Unwanted space between logo and title in titlepage

Question

I have a problem that I can't resolve. I already did a title page using LaTeX but it contains many spaces between the logo of my school and the name of the school. This is my code please if any person can help me

\begin{titlepage}
\begin{minipage}{\linewidth}
\begin{center}
\color{blue}
\bf {REPUBLIQUE TUNISIENNE \\
MINISTERE DE L'ENSEIGNEMENT SUPERIEUR,\\
DE LA RECHERCHE SCIENTIFIQUE ET DE LA TECHNOLOGIE \\
UNIVERSITE TUNIS EL MANAR }
\centerline{
\includegraphics[width=0.8\linewidth]{logo}
}
\centerline{
\textcolor{myblue}{\bf \normalsize{INSTITUT SUPERIEUR D'INFORMATIQUE}}
}

\end{center}
\end{minipage}
\vspace{1cm}

\begin{minipage}[b]{\linewidth}
\begin{center}
\color{black}
\bf \Large{M\'EMOIRE DE MAST\`ERE}
\end{center}
\end{minipage}
\vspace{0.5cm}

\begin{minipage}[b]{\linewidth}
\begin{center}
\color{black} \normalsize \bf{{Pr\'esent\'e en vue de l'obtention du \\
Dipl\^ome de mast\`ere de recherche en G\'enie logiciel \\
Option:Logiciels et Syst\`emes Critiques }}
\end{center}
\end{minipage}
\vspace{0.5cm}

\hspace{4cm}\begin{minipage}[b]{0.5\linewidth}
\begin{center}



\end{center}
\end{minipage}

{\begin{minipage}[b]{\linewidth}
\begin{center}


 \fontsize{18}{24}\selectfont 
\bfseries{Protection de la vie priv\'ee dans les r\'eseaux sociaux : 
principalement Facebook}
\end{center}
\end{minipage}}

\vspace{0.5cm}

\begin{minipage}[b]{\linewidth}
\begin{center}
\textbf{Elabor\'e Par: Gherib Boutheina}
\vspace{0.5cm}

\textbf{Encadr\'e par: Nawel Ben Salem Grati}
\vspace{1cm}

{\large \bf{Ann\'ee Universitaire:2011-2012}}
\end{center}
\end{minipage}

\end{titlepage}

Answer 1

I assume that the relevant part of your code is this, isn't?

\centerline{%
\includegraphics[width=0.8\linewidth]{logo}%
}
\centerline{%
\textcolor{myblue}{\bf \normalsize{INSTITUT SUPERIEUR D'INFORMATIQUE}}%
}

From this code, I can see no reason for having a big space between the logo and the text which follows, so I guess that the space is indeed "inside" the logo. Can you check with an external tool if the logo contains some kind of white margin around?

If so, clip it with some graphic edition tool before including, or use the options trim=a b c d and clip of \includegraphics, where a b c d are the amounts to remove from the left, bottom, right and top of the original box, respectively.

\centerline{%
\includegraphics[width=0.8\linewidth,clip,trim=left bottom right top]{logo}%
}