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RM AL2 - 2D Orientational/Translational alignment of Radon transforms

(3/19/90)

PURPOSE

Does a simultaneous rotational/tranlational alignment of Fourier transformed 2D Radon transforms.

USAGE

.OPERATION: RM AL2 X11,X12,X13,X14,X15,X16

[The optional registers will return: image number of last image, maximum of ccf, rotation angle, x-shift, y-shift, shift radius, shift phase]

.REFERENCE RADON TRANSFORM: REFRAD001
[enter name of reference transform.]

.ENTER FILE TEMPLATE: RAD2D***
[Enter example name of two-dimensional input Radon transform.]
.ENTER FILE NUMBERS: 1-188
[Enter file numbers of input 2D transforms.]

.TEMPLATE FOR CCF OUTPUT: *
[If * is answered no ouptu is produced. Otherwise for each combination of theta and phi one cross-correlation function between the input and the extracted Radon transform is written to disk.]

If a file name was given for CCF output:

.PSI NUMBER OF CCF: 11
[Anwer the number of the angle psi for which the cross-corelation function is written. Ths angle psi depends on the start value for the psi-search and the psi increment.]

.TEMPLATE FOR PEAK OUTPUT: Peakfile****
[Enter template for peak output. One peak file for each transform will be created. The number of this file will be the number of the transform.]

.ANGULAR SEARCH FROM, TO: -90,88

.IN INCREMENTS OF: 2
[Selfexplanatory]

.SHIFT RADIUS: 5
[Enter radius for translational alignment. Current maximum is 15.]

.DOCUMENT FILE: ALI2DOC001
[Enter name of document file. The key will be the image number, the rest is the same as the registers explained above.]

NOTES

  1. If the reference is the first input file, then, to obtain the correct alignment, the second files have to be rotated with the negative of the angle found. If RM SR is used, then the translation also has to be applied negative and has to be aplied first (option T). in Polar coordinates instead of negative values, add 180 degrees to the direction angle.

  2. if the reference is one of the seond files, then the first file has to be shifted and rotated with the shift/rotation parameters that RM AL2 calculates (no sign change!). If RM SR is used, use option R (= apply rotation first).

  3. Developed by: M. Radermacher

  4. Not Distributed!

SUBROUTINES

RADAL2, MRCC1F2, MRFOUR1

CALLER

UTIL5

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