = 'n sampling: {}, ps: {}, FOV: {}, propagation distance: {}'
LOG.info(fmt.format(ns, np.round(ps.rescale(q.nm), 2), fov, np.round(d.rescale(q.cm), 2)))
res_a = propagate_analytically(ns * ss, w, ps, d, lam)
# Power of two for FFT
n = int(2 ** np.ceil(np.log2(ns)))
# Supersampling of the pixel size requires supersampling^2 more data points because we enlarge
# the FOV by changing the diffraction angle via changing the pixel size and this enlarged FOV is
# then sampled by supersampling-smaller pixel size
n_proper = n * ss ** 2
numerical_results = {}
for divisor in args.numerical_divisors:
if np.modf(np.log2(divisor))[0] != 0:
raise ValueError('All divisors must be power of two')
n_current = n_proper / divisor
if n_current < n * ss:
raise ValueError('divisor too large, maximum is {}'.format(ss))
numerical_results[n_current] = propagate_numerically(n_current, w, ps, d, lam)
x_data = np.linspace(-2 * w.magnitude, 2 * w.magnitude, res_a.shape[0])
aperture = np.zeros(res_a.shape[1])
aperture[res_a.shape[1] / 4:3 * res_a.shape[1] / 4] = res_a[n / 4 / ss].max()
if args.txt_output:
txt_data = [x_data, aperture, res_a[n / 4 / ss]]
txt_header = 'x\taperture\tanalytical'
plt.figure()
plt.plot(x_data, aperture, label='Aperture')
for n_pixels, num_result in numerical_results.items():
fraction = n_pixels / float(n_proper)
if args.txt_output:
txt_header += '\t{}'.format(fraction)
txt_data.append(num_result[n / 4 / ss])
plt.plot(x_data, num_result[n / 4 / ss], '--', label='Numerical {}'.format(fraction))
LOG.info('MSE: {}'.format(np.mean((num_result - res_a) ** 2)))
plt.plot(x_data, res_a[n / 4 / ss], '-.', label='Analytical')
plt.title('Analytical vs. Numerical Diffraction Pattern')
plt.xlabel(r'$\mu m$')
plt.ylabel(r'$I$')
plt.legend(loc='best')
plt.grid()
if args.txt_output:
txt_data = np.array(txt_data).T
np.savetxt(args.txt_output, txt_data, fmt='%g', delimiter='\t', header=txt_header)
plt.show()
