# Linear Transformation: Dilation (선형변환: 수축, 팽창)

Dilation
The transformation matrix $D$ for a direct dilation with center point $(p,q,1)$ and ratio $r$ is
$D= \begin{bmatrix} r & 0 & p(1-r) \\ 0 & r & q(1-r) \\ 0 & 0 & 1 \end{bmatrix}$.