subtom_plot_filter
Creates a graphic of bandpass filters optionally with CTF.
subtom_plot_filter(
'box_size', box_size (''),
'pixelsize', pixelsize (1),
'high_pass_fp', high_pass_fp (0),
'high_pass_sigma', high_pass_sigma (0),
'low_pass_fp', low_pass_fp (0),
'low_pass_sigma', low_pass_sigma (0),
'defocus', defocus (0),
'voltage', voltage (300),
'cs', cs (0),
'ac', ac ('1.0'),
'phase_shift', phase_shift (0.0),
'b_factor', b_factor (0.0),
'output_fn_prefix', output_fn_prefix (''))
Takes in the local alignment filter parameters used in subTOM, high_pass_fp
,
high_pass_sigma
, low_pass_fp
, and low_pass_sigma
; then produces a
figure showing the filter that will be applied to the Fourier transform of the
reference during alignment. The Fourier pixel frequencies are converted into
Angstroms using the given box_size
and pixelsize
. A single CTF can also
be specified with defocus
, voltage
, cs
, ac
, phase_shift
, and
the root square of this curve will be plotted in addition to how the band-pass
filter affects the amplitude effects of the CTF. Finally a B-factor falloff can
also be specified with b_factor
, and this decay curve will also be plotted
and also plotted with the CTF root square, and also the CTF root square and
band-pass filter all together, so a cumulative effect of a specific choice of
filter parameters at a given defocus and falloff can be observed. If
output_fn_prefix
is not emtpy it is used to save the graphic in MATLAB
figure, pdf, and png formatted files.
Example
subtom_plot_filter(...
'box_size', 192, ...
'pixelsize', 1.35, ...
'high_pass_fp', 1, ...
'high_pass_sigma', 2, ...
'low_pass_fp', 48, ...
'low_pass_sigma', 3, ...
'defocus', 15000, ...
'voltage', 300, ...
'cs', 2.7, ...
'ac', 0.07, ...
'phase_shift', 0.0, ...
'b_factor', 0, ...
'output_fn_prefix', 'alignment_1');