A scene is transformed by an affine transformation. Which properties are not changed by this transformation?

a$.$ incidence

b$.$ volumes

c$.$ ratio of distances

d$.$ parallelismLet $l$ be an ideal line in some image plane. Let $H$ be a homography that transforms $l$ to a new image plane resulting in the line $l^{\text{'}}$

Which type of geometric transformations $H$ result in an non$-$ideal line $l^{\text{'}}?$

a$.$ No transformation is able to achieve this.

b$.$ Affine Transformation

c$.$ Projective Transformation

d$.$ Similarity Transformation