OR SH - ORientation search - 2D, rotation & shift, uses polar coords. ||

PURPOSE

Determines rotational and translational orientation between two images after resampling into polar coordinates with optional additional check of mirror transformation. This is the same as: 'AP SH' except it only processes a single pair of images. (See align_overview.html for comparison of 'AP' and 'OR' operations.)

SEE ALSO

AP SH

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

USAGE

.OPERATION: OR SH [v1],[v2],[v3],[v4],[v5]

[The output registers will contain:
[v1] - rotation angle,
[v2] - X shift,
[v3] - Y shift,
[v4] - 1 = mirroring required, 0= no mirroring
[v5] - not-normalized correlation coefficient.
This is the only output from the operation]

.REFERENCE FILE: REF002
[Enter the name of the file containing the reference image; dimensions must be same as the input image.]

.TRANSLATION SEARCH RANGE, STEP SIZE: 6, 2
[The search for translation parameters will be restricted to +/- search range, performed every "step size" pixels.
Restrictions:
1. Search range + last ring <=NSAM/2-2
2. Search range has to be divisible by step size.]

.FIRST AND LAST RING: 2, 15
[Only polar coordinate radial rings with radii in the range 2-15 will be analyzed for rotational alignment.]

.EXPERIMENTAL INPUT FILE: IMG001
[Enter name of the file.]

.CHECK MIRRORED POSITION (0=NOCHECK / 1=CHECK)?: 1
[Can also check mirror image of the reference file.]

NOTES

1. This command employs the same method as 'AP SH'. For details see:
   Joyeux, L. and P.A. Penczek. Efficiency of 2D alignment methods. Ultramicroscopy, 92, 33-46 (2002).
   

2. Implemented by: Paul Penczek

3. Previously this operation was called 'OR MQ' or 'OR NQ'.

SUBROUTINES

APMASTER, APRINGS, AP_GETDAT, MRQLI_SS, AP_END

CALLER

UTIL3