Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GCPWORKS|Theory|Resampling|Resampling+Example">Resampling Example</a><hr>
<br><b>Bilinear Interpolation</b><br>
Resampling kernel (k) has the dimensions of 2 pixels by 2 scanlines.
<P>
<PRE>
      0   1  
    +---+---+
  0 | X |   |
    +---+---+
  1 |   |   |
    +---+---+
</PRE>
Process for the resample window:
<P>
<UL>
<LI> First process across each row of the resampling kernel:
</UL>
<PRE>
  row[0] = BilinearInterpolation( (1.0 - Xdistance), k[0,0],
                                   Xdistance       , k[0,1] )
  row[1] = BilinearInterpolation( (1.0 - Xdistance), k[1,0],
                                   Xdistance       , k[1,1] )
</PRE>
<UL>
<LI> Once each row has been processed, calculate the output value:
</UL>
<PRE>
  output = BilinearInterpolation( (1.0 - Ydistance), row[0],
                                   Ydistance       , row[1] )
</PRE>
Where the resampling function is:
<P>
<PRE>
 BilinearInterpolation( distance0, f0, distance1, f1 ) 
 {
   return(  f0 * distance0
          + f1 * distance1 );
 }
</PRE>
<hr>
Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GCPWORKS|Theory|Resampling|Resampling+Example">Resampling Example</a><br>
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