Function track_points_forward_backward 

pub fn track_points_forward_backward<T>(
    previous: ImageView<'_, T, 1>,
    next: ImageView<'_, T, 1>,
    points: &[Vec2<f64>],
    options: RobustTrackOptions,
) -> Result<RobustTracks, VisionError>
where
    T: PixelComponent,

Tracks points in both directions and rejects inconsistent round trips.