Name

generate_ctf - generate a CTF object.

Usage

ctf = generate_ctf([defocus, cs, voltage, apix, bfactor, amp_contrast, astigmatism amplitude, astigmatism angle])

Input

This function takes a list as input. The values in the list are:

defocus

defocus in `µ`m. Positive number means underfocus.

cs

Spherical aberration constant in mm. (Default 2.0).

voltage

microscope voltage in `kV`. (Default 300 kV).

apix

pixel size in `Å`.

amp_contrast

Amplitude contrast ratio, unitless, given as percentage of (0,100). (Default 10%).

bfactor

B-factor defining exponential decay of Fourier amplitudes decay `Å^2`. (Default 0.0, i.e., no decay).

astigmatism amplitude

in [nm]. (Default 0.0).

astigmatism angle

in [degrees]. (Default 0.0).

Output

ctf

a CTF object, which is usually stored in the header: img.set_attr("ctf", ctf)

Description

1. See CTF_info for more information about CTF

Method

Reference

Author / Maintainer

Wei Zhang

Keywords

category 1

MORPHOLOGY

Files

utilities.py

See also

ctf_2, ctf_img, filt_ctf

Maturity

stable

works for most people, has been tested; test cases/examples available.

Bugs

None. It is perfect.