SEE ALSO

RTD SF	[Rotate and Shift - image, Fourier based spline interpolation ||]
RT SF	[Rotate and Shift - image, Fourier based spline interpolation ||]
RT SQ	[Rotate and Shift - image, Quadratic interpolation ||]
ROT	[ROTate image/volume around center by specified angle(s)]
RB 3F	[Rotate, Shift, Back Projection in Fourier space |]
RB 32F	[Rotate, Shift, Sampled, Back Projection in Fourier space |]

USAGE

.OPERATION: RTD SQ

.INPUT FILE NAME OR TEMPLATE (E.G. STK@****): INSTACK03@
[Enter template for the names of the file(s) to be rotated. This template can alternatively refer to a single image (e.g. img001), or to a series of single images (e.g. img***), or to a series of stacked images (e.g stack3@***), or to a whole stack of images ending in '@' (e.g. stk@). Templates containing an asterisk will have the astericks substituted with a number for the file.]

If there is only a single input file specified the final three questions appear:

.OUTPUT FILE: STACK03@
[Enter the name of the file where the rotated and shifted images are to be placed. This output file will be a whole stack.]

.ROTATION ANGLE, SCALE: 90.0, .75
[Enter the rotation angle in degrees, and scale factor (>0). Default scale is set to 1.0 (see Note 2).]

.X, Y SHIFT : 12.34, -1.987
[Enter the X and Y shift values.]

Otherwise if the template contains an asterick the following questions appear:

.ENTER FILE NUMBERS OR SELECTION DOC. FILE NAME: select_03
[Enter the file numbers to be substituted into the file name template or name of a selection document file that contains the file numbers in the first register.]

.ENTER REG. NUMBERS FOR ANGLE, SCALE, X, & Y SHIFT: 1 2 3 4
[Enter the column positions in the document file where these parameters are stored. If scale register is zero the scale defaults to 1.0.]

.ANGLE/SCALE DOCUMENT FILE: ANGDOC
[Name of document file that contains angle in degrees, scale factor (>0), X, and Y shifts.

.OUTPUT IMAGE FILE NAME OR TEMPLATE (E.G. STK@****)~',
[Enter template for the names of the output image files. The rotated and shifted images are placed in these files. This template can alternatively refer to a series of single images (e.g. img***), or to a series of stacked images (e.g stack3@***), or to a whole stack of images ending in '@' (e.g. stk@). Templates containing an asterisk will have the astericks substituted with a number for the file.]

If this output template contains an asterick the final question appears:

.ENTER FILE NUMBERS OR SELECTION DOC. FILE NAME: select_03
[Enter the file numbers to be substituted into the output file name template or name of a selection document file that contains the file numbers in the first register.]

EXAMPLE Usage

NOTES

1. A change of scale will not change the image dimensions. All the parameters agree with the output of the marker program (operation 'MK').

2. The input file may be three-dimensional. In this case, each of the slices is separately rotated and shifted with respect to the z-axis, and stored in the output file, which will be created with the same X & Y dimensions.

3. The shifts can be any real numbers.

4. The accuracy of interpolation is much higher than that of the bilinear interpolation used in the 'RT' operation, but it is lower than the accuracy of bi-spline interpolation. In particular, the derivatives of the interpolated image are not continuous. The speed, however, is much higher than bi-spline interpolation.

5. Memory requirements: NX*NY+NZ

6. It is possible for the output image min. & max. intensities to be outside the range of the input image.

7. Implemented by: P. Penczek and A. Leith.

SUBROUTINES

ROTQSS, RTSQ, QUADRI, GETDOCDAT

CALLER

UTIL3