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I created a small delphi application to solver bicubic spline interpolation problem. I have a grid of 4x4 functions value and I want use bicubic spline interpolation to get value for x, y point.

https://en.wikipedia.org/wiki/Bicubic_interpolation

I need to do some tests. Is there same online solver or free application to compare my results with these? I think Scilab can help me but I cannot understand how use it for bicubic spline interpolation.

Martin
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  • I don't use Scilab, but the documentation points to the function splin2d for the function to obtain the coefficients, and interp2d to evaluate the spline at any points using the coefficients found earlier. – syockit Aug 16 '23 at 02:48

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Have a look here. In page 125, you will find a piece of code and good explanations.

For more information, have a look here.

Claude Leibovici
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