AP I - Alignment - Initialize Rings File ||

PURPOSE

Creates a "Circular Rings File" for use by 'AP REF'. (This is usefull for distributed parallel runs and is usually not necessary for using 'AP REF' except for when there is a large number of reference images).
(See align_overview.html for comparison of 'AP' operations.)   Example.

SEE ALSO

AP REF

[Alignment - multi-reference, rotation & shift ||*]

USAGE

.OPERATION: AP I

.TEMPLATE FOR REFERENCE IMAGES: REF***
[Give the template name of the existing file series of reference images.]

.FILE NUMBERS OR SELECTION DOC. FILE NAME: SELECTREF
[Enter numbers of reference image files. The file numbers can also be read from a selection document file where file numbers are contained in the first register (not the keys).]

.FIRST, LAST RING, RING STEP & RAY SKIP: 5, 15, 1, 1
[Only rings with radii in the range 5-15 will be analyzed. If skip=0 or 1, then every ring between 5 and 15 will be taken; for skip=2, every second ring; etc.]

.REFERENCE RINGS FILE: refer_rings
[Give name for output file containing the circular reference rings. This file is can be used by 'AP REF', etc.]

.WEIGHT THE RINGS? (Y/N): Y
[Rings for references for use in operation 'AP REF' should be weighted. If this routine is used for other purposes you may not want to weight the rings here.]

NOTES

1. See 'AP REF' for further details

SUBROUTINES

APMASTER, APRINGS, NORMAS, NORMASC, ALRQ_M, CROSRNG_MS, CROSRNG_DS, FRNG, FRNGS, APPLYWS, ALRQS, PARABLD, RINGWE

CALLER

UTIL4