Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GCPWORKS|Theory|Resampling">Resampling</a><hr>
<H5>Nearest Neighbour</H5>
Nearest neighbour interpolation determines the grey level from the
closest pixel to the specified input coordinates, and assigns that
value to the output coordinates.  This method is considered the most
efficient in terms of computation time.  Because it does not alter the
grey level value, a nearest neighbour interpolation is preferred if
subtle variations in the grey levels need to be retained, if
classification will follow the registration, or if a classified image
is to be resampled.<p>
Nearest neighbour interpolation introduces a small error into the
newly registered image.  The image may be offset spatially by up to
1/2 a pixel, causing a jagged or blocky appearance if there is much
rotation or scale change.
<P>
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Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GCPWORKS|Theory|Resampling">Resampling</a><br>
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