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.help asiinit Dec98 "Image Interpolator Package"
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NAME
asiinit -- initialize the sequential interpolant descriptor using default parameters
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SYNOPSIS
include <math/iminterp.h>
asiinit (asi, interp_type)
.nf
pointer asi #O interpolant descriptor
int interp_type #I interpolant type
.fi
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ARGUMENTS
.ls asi
Pointer to sequential interpolant descriptor.
.le
.ls interp_type
Interpolant type. The options are II_NEAREST, II_LINEAR, II_POLY3, II_POLY5,
II_SPLINE3, II_SINC, II_LSINC, and II_DRIZZLE for nearest neighbor, linear,
3rd order polynomial, 5th order polynomial, cubic spline, sinc, look-up
table sinc, and drizzle respectively. The interpolant type definitions are
found in the package header file math/iminterp.h.
.le
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DESCRIPTION
The interpolant descriptor is allocated and initialized. The pointer asi is
returned by ASIINIT. The sinc interpolant width defaults to 31 pixels. The
look-up table sinc interpolant resolution defaults to 20 intervals or
0.05 pixels. The drizzle pixel fraction defaults to 1.0.
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NOTES
ASIINIT or ASISINIT must be called before using any other ASI routines.
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SEE ALSO
asisinit, asifree
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