AC MSS - Self Correlation - Masked and normalized ||

PURPOSE

Calculates self-correlation coefficients for circular mask. Coefficients are normalized. Image is padded with zeros. Works only for real images (not their Fourier transforms!). Command uses mix-radix FFT - the images need not have power-of-two dimensions.

SEE ALSO

AC	[Auto Correlation ||]
AC N	[Auto Correlation - Normalized ||]
AC S	[Self Correlation ||]
AC NS	[Self Correlation - Normalized ||]

USAGE

.OPERATION: AC MSS

.INPUT FILE: PIC001
[Enter the name of the file to be self-correlated.]

.OUTPUT FILE: MAC001
[Enter name of the file which will contain SAC coefficients.]

.MASK RADIUS: 25
[Enter radius of the circular mask which will be centered at NSAM/2+1, NROW/2+1]

.(F)ULL OR (H)ALF OUTPUT FILE: F
['F' results in a autocorrelation function file with dimensions 2*NSAM,2*NROW (useful for mask radius =>MAX(NSAM/4,NROW/4).
'H' results in a selfcorrelation function file with dimensions NSAM,NROW (enough if one is interested only in lower order SACF coefficients. or mask radius is small)]

NOTES

1. See documentation on 'AC' for the location of the origin.

2. For non-masked selfcorrelation function use 'AC S'.

3. Implemented by Paul Penczek.

SUBROUTINES

MACF, MACF_P, FMRS_2, FMRS_1, FFTMCF, ACRS_2, ACRS_2S

CALLER

CORR1