Inserting image, with overlaying text as title, outside of margins

Question

I have been told that this has been asked on the site before, but I keep searching both through google and the stack exchange search bar, and none of the questions are what I am looking for.

I want to include an image, larger than the margins, as the Background of the title, which means I need the text on TOP of the image being use as a title, rather than below or besides it.

This is to be done for the Article class, not beamer.

An example would be:

How can I achieve this?

Answer 1

Here is a simple code with eso-pic and its \AddToShipoutPictureBG* command. The starred version of the commands adds the image only once. In addition we use the titling package to conveniently place the title and have it in white, boldface characters without side effects.

\documentclass[12pt, a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fourier, erewhon}
\usepackage{geometry}
\usepackage{lipsum}%
\usepackage{titling}
\setlength{\droptitle}{-12ex}
\renewcommand{\maketitlehooka}{\color{white}\bfseries}
\usepackage{eso-pic}
\usepackage{adjustbox}

\AddToShipoutPictureBG*{%
 \AtPageUpperLeft{\adjincludegraphics[width=\paperwidth, valign=t]{Paul_Gauguin}}
}%

\title{D’où venons-nous ? Que sommes nous ? Où allons-nous ?}
\author{Paul Gauguin (1897)}
\date{}

\begin{document}

 \maketitle

\lipsum[1-15]

\end{document} 

Answer 2

Using \atxy{<x>}{<y>}{<content>}, made possible with the everypage macro \AddThispageHook, where <x> and <y> are coordinates relative to the upper left of the paper.

\documentclass[10pt,a4paper]{report}
%% Graphics
\usepackage{graphicx,xcolor}
\usepackage{everypage}
\usepackage{lipsum}
% THESE ARE LaTeX DEFAULTS; CAN CHANGE IF NEEDED.
\def\PageTopMargin{1in}
\def\PageLeftMargin{1in}
\newcommand\atxy[3]{%
 \AddThispageHook{\smash{\hspace*{\dimexpr-\PageLeftMargin-\hoffset+#1\relax}%
  \raisebox{\dimexpr\PageTopMargin+\voffset-#2\relax}{#3}}}}

\atxy{0in}{0in}{\raisebox{-\height}{\includegraphics[height=2in,width=\paperwidth]{example-image}}}
\atxy{.5\paperwidth}{\dimexpr1in+8pt\relax}{\makebox[0pt]{%
\Huge\color{red!90!black}\bfseries This is my added header test}}
\begin{document}
%% Titlepage
\vspace*{.2in}
\lipsum[1]
\end{document}