\thispagestyle{empty}
\AddToShipoutPicture*{%
\put(0,0){%
\parbox[b][\paperheight]{\paperwidth}{%
\vfill
\centering
\includegraphics[width=\paperwidth,height=\paperheight,keepaspectratio]{img/trans4mation.pdf}%
\vfill
}}}
\mbox{}