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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

  1. Flipping the sign of CTF is useful to better align defocus series.

SUBROUTINES

FLIFIL

CALLER

UTIL1

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