Index: trunk/doc/pslib/psLibSDRS.tex
===================================================================
--- trunk/doc/pslib/psLibSDRS.tex	(revision 1207)
+++ trunk/doc/pslib/psLibSDRS.tex	(revision 1214)
@@ -1,3 +1,3 @@
-%%% $Id: psLibSDRS.tex,v 1.60 2004-07-12 22:18:21 eugene Exp $
+%%% $Id: psLibSDRS.tex,v 1.61 2004-07-13 21:42:55 eugene Exp $
 \documentclass[panstarrs,spec]{panstarrs}
 
@@ -10,5 +10,5 @@
 \project{Pan-STARRS Image Processing Pipeline}
 \organization{Institute for Astronomy}
-\version{03}
+\version{04}
 \docnumber{PSDC-430-007}
 % note the use of the docnumber & version number:
@@ -2283,4 +2283,15 @@
 following types: \code{psS8}, \code{psU16}, \code{psF32}, \code{psF64}.
 
+\begin{verbatim}
+float psImagePixelInterpolate (psImage *input, float x, float y, psImageResampleMode mode);
+\end{verbatim}
+Perform interpolation of image pixel values to the given fractional
+coordinate \code{x,y}.  The function returns the interpolated value of
+the image at the given fractional pixel coordinates, based on the
+specified interpolation \code{mode}.  This function will likely be
+implemented as a macro for processing speed.  It may also be necessary
+to define a setup macro which pre-calculates certain values which
+would be reused in a loop.
+
 \subsubsection{Image I/O Functions}
 
@@ -2310,6 +2321,5 @@
 read images of the native FITS image types (\code{psU8}, \code{psU16},
 \code{psU32}, \code{psF32}, \code{psF64}).  The user is expected to
-convert the data type as needed with \code{psImageCopy}.  The return
-value must be 0 for a successful operation and 1 for an error.
+convert the data type as needed with \code{psImageCopy}.  
  
 \begin{verbatim}