Hi everyone,

Is anyone aware of a means to obtain a bicubic spline interpolating *function* that is computed from an image using any ImageJ or Fiji method? I know how to to upsample an image using Image>Adjust>Size… with a bicubic interpolator, but this returns an upsampled image, not the interpolated function.

What I would like instead is a method that, after fitting, will accept any (x, y) tuple where x and y are real numbers and the returned number is the value of the interpolated function at that location.

The Apache Commons Math library provides such a class called PiecewiseBicubicSplineInterpolatingFunction, but I have been unable to determine whether similar functionality is in ImageJ.

Thanks!