Homogeneous Transformations

Example 2: perspective projection

z=1

[x,y]

line x=1

[x´,y´]

x´ = 1

y´ = y/x

w´= 1

Can multiply all three components

by the same number -- the 2D point

won’t change! Multiply by x.

x´ = x

y´ = y

w´= x