Q$2.$ Consider two vanishing points expressed in homogeneous coordinates: $v_1={\left[\begin{array}{ccc}0& 1& 1\end{array}\right]}^T$ and

$v_2={\left[\begin{array}{ccc}1& 0& 1\end{array}\right]}^T.$

What is the corresponding vanishing line?

What is the corresponding projection matrix?

Given $4$ points $p_i={\left[\begin{array}{ccc}{p}_{i1}& p_{i2}& 1\end{array}\right]}^T,i=1,$dots,$4$ known to be coplanar, how is it possible to

obtain the planar view $-$ namely to rectify the image?