Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GCPWORKS|Theory|Resampling">Resampling</a><hr>
<H5>Cubic Convolution</H5>
Cubic convolution determines the grey level from the weighted average
of the 16 closest pixels to the specified input coordinates, and assigns
that value to the output coordinates.  This method is closer to the perfect
sin(x)/x resampler than nearest neighbour or bilinear interpolation.  The
image is slightly sharper than that produced by bilinear interpolation,
and it does not have the disjointed appearance produced by nearest
neighbour interpolation.  Because the grey level values are altered by
this method, any image classification processes should be performed
before the interpolation.  Cubic convolution requires about 10 times
the computation time required by the nearest neighbour method.
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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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