1. A method for determining a three-dimensional representation (V) of an object (O), characterized in that it comprises: the determination ( 404 ) of a set (Ω) of points (u) of a volume (D) and of a value (X(u)) of each of these points (u) at a given instant (t 0 ), the set (Ω) of points (u) comprising points (o) of the object (O) in its position at the given instant (t 0 ), the choosing ( 408 ) of a three-dimensional representation function (V β ) that can be parametrized with parameters (β), and of an operation (Op) giving, on the basis of the three-dimensional representation function (V β ), an estimation function ({tilde over (X)}=Op(V β )) for the value of each point (u) of the set (Ω), the determination of parameters (β), such that, for each point (u) of the set (Ω), the estimation ({tilde over (X)}(u)) of the value of the point (u) gives substantially the value of the point (X(u)).