.help arbpix Dec98 "Image Interpolator Package"
.ih
NAME
arbpix -- replace INDEF valued pixels with interpolated values
.ih
SYNOPSIS
include <math/iminterp.h>

arbpix (datain, dataout, npix, interp_type, boundary_type)

.nf
    real	datain[npix]	#I input data
    real	dataout[npix]	#O output array, dataout != datain
    int		npix		#I number of data points
    int		interp_type	#I type of interpolant
    int		boundary_type	#I type of boundary condition
.fi
.ih
ARGUMENTS
.ls datain
Array of input data containing 0 or more INDEF valued pixels.
.le
.ls dataout
Array of output data with INDEFS replaced by interpolated values.
The dataout array must be different from the datain array.
.le
.ls npix   
Number of data points.
.le
.ls interp_type
Type of interpolant. Options are II_NEAREST, II_LINEAR, II_POLY3, II_POLY5,
II_SPLINE3, II_SINC / II_LSINC, and II_DRIZZLE. The look-up table sinc
interpolant is not supported,  and defaults to the sinc interpolant.
The sinc interpolant width is 31 pixels. The drizzle interpolant is not
supported and defaults to the linear interpolant. The interpolant type
definitions are stored in the file math/iminterp.h.
.le
.ls boundary_type
Type of boundary extension. The only supported option is II_BOUNDARYEXT.
Polynomial interpolants of lower order are used if there are not enough
good pixels to define the requested interpolant. Nearest neighbor boundary
extension is used if there are not enough good points to define the sinc
interpolant. The boundary type definitions are stored in the header file
math/iminterp.h.
.le
.ih
DESCRIPTION
If there are no good points in datain, ARBPIX returns INDEFS in dataout.
Points below and above the first and last good point are replaced by the
first and last good point values respectively.
.ih
NOTES
The sinc function actually evaluates the interpolant by computing the
average of two interpolations at +-0.05 pixels about the bad pixel since
the interpolant is undefined exactly at a pixel.
.ih
SEE ALSO