Question

how can I use my function as an interpolation method for imresize function in MATLAB?

I read MATLAB’s help about the way to use a custom function for interpolation method, but there was not any clear example. and I tried to write a code for ma

Answer 1

Here is how you call the resizing function, for an image A that would want to resize to 64×52, with a special kernel “lanczos2”:

B = imresize(A, [64 52], {@lanczos2,4.0} );

Here is one example of one interpolation kernel, which you would save as lanczos2.m

function f = lanczos2(x)
f = (sin(pi*x) .* sin(pi*x/2) + eps) ./ ((pi^2 * x.^2 / 2) + eps);
f = f .* (abs(x) < 2);
end

Note that this particular kernel is already implemented in imresize.m
I think that your issue had to do with the “@” which serves for referencing functions.