This module transforms the image $in(a,b)$ into $out(A,B)$, where
$$\left( \begin{array}{c} A \\ B \end{array} \right) \quad
= \quad zoom \cdot 
\left( \begin{array}{cc}  \cos(\theta) & - \sin(\theta) \\
 \sin(\theta) & \;\;\;\cos(\theta) \\ \end{array} \right) \;
\left( \begin{array}{c} b \\ b \end{array} \right) \;+\;
\left( \begin{array}{c} x \\ y  \end{array} \right)$$
and $\displaystyle \theta = angle \cdot \frac{\pi}{180}$.
The image domain is the same. The interpolation method can be specified
as in \verb+fcrop+.
\index{zoom!of an image}
\index{rotation!of an image}
\index{translation!of an image}
