Function edt_sq 

pub fn edt_sq<T: BoolLike>(
    map: &[T],
    shape: (usize, usize),
    invert: bool,
) -> Vec<f64>

Squared EDT of a given image.

The interface is equivalent to edt, but it returns squared EDT.

It is more efficient if you only need squared edt, because you wouldn’t need to compute square root.