FP - Fourier interpolation ||

PURPOSE

Takes input image/volume of any dimension and interpolated image/volume can be of any dimension. Creates enlarged image/volume using zero padding in Fourier Space.

SEE ALSO

IP	[Interpolate - Bilinear]
IP T	[Interpolate - Triangular]

USAGE

.OPERATION: FP

.INPUT FILE: H_PIC001
[Enter name of file containing input picture.]

.OUTPUT FILE: H_IMG022
[Enter name of file where output picture is to be kept.]

.INTERPOLATED DIMENSIONS (NSAM,NROW): 72, 48
[Enter interpolated X & Y dimensions of the output image]

For 3D input image:

.INTERPOLATED DIMENSION (NSLICE): 50
[Enter interpolated Z dimension of the output image]

NOTES

1. In the example above the input volume will be interpolated to an output volume of dimensions (72,48,50).

2. Interpolation is exact in a sense that the total energy of an image is preserved. Note that the interpolation is not exact on the old grid!

SUBROUTINES

FOUR1A_FP, FINT, FINT3

CALLER

FOUR1