Picture on title page

\maketitle creates a specific titlepage layout. You can't combine it with other elements. But you can use \titlehead to insert a graphic:

\documentclass[a4paper,12pt,titlepage]{scrartcl}
\usepackage{graphicx}
\titlehead{\centering\includegraphics[width=6cm]{tiger}}
\title{Report}
\author{blah}
\date{\today}
\publishers{blah}
\begin{document}  
\maketitle
\end{document}

You may also use the titling package. With it you can access the \title \author and \date variables in the title page. This worked fine for me:

\documentclass[a4paper,oneside,11pt]{book}
\usepackage{graphicx}
\usepackage{titling}
\title{The Lord of the Rings}
\author{John Tolkien}
\date{\today}
\begin{document}
\begin{titlingpage} %This starts the title page
\begin{center}
\includegraphics[height=2cm]{example-image}\\ %Put the logo you want here
\begin{large}
My University \\ %The name your university
My Department\\
\end{large}
\vspace{4cm} %You can control the vertical distance
\begin{large} 
\textbf{\thetitle} \\
\end{large}
\theauthor\\
\vspace{7cm} %Put the distance you need.
\thedate
\end{center}
\end{titlingpage}
\end{document}

*I edited the Large environment I put.