コード例 #1
0
def configure(no_splines):

    # Create parameters file for analysis.
    #
    print("Creating XML file.")
    params = testingParameters()
    params.toXMLFile("fdecon.xml")

    # Create localization on a grid file.
    #
    print("Creating gridded localization.")
    emittersOnGrid.emittersOnGrid("grid_list.hdf5", settings.nx, settings.ny,
                                  1.5, 20, settings.test_z_range,
                                  settings.test_z_offset)

    # Create randomly located localizations file.
    #
    print("Creating random localization.")
    emittersUniformRandom.emittersUniformRandom("random_list.hdf5", 1.0,
                                                settings.margin,
                                                settings.x_size,
                                                settings.y_size,
                                                settings.test_z_range)

    # Create sparser grid for PSF measurement.
    #
    print("Creating data for PSF measurement.")
    emittersOnGrid.emittersOnGrid("sparse_list.hdf5", 6, 3, 1.5, 40, 0.0, 0.0)

    if no_splines:
        return

    # Create beads.txt file for spline measurement.
    #
    with saH5Py.SAH5Py("sparse_list.hdf5") as h5:
        locs = h5.getLocalizations()
        numpy.savetxt("beads.txt",
                      numpy.transpose(numpy.vstack((locs['x'], locs['y']))))

    # Create drift file, this is used to displace the localizations in the
    # PSF measurement movie.
    #
    dz = numpy.arange(-settings.spline_z_range,
                      settings.spline_z_range + 0.001, 0.01)
    drift_data = numpy.zeros((dz.size, 3))
    drift_data[:, 2] = dz
    numpy.savetxt("drift.txt", drift_data)

    # Also create the z-offset file.
    #
    z_offset = numpy.ones((dz.size, 2))
    z_offset[:, 1] = dz
    numpy.savetxt("z_offset.txt", z_offset)

    # Create simulated data for PSF measurement.
    #
    bg_f = lambda s, x, y, i3: background.UniformBackground(
        s, x, y, i3, photons=10)
    cam_f = lambda s, x, y, i3: camera.Ideal(s, x, y, i3, 100.)
    drift_f = lambda s, x, y, i3: drift.DriftFromFile(s, x, y, i3, "drift.txt")
    pp_f = lambda s, x, y, i3: photophysics.AlwaysOn(s, x, y, i3, 20000.0)

    if settings.use_dh:
        psf_f = lambda s, x, y, i3: psf.DHPSF(
            s, x, y, i3, 100.0, z_range=settings.spline_z_range)
    else:
        psf_f = lambda s, x, y, i3: psf.PupilFunction(s, x, y, i3, 100.0,
                                                      settings.zmn)

    sim = simulate.Simulate(background_factory=bg_f,
                            camera_factory=cam_f,
                            drift_factory=drift_f,
                            photophysics_factory=pp_f,
                            psf_factory=psf_f,
                            x_size=settings.x_size,
                            y_size=settings.y_size)

    sim.simulate("spline.dax", "sparse_list.hdf5", dz.size)

    # Measure the PSF.
    #
    print("Measuring PSF.")
    psf_name = "psf.psf"
    measurePSFBeads.measurePSFBeads("spline.dax",
                                    "z_offset.txt",
                                    "beads.txt",
                                    psf_name,
                                    aoi_size=int(settings.spline_size + 1),
                                    pixel_size=settings.pixel_size * 1.0e-3,
                                    z_range=settings.spline_z_range)

    # Measure the Spline.
    #
    if True:
        print("Measuring Spline.")
        psfToSpline.psfToSpline(psf_name, "psf.spline", settings.spline_size)
コード例 #2
0
def configure(cal_file = None):
    
    # Create parameters file for analysis.
    #
    print("Creating XML file.")
    params = testingParameters(cal_file = cal_file)
    params.toXMLFile("psf_fft.xml")

    # Create localization on a grid file.
    #
    print("Creating gridded localization.")
    emittersOnGrid.emittersOnGrid("grid_list.hdf5",
                                  settings.nx,
                                  settings.ny,
                                  1.5,
                                  20,
                                  settings.test_z_range,
                                  settings.test_z_offset)

    # Create randomly located localizations file.
    #
    print("Creating random localization.")
    emittersUniformRandom.emittersUniformRandom("random_list.hdf5",
                                                1.0,
                                                settings.margin,
                                                settings.x_size,
                                                settings.y_size,
                                                settings.test_z_range)

    # Create sparser grid for PSF measurement.
    #
    print("Creating data for PSF measurement.")
    emittersOnGrid.emittersOnGrid("sparse_list.hdf5",
                                  6,
                                  3,
                                  1.5,
                                  40,
                                  0.0,
                                  0.0)


    if False:
    
        # Create PSF using pupil functions directly.
        #
        print("Creating (theoritical) psf.")
        makePSFFromPF.makePSF("psf.psf",
                              settings.psf_size,
                              settings.pixel_size * 1.0e-3,
                              settings.zmn,
                              settings.psf_z_range,
                              settings.z_step)

    else:

        # Create beads.txt file for PSF measurement.
        #
        with saH5Py.SAH5Py("sparse_list.hdf5") as h5:
            locs = h5.getLocalizations()
            numpy.savetxt("beads.txt", numpy.transpose(numpy.vstack((locs['x'], locs['y']))))

        # Create drift file, this is used to displace the localizations in the
        # PSF measurement movie.
        #
        dz = numpy.arange(-settings.psf_z_range, settings.psf_z_range + 0.001, 0.010)
        drift_data = numpy.zeros((dz.size, 3))
        drift_data[:,2] = dz
        numpy.savetxt("drift.txt", drift_data)

        # Also create the z-offset file.
        #
        z_offset = numpy.ones((dz.size, 2))
        z_offset[:,1] = dz
        numpy.savetxt("z_offset.txt", z_offset)

        # Create simulated data for PSF measurement.
        #
        bg_f = lambda s, x, y, i3 : background.UniformBackground(s, x, y, i3, photons = 10)
        cam_f = lambda s, x, y, i3 : camera.Ideal(s, x, y, i3, 100.)
        drift_f = lambda s, x, y, i3 : drift.DriftFromFile(s, x, y, i3, "drift.txt")
        pp_f = lambda s, x, y, i3 : photophysics.AlwaysOn(s, x, y, i3, 20000.0)
        psf_f = lambda s, x, y, i3 : psf.PupilFunction(s, x, y, i3, 100.0, settings.zmn)
    
        sim = simulate.Simulate(background_factory = bg_f,
                                camera_factory = cam_f,
                                drift_factory = drift_f,
                                photophysics_factory = pp_f,
                                psf_factory = psf_f,
                                x_size = settings.x_size,
                                y_size = settings.y_size)
    
        sim.simulate("psf.dax", "sparse_list.hdf5", dz.size)

        # Measure the PSF using spliner/measure_psf_beads.py
        #
        print("Measuring PSF.")
        measurePSFBeads.measurePSFBeads("psf.dax",
                                        "z_offset.txt",
                                        "beads.txt",
                                        "psf.psf",
                                        aoi_size = int(settings.psf_size/2)+1,
                                        pixel_size = settings.pixel_size * 1.0e-3,
                                        z_range = settings.psf_z_range,
                                        z_step = settings.z_step)
コード例 #3
0
def configure(no_splines, cal_file=None):

    # Create sCMOS calibration file if requested.
    #
    if cal_file is not None:
        offset = numpy.zeros(
            (settings.y_size, settings.x_size)) + settings.camera_offset
        variance = numpy.ones((settings.y_size, settings.x_size))
        gain = numpy.ones(
            (settings.y_size, settings.x_size)) * settings.camera_gain
        rqe = numpy.ones((settings.y_size, settings.x_size))
        numpy.save(cal_file, [offset, variance, gain, rqe, 2])

    # Create parameters file for analysis.
    #
    print("Creating XML file.")
    params = testingParameters(cal_file=cal_file)
    params.toXMLFile("spliner.xml")

    # Create localization on a grid file.
    #
    print("Creating gridded localization.")
    emittersOnGrid.emittersOnGrid("grid_list.hdf5", settings.nx, settings.ny,
                                  1.5, 20, settings.test_z_range,
                                  settings.test_z_offset)

    # Create randomly located localizations file.
    #
    print("Creating random localization.")
    emittersUniformRandom.emittersUniformRandom("random_list.hdf5", 1.0,
                                                settings.margin,
                                                settings.x_size,
                                                settings.y_size,
                                                settings.test_z_range)

    # Create sparser grid for PSF measurement.
    #
    print("Creating data for PSF measurement.")
    emittersOnGrid.emittersOnGrid("sparse_list.hdf5", 6, 3, 1.5, 40, 0.0, 0.0)

    if no_splines:
        return

    # Create beads.txt file for spline measurement.
    #
    with saH5Py.SAH5Py("sparse_list.hdf5") as h5:
        locs = h5.getLocalizations()
        numpy.savetxt("beads.txt",
                      numpy.transpose(numpy.vstack((locs['x'], locs['y']))))

    # Create drift file, this is used to displace the localizations in the
    # PSF measurement movie.
    #
    dz = numpy.arange(-settings.spline_z_range,
                      settings.spline_z_range + 0.001, 0.01)
    drift_data = numpy.zeros((dz.size, 3))
    drift_data[:, 2] = dz
    numpy.savetxt("drift.txt", drift_data)

    # Also create the z-offset file.
    #
    z_offset = numpy.ones((dz.size, 2))
    z_offset[:, 1] = dz
    numpy.savetxt("z_offset.txt", z_offset)

    # Create simulated data for PSF measurement.
    #
    bg_f = lambda s, x, y, i3: background.UniformBackground(
        s, x, y, i3, photons=10)
    cam_f = lambda s, x, y, i3: camera.Ideal(s, x, y, i3, 100.)
    drift_f = lambda s, x, y, i3: drift.DriftFromFile(s, x, y, i3, "drift.txt")
    pp_f = lambda s, x, y, i3: photophysics.AlwaysOn(s, x, y, i3, 20000.0)
    psf_f = lambda s, x, y, i3: psf.PupilFunction(s, x, y, i3, 100.0, settings.
                                                  zmn)

    sim = simulate.Simulate(background_factory=bg_f,
                            camera_factory=cam_f,
                            drift_factory=drift_f,
                            photophysics_factory=pp_f,
                            psf_factory=psf_f,
                            x_size=settings.x_size,
                            y_size=settings.y_size)

    sim.simulate("spline.dax", "sparse_list.hdf5", dz.size)

    # Measure the PSF.
    #
    print("Measuring PSF.")
    psf_name = "psf.psf"
    measurePSFBeads.measurePSFBeads("spline.dax",
                                    "z_offset.txt",
                                    "beads.txt",
                                    psf_name,
                                    aoi_size=int(settings.spline_size + 1),
                                    pixel_size=settings.pixel_size * 1.0e-3,
                                    z_range=settings.spline_z_range)

    # Smooth the PSF if requested.
    #
    if settings.smooth_psf:
        with open(psf_name, "rb") as fp:
            psf_data = pickle.load(fp)
        sm_psf = measurePSFUtils.smoothPSF(psf_data["psf"],
                                           xy_sigma=settings.smooth_psf_sigma,
                                           z_sigma=settings.smooth_psf_sigma)
        psf_data["psf"] = sm_psf
        psf_data["smoothed"] = True

        psf_name = "psf_smooth.psf"
        with open(psf_name, "wb") as fp:
            pickle.dump(psf_data, fp)

    # Measure the Spline.
    #
    if True:
        print("Measuring Spline.")
        psfToSpline.psfToSpline(psf_name, "psf.spline", settings.spline_size)
コード例 #4
0
def measurePSF():

    # Create sparse random localizations for PSF measurement.
    #
    print("Creating random localization.")
    emittersUniformRandom.emittersUniformRandom("sparse_random.hdf5", 0.0002,
                                                settings.margin,
                                                settings.x_size,
                                                settings.y_size, 0.0)

    # Create sparser grid for PSF measurement.
    #
    print("Creating data for PSF measurement.")
    emittersOnGrid.emittersOnGrid("sparse_grid.hdf5", 8, 3, 1.5, 40, 0.0, 0.0)

    # Create text files for PSF measurement.
    #
    locs = saH5Py.loadLocalizations("sparse_random.hdf5")
    [xf, yf] = iaUtilsC.removeNeighbors(locs["x"], locs["y"],
                                        2.0 * ((settings.psf_size / 2) + 1))
    numpy.savetxt("sparse_random.txt", numpy.transpose(numpy.vstack((xf, yf))))

    locs = saH5Py.loadLocalizations("sparse_grid.hdf5")
    numpy.savetxt("sparse_grid.txt",
                  numpy.transpose(numpy.vstack((locs['x'], locs['y']))))

    # Create drift file, this is used to displace the localizations in the
    # PSF measurement movie.
    #
    dz = numpy.arange(-settings.psf_z_range, settings.psf_z_range + 0.001,
                      0.010)
    drift_data = numpy.zeros((dz.size, 3))
    drift_data[:, 2] = dz
    numpy.savetxt("drift.txt", drift_data)

    # Also create the z-offset file.
    #
    z_offset = numpy.ones((dz.size, 2))
    z_offset[:, 1] = dz
    numpy.savetxt("z_offset.txt", z_offset)

    z_offset[:, 0] = 0
    numpy.savetxt("z_offset_none_valid.txt", z_offset)

    # Create simulated data for PSF measurement.
    #
    bg_f = lambda s, x, y, i3: background.UniformBackground(
        s, x, y, i3, photons=10)
    cam_f = lambda s, x, y, i3: camera.Ideal(s, x, y, i3, 100.)
    drift_f = lambda s, x, y, i3: drift.DriftFromFile(s, x, y, i3, "drift.txt")
    pp_f = lambda s, x, y, i3: photophysics.AlwaysOn(s, x, y, i3, 20000.0)
    psf_f = lambda s, x, y, i3: psf.PupilFunction(s, x, y, i3, 100.0, settings.
                                                  zmn)

    sim = simulate.Simulate(background_factory=bg_f,
                            camera_factory=cam_f,
                            drift_factory=drift_f,
                            photophysics_factory=pp_f,
                            psf_factory=psf_f,
                            x_size=settings.x_size,
                            y_size=settings.y_size)

    if True:
        sim.simulate("sparse_grid.tif", "sparse_grid.hdf5", dz.size)
        sim.simulate("sparse_random.tif", "sparse_random.hdf5", dz.size)

    # Measure the PSF using spliner/measure_psf_beads.py and multiplane/measure_psf.py
    #

    diff_detected = False

    # Grid.
    if True:

        # Remove old results.
        for elt in [
                "sparse_grid_beads.psf", "sparse_grid_hdf5_zo.psf",
                "sparse_grid_hdf5.psf", "sparse_grid_hdf5_mp_zo.psf"
        ]:
            if os.path.exists(elt):
                os.remove(elt)

        print("Measuring PSF (beads).")
        measurePSFBeads.measurePSFBeads("sparse_grid.tif",
                                        "z_offset.txt",
                                        "sparse_grid.txt",
                                        "sparse_grid_beads.psf",
                                        aoi_size=int(settings.psf_size / 2 +
                                                     1),
                                        z_range=settings.psf_z_range,
                                        z_step=settings.psf_z_step)

        print("Measuring PSF (HDF5, with zoffset).")
        spMeasurePSF.measurePSF("sparse_grid.tif",
                                "z_offset.txt",
                                "sparse_grid_ref.hdf5",
                                "sparse_grid_hdf5_zo.psf",
                                aoi_size=int(settings.psf_size / 2 + 1),
                                z_range=settings.psf_z_range,
                                z_step=settings.psf_z_step)

        print("Measuring PSF (HDF5).")
        spMeasurePSF.measurePSF("sparse_grid.tif",
                                "",
                                "sparse_grid_ref.hdf5",
                                "sparse_grid_hdf5.psf",
                                aoi_size=int(settings.psf_size / 2 + 1),
                                z_range=settings.psf_z_range,
                                z_step=settings.psf_z_step)

        multiplane_path = os.path.dirname(
            inspect.getfile(storm_analysis)) + "/multi_plane/"
        print("Measure PSF (multiplane).")
        psfZStack.psfZStack("sparse_grid.tif",
                            "sparse_grid.hdf5",
                            "sparse_grid_zstack",
                            aoi_size=int(settings.psf_size / 2 + 1))

        mpMeasurePSF.measurePSF("sparse_grid_zstack.npy",
                                "z_offset.txt",
                                "sparse_grid_hdf5_mp_zo.psf",
                                z_range=settings.psf_z_range,
                                z_step=settings.psf_z_step,
                                normalize=True)

        # Check that the PSFs are the same.
        psf_beads = numpy.load("sparse_grid_beads.psf",
                               allow_pickle=True)["psf"]
        psf_hdf5_zo = numpy.load("sparse_grid_hdf5_zo.psf",
                                 allow_pickle=True)["psf"]
        psf_hdf5 = numpy.load("sparse_grid_hdf5.psf", allow_pickle=True)["psf"]
        psf_hdf5_mp_zo = numpy.load("sparse_grid_hdf5_mp_zo.psf",
                                    allow_pickle=True)["psf"]

        diff_detected = diff_detected or psfDiffCheck(psf_beads, psf_hdf5_zo)
        diff_detected = diff_detected or psfDiffCheck(psf_beads, psf_hdf5)

        # Here we are only checking they are close.
        if (settings.psf_size >= 20):
            diff_detected = diff_detected or psfDiffCheck(
                psf_beads, psf_hdf5_mp_zo, atol=0.17, rtol=0.17)

    # Grid, no valid z offsets. These are supposed to fail.
    #
    if True:
        print("Measuring PSF (beads).")
        try:
            measurePSFBeads.measurePSFBeads(
                "sparse_grid.tif",
                "z_offset_none_valid.txt",
                "sparse_grid.txt",
                "sparse_grid_beads.psf",
                aoi_size=int(settings.psf_size / 2 + 1),
                z_range=settings.psf_z_range,
                z_step=settings.psf_z_step)
        except AssertionError:
            pass
        else:
            assert False, "spliner.measure_psf_beads did not fail!"

        print("Measuring PSF (HDF5, with zoffset).")
        try:
            spMeasurePSF.measurePSF("sparse_grid.tif",
                                    "z_offset_none_valid.txt",
                                    "sparse_grid_ref.hdf5",
                                    "sparse_grid_hdf5_zo.psf",
                                    aoi_size=int(settings.psf_size / 2 + 1),
                                    z_range=settings.psf_z_range,
                                    z_step=settings.psf_z_step)
        except AssertionError:
            pass
        else:
            assert False, "spliner.measure_psf did not fail!"

        print("Measure PSF (multiplane).")
        try:
            psfZStack.psfZStack("sparse_grid.tif",
                                "sparse_grid.hdf5",
                                "sparse_grid_zstack",
                                aoi_size=int(settings.psf_size / 2 + 1))

            mpMeasurePSF.measurePSF("sparse_grid_zstack.npy",
                                    "z_offset_none_valid.txt",
                                    "sparse_grid_hdf5_mp_zo.psf",
                                    z_range=settings.psf_z_range,
                                    z_step=settings.psf_z_step,
                                    normalize=True)
        except AssertionError:
            pass
        else:
            assert False, "multiplane PSF measurement did not fail!"

    # Random.
    if True:

        # Remove old results.
        for elt in [
                "sparse_random_beads.psf", "sparse_random_hdf5_zo.psf",
                "sparse_random_hdf5.psf"
        ]:
            if os.path.exists(elt):
                os.remove(elt)

        print("Measuring PSF (beads).")
        measurePSFBeads.measurePSFBeads("sparse_random.tif",
                                        "z_offset.txt",
                                        "sparse_random.txt",
                                        "sparse_random_beads.psf",
                                        aoi_size=int(settings.psf_size / 2 +
                                                     1),
                                        z_range=settings.psf_z_range,
                                        z_step=settings.psf_z_step)

        print("Measuring PSF (HDF5, with zoffset).")
        spMeasurePSF.measurePSF("sparse_random.tif",
                                "z_offset.txt",
                                "sparse_random_ref.hdf5",
                                "sparse_random_hdf5_zo.psf",
                                aoi_size=int(settings.psf_size / 2 + 1),
                                z_range=settings.psf_z_range,
                                z_step=settings.psf_z_step)

        print("Measuring PSF (HDF5).")
        spMeasurePSF.measurePSF("sparse_random.tif",
                                "",
                                "sparse_random_ref.hdf5",
                                "sparse_random_hdf5.psf",
                                aoi_size=int(settings.psf_size / 2 + 1),
                                z_range=settings.psf_z_range,
                                z_step=settings.psf_z_step)

        psf_beads = numpy.load("sparse_random_beads.psf",
                               allow_pickle=True)["psf"]
        psf_hdf5_zo = numpy.load("sparse_random_hdf5_zo.psf",
                                 allow_pickle=True)["psf"]
        psf_hdf5 = numpy.load("sparse_random_hdf5.psf",
                              allow_pickle=True)["psf"]

        diff_detected = diff_detected or psfDiffCheck(psf_beads, psf_hdf5_zo)
        diff_detected = diff_detected or psfDiffCheck(psf_beads, psf_hdf5)

    if diff_detected:
        print("Difference detected in PSF measurements!")
    else:
        print("No differences detected, all good.")

    if False:
        with tifffile.TiffWriter("psf_diff.tif") as tf:
            for i in range(psf_beads.shape[0]):
                tf.save((psf_beads[i, :, :] - psf_hdf5_zo[i, :, :]).astype(
                    numpy.float32))
コード例 #5
0
def configure():

    # Create PF for pupil function.
    #
    print("Creating pupil function.")
    pf_size = 2 * (settings.spline_size - 1)
    makePupilFn.makePupilFunction("pupilfn.pfn",
                                  pf_size,
                                  settings.pixel_size * 1.0e-3,
                                  settings.zmn,
                                  z_offset=settings.z_offset)

    # Create PSF using pupil functions directly.
    #
    if False:
        print("Creating (theoritical) psf.")
        makePSFFromPF.makePSF("psf_fft.psf", settings.spline_size,
                              settings.pixel_size * 1.0e-3, settings.zmn,
                              settings.psf_fft_z_range,
                              settings.psf_fft_z_step)

        exit()

    # Localizations on a sparse parse grid for PSF
    # measurement for Spliner and PSF FFT.
    #
    print("Creating data for PSF measurement.")
    emittersOnGrid.emittersOnGrid("sparse_list.hdf5", 6, 3, 1.5, 40, 0.0,
                                  settings.z_offset)

    # Create beads.txt file for spline measurement.
    #
    with saH5Py.SAH5Py("sparse_list.hdf5") as h5:
        locs = h5.getLocalizations()
        numpy.savetxt("beads.txt",
                      numpy.transpose(numpy.vstack((locs['x'], locs['y']))))

    # Create drift file, this is used to displace the localizations in the
    # PSF measurement movie.
    #
    dz = numpy.arange(-settings.spline_z_range,
                      settings.spline_z_range + 0.001, 0.01)
    drift_data = numpy.zeros((dz.size, 3))
    drift_data[:, 2] = dz
    numpy.savetxt("drift.txt", drift_data)

    # Also create the z-offset file.
    #
    z_offset = numpy.ones((dz.size, 2))
    z_offset[:, 1] = dz
    numpy.savetxt("z_offset.txt", z_offset)

    # Create simulated data for PSF measurement.
    #
    bg_f = lambda s, x, y, i3: background.UniformBackground(
        s, x, y, i3, photons=10)
    cam_f = lambda s, x, y, i3: camera.Ideal(s, x, y, i3, 100.0)
    drift_f = lambda s, x, y, i3: drift.DriftFromFile(s, x, y, i3, "drift.txt")
    pp_f = lambda s, x, y, i3: photophysics.AlwaysOn(s, x, y, i3, 20000.0)
    psf_f = lambda s, x, y, i3: psf.PupilFunction(
        s, x, y, i3, settings.pixel_size, settings.zmn, pf_size=pf_size)

    sim = simulate.Simulate(background_factory=bg_f,
                            camera_factory=cam_f,
                            drift_factory=drift_f,
                            photophysics_factory=pp_f,
                            psf_factory=psf_f,
                            x_size=settings.x_size,
                            y_size=settings.y_size)

    sim.simulate("psf.dax", "sparse_list.hdf5", dz.size)

    # Create spline for Spliner
    #

    # Measure the PSF for Spliner
    #
    print("Measuring PSF.")
    psf_name = "psf_spliner.psf"
    measurePSFBeads.measurePSFBeads("psf.dax",
                                    "z_offset.txt",
                                    "beads.txt",
                                    psf_name,
                                    aoi_size=int(settings.spline_size + 1),
                                    pixel_size=settings.pixel_size * 1.0e-3)

    # Measure the Spline.
    #

    # This is slow, sometimes you don't want to do it.
    if True:
        print("Measuring Spline.")
        psfToSpline.psfToSpline(psf_name, "psf.spline", settings.spline_size)

    # Create measured PSF for PSF FFT.
    #

    # Measure the PSF using spliner/measure_psf_beads.py
    #
    print("Measuring PSF.")
    measurePSFBeads.measurePSFBeads("psf.dax",
                                    "z_offset.txt",
                                    "beads.txt",
                                    "psf_fft.psf",
                                    aoi_size=int(settings.spline_size - 1),
                                    pixel_size=settings.pixel_size * 1.0e-3,
                                    z_range=settings.psf_fft_z_range,
                                    z_step=settings.psf_fft_z_step)