CTF

class CTF(defocus=None, angles=None, opening_axis=2, tilt_axis=0, sampling_rate=1, acceleration_voltage=300, spherical_aberration=27000000.0, amplitude_contrast=0.07, phase_shift=0, astigmatism_angle=0, defocus_delta=0, correction_mode='phase-flip', wiener_falloff=None)

Bases: ComposableFilter

Generate per-tilt contrast transfer function filter masks.

Attributes

CTF.acceleration_voltage	The acceleration voltage in kV, defaults to 300
CTF.amplitude_contrast	The amplitude contrast, defaults to 0.07.
CTF.angles	The tilt angles in degrees.
CTF.astigmatism_angle	The astigmatism angle in radians, defaults to 0.
CTF.correction_mode	CTF correction mode: 'raw', 'wiener', 'phase-flip', 'phase-flip-weighted'.
CTF.defocus	The mean defocus value in Ångstrom (positive is underfocus).
CTF.defocus_delta	The defocus difference (half-delta) in Ångstrom, defaults to 0.
CTF.opening_axis	The microscope projection axis, defaults to 2 (z).
CTF.phase_shift	The phase shift in radians, defaults to 0.
CTF.sampling_rate	The sampling rate, defaults to 1 Ångstrom / voxel.
CTF.spherical_aberration	The spherical aberration, defaults to 2.7e7 (in Angstrom).
CTF.tilt_axis	The axis along which the tilt is applied, defaults to 0 (x).
CTF.wiener_falloff	B-factor style falloff for Wiener filter (Ų).

Methods

CTF.__call__([return_real_fourier])	This method provides the standard interface for creating of composable filter masks.
CTF.from_file(filename, **kwargs)	Initialize CTF from file.