Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GCPWORKS|Theory|Resampling">Resampling</a><hr>
<H5>Bilinear Interpolation</H5>
Bilinear interpolation determines the grey level from the weighted
average of the four closest pixels to the specified input coordinates,
and assigns that value to the output coordinates.  This method generates
an image of smoother appearance that nearest neighbour, but the grey
level values are altered in the process, resulting in blurring or loss
of image resolution.  Because of these changes in the grey level values,
any image classification processes should be performed before the
interpolation.  Bilinear interpolation requires 3 to 4 times the
computation time of 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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