Can anyone show me the algorithm to perform bi-cubic interpolation of an image?

I need to determine bi-cubic interpolation of an image. Please show me how it is done.

[KSSV]

Read about interp2

[Avinash Bhatt]

Sir, can you please show a demo by using interp2?

Answer 1

[KSSV]

I = imread('cameraman.tif') ;
[nx,ny] =size(I) ;
[X,Y] = meshgrid(1:ny,1:nx) ;
x = linspace(1,nx,500) ;
y = linspace(1,ny,500) ;

[Xi,Yi] = meshgrid(x,y) ;

I1 = interp2(X,Y,double(I),Xi,Yi) ;
imshow(uint8(I1)) ;

Also have a look on imresize

[Avinash Bhatt]

Thank You sir