Nearest Neighbour
Resampling kernel (k) has the dimensions 1 pixel by 1 scanline.

      0  
    +---+
  0 | X |
    +---+

Process for the resample window:

 output = NearestNeighbour( k[0,0] )

Where the resampling function is:

 NearestNeighbour( f0 ) 
 {
   return( f0 );
 }