TF FL - Transfer function - Flip sign of Fourier transform
(07/11/96)
PURPOSE
Simple CTF correction by flipping the sign of contrast transfer
function.
SEE ALSO
TF [Transfer Function - defocus dependent] TF C [Transfer Function - complex] TF C3 [Transfer Function - complex 3D] TF CT [Transfer Function - phase flipping, complex, ternary] TF CT3 [Transfer Function - complex, ternary 3D] TF CTF [Transfer Function - CTF correction] TF D [Transfer Function - display] TF DDF [Transfer Function - determine defocus and amplitude contrast] TF DEV [Transfer Function - determine envelope function] TF DNS [Transfer Function - determine and delete noise background] TF MFL [Transfer Function - make filter file for 'TF FL']
USAGE
.OPERATION: TF FL
.INPUT FILE: WI001
[Enter the name of the file you want to filter. It should be Fourier
file, NSAM=NROW.]
.OUTPUT FILE: WI002
[Enter the name of output file. This file is also Fourier space file.]
.FILTER FILE: FIL001
[Enter the name of filter file. This file is generated by TF DDF or
TF MFL. This is one dimensional file.]
NOTES
Flipping the sign of CTF is useful to better align defocus series.