How can I determining polynomial function from image intensity values to implement Lagrange interpolation?

I am writing a code for Lagrange interpolation for which i need to determine the polynomial via image intensity values.

Answer 1

[madhan ravi]

https://in.mathworks.com/matlabcentral/answers/345344-lagrange-interpolation-in-2d#answer_271163

[Avinash Bhatt]

Which interpolation technique is helpful to interpolate an image?