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Topic: sub-pixel shifting of a matrix
Replies: 14   Last Post: Feb 7, 2013 12:23 PM

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Matt J

Posts: 4,997
Registered: 11/28/09
Re: sub-pixel shifting of a matrix
Posted: Feb 25, 2010 10:25 AM
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"Matt J " <mattjacREMOVE@THISieee.spam> wrote in message <hm56qd$t3c$>...

> Incidentally, I've just noticed that interp2 has a "*METHOD" option allowing you to tell it that the samples are uniformly spaced, for more optimized execution. This probably means that interp2 will implement the interpolation as a separable convolution for you under the hood.

Come to think of it, that can't (always) be true. The interpolation only boils down to a convolution if the sample spacing is 1 pixel. So the question is whether interp2 is smart enough to check for this special case.

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