[Tex/LaTex] How to add an image in the upper, left-hand corner using TikZ and graphicx

Question

This is perhaps a simple question with a simple answer, but I'm stumped as a tikz novice. What would be the best method to add an image (logo) file to the upper left-hand corner of my document?

MWE:

\documentclass[12pt]{article}

\usepackage{lipsum}
\usepackage{showframe}
%\usepackage{tikz}
%\usepackage{graphicx}

\begin{document}

\section*{Lorem Ipsum}

\lipsum[1]

\end{document}

I wish to avoid using fancyhdr to achieve this result.

Answer 1

While tikz is powerful, eso-pic can also be used to perform this via \AddToShipoutPictureBG (or \AddToShipoutPictureFG):

\documentclass[12pt]{article}

\usepackage{lipsum}% http://ctan.org/pkg/lipsum
\usepackage{showframe}% http://ctan.org/pkg/showframe
\usepackage{eso-pic}% http://ctan.org/pkg/eso-pic
\usepackage{graphicx}% http://ctan.org/pkg/graphicx

\AddToShipoutPictureBG{%
  \AtPageUpperLeft{\raisebox{-\height}{\includegraphics[width=1.5in]{tiger}}}%
}

\begin{document}

\section*{Lorem Ipsum}
\lipsum[1-50]

\end{document}