Idiomatic C++ for remove_if

I have this class

class Point2D
{
public:
 bool isValid();
 // ...
private:
 double x_, y_;
};

I have a std::vector< Point2D > and I would like to remove the invalid points, now I do like this:

bool invalid ( const Point2D& p )
{
 return !p.isValid();
}

void f()
{
 std::vector< Point2D > points;
 // fill points
 points.erase( std::remove_if( points.begin(), points.end(), invalid ), points.end() );
 // use valid points
}

Is there a standard way of doing this (beautifully), for example without the need of "duplicating" the functionality of the class method Point2D::isValid?

Maybe using C++11 lambda (I am not very familiar with lambda)?