如何在标题页的下部添加标题图像？

Question

我目前有以下页面作为标题页：

左侧标题页有\vspace{10cm}/ \vspace{5cm}，右侧标题页无。上方为 A4 页面格式（供学生打印），下方为 A5 页面格式（供专业打印）。

我认为左边的看起来好多了。但我想“动态”插入空格（这样我就不必每次更改格式时都更改它）。我该怎么做？

这是来源（带图片来源)：

\documentclass[a4paper,oneside,DIV15,BCOR12mm]{scrbook}
\usepackage{etoolbox}
\usepackage{amsmath,amssymb}% math symbols / fonts
\usepackage{mathtools}      % \xRightarrow
\usepackage{nicefrac}       % \nicefrac
\usepackage[utf8]{inputenc} % this is needed for umlauts
\usepackage[ngerman]{babel} % this is needed for umlauts
\usepackage[T1]{fontenc}    % this is needed for correct output of umlauts in pdf
\usepackage[framed,amsmath,thmmarks,hyperref]{ntheorem}
\usepackage{framed}
\usepackage{marvosym}
\usepackage{makeidx} % for automatically generation of an index
\usepackage{xcolor}
\usepackage[bookmarks,bookmarksnumbered,hypertexnames=false,pdfpagelayout=OneColumn,colorlinks,hyperindex=false]{hyperref} % has to be after makeidx
\usepackage{enumitem}
\usepackage{tabto}
\usepackage{braket}         % needed for \Set
\usepackage{csquotes}       % \enquote{}
\usepackage{subfig}         % multiple figures in one
\usepackage{parskip}        % nicer paragraphs
\usepackage{xifthen}        % \isempty
\usepackage{changepage}     % for the adjustwidth environment
\usepackage{pst-solides3d}
\usepackage[colorinlistoftodos]{todonotes}
\usepackage{pgfplots}
\pgfplotsset{compat=1.7}
\usepackage[arrow, matrix, curve]{xy}
\usepackage{caption}        % get newlines within captions
\usepackage{tikz}           % draw
\usepackage{tikz-3dplot}    % draw
\usepackage{tkz-fct}        % draw
\usetikzlibrary{3d,calc,intersections,er,arrows,positioning,shapes.misc,patterns,fadings,decorations.pathreplacing}
\usepackage{tqft}
\usepackage{cleveref} % has to be after hyperref, ntheorem, amsthm
\usepackage{xspace}   % for new commands; decides weather I want to insert a space after the command

\author{Siehe \href{http://tinyurl.com/GeoTopo}{tinyurl.com/GeoTopo}}
\title{Geometrie und Topologie\\
        \vspace{10cm}
        \includegraphics[width=0.9\linewidth]{figures/Torus.pdf}}
\usepackage{microtype}

\begin{document}
\pagenumbering{roman}
\setcounter{page}{1}
\maketitle
\end{document}

我以为我可以做一个整页作为标题页。但这可能会导致字体大小出现问题。