More about bilinear and bicubic interpolation
- Bilinear interpolation
- Bicubic interpolation, includes nice comparison of Nearest-neighbor, Bilinear and Bicubic
- Image resampling
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Implementation in GRASS GIS 6.4.2 (source code):
- functions for a given point
- called from here: r.resamp.interp/main.c (see lines 154-290)