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Old 31st October 2007, 04:05   #3  |  Link
MfA
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Join Date: Mar 2002
Posts: 1,075
Memory access pattern on the vertical shear is nasty, but on something as simple as this who cares. Michael Unser has a paper on how accurate this approach can be compared to direct 2D interpolation (probably more than good enough most of the time).

http://bigwww.epfl.ch/publications/unser9502.pdf
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