Insert a figure on the corner of the page

Question

I am using the following title page:

\documentclass[12pt]{article}
\usepackage{amsmath}
\usepackage[hidelinks]{hyperref}
\usepackage[usenames,dvipsnames]{color}
\usepackage{tikz}
\usepackage{epigraph}
\usepackage{lipsum}
\usepackage{fancyhdr}
\usepackage{soul}
\usepackage[toc,page]{appendix}
\usepackage{glossaries}
\usepackage[squaren,Gray]{SIunits}
\usepackage[export]{adjustbox}
\usepackage{caption}

\definecolor{titlepagecolor}{cmyk}{0.9,0.1,0.8,0.1}

\DeclareFixedFont{\titlefont}{T1}{ppl}{}{it}{0.5in}

\makeatletter                       
\def\printauthor{%                  
    {\large \@author}}              
\makeatother
\author{%
   \textcolor[RGB]{35, 127, 82}{\textbf{Pafuncio PAFUNCINHO}} \\
 \textit{  Bla bla bla bla bla}  \vspace{5pt} \\
\textcolor[RGB]{35, 127, 82}{\textbf{Zilcleio ZILCLEINHO}}\\    \textit{BLa bla bla bla}
    \texttt{}\vspace{5pt} \\
    \textcolor[RGB]{35, 127, 82}{\textbf{Coiso COISINHO}}\\       \textit{ Bla bla bla bla bla bla bla}
    \texttt{}
    }


        \newcommand\titlepagedecoration{%
        \begin{tikzpicture}[remember picture,overlay,shorten >= -10pt]

        \coordinate (aux1) at ([yshift=-15pt]current page.north east);
        \coordinate (aux2) at ([yshift=-410pt]current page.north east);
        \coordinate (aux3) at ([xshift=-4.5cm]current page.north east);
        \coordinate (aux4) at ([yshift=-150pt]current page.north east);

        \begin{scope}[titlepagecolor!40,line width=12pt,rounded corners=12pt]
        \draw
          (aux1) -- coordinate (a)
          ++(225:5) --
          ++(-45:5.1) coordinate (b);
        \draw[shorten <= -10pt]
          (aux3) --
          (a) --
          (aux1);
        \draw[opacity=0.6,titlepagecolor,shorten <= -10pt]
          (b) --
          ++(225:2.2) --
          ++(-45:2.2);
        \end{scope}
        \draw[titlepagecolor,line width=8pt,rounded corners=8pt,shorten <= -10pt]
          (aux4) --
          ++(225:0.8) --
          ++(-45:0.8);
        \begin{scope}[titlepagecolor!70,line width=6pt,rounded corners=8pt]
        \draw[shorten <= -10pt]
          (aux2) --
          ++(225:3) coordinate[pos=0.45] (c) --
          ++(-45:3.1);
        \draw
          (aux2) --
          (c) --
          ++(135:2.5) --
          ++(45:2.5) --
          ++(-45:2.5) coordinate[pos=0.3] (d);   
        \draw 
          (d) -- +(45:1);
        \end{scope}
        \end{tikzpicture}%
        }

\begin{document} 

    \begin{titlepage} 




    \noindent
    \titlefont Blablablablabla  \\ Blabl Blabla
    \epigraph{Bla bla bla bla bla bla bla bla bla\\ \vspace{2mm}  \textcolor[RGB]{35, 120, 82}{\textit{Bla bla bla bla bla bla bla bla bla bla.}}}%
    {\textsc{XXXX XXXXX XXXXX XXXXXX}\\ \textit{September 15, 2014, Neuch\^atel, Switzerland.}}
    \null\vfill
    \vspace*{1cm}
    \noindent
    \hfill
    \begin{minipage}{0.70\linewidth}
        \begin{flushright}
            \printauthor
        \end{flushright}
    \end{minipage}
    %
    \begin{minipage}{0.02\linewidth}
        \rule{1pt}{125pt}
    \end{minipage}


\titlepagedecoration
    \end{titlepage}
\end{document}

As I did not create this template, I don't really know how to use it. I would like to add a logo on the left corner, at the bottom. How could I do this, please?

Answer 1

Something like this. use of tikzpicture at the end. Here the proposal use reference point at (current page.center) then use shift={(x,y)} options, where x<0 and y<0 (3rd quadrant), to move the logo to the lower left corner. Of course, you could have use (current page.sout west) and use shift option with (x>0, y>0) to allocate the logo position.

\begin{tikzpicture}[remember picture, overlay]
\node[shift={(-5cm,-8cm)}] at (current page.center){\includegraphics[scale=0.2]{example-image-a}};
\end{tikzpicture}

Code

\documentclass[12pt]{article}
\usepackage{amsmath}
\usepackage[hidelinks]{hyperref}
\usepackage[usenames,dvipsnames]{color}
\usepackage{tikz}
\usepackage{epigraph}
\usepackage{lipsum}
\usepackage{fancyhdr}
\usepackage{soul,graphicx}
\usepackage[toc,page]{appendix}
\usepackage{glossaries}
\usepackage[squaren,Gray]{SIunits}
\usepackage[export]{adjustbox}
\usepackage{caption}

\definecolor{titlepagecolor}{cmyk}{0.9,0.1,0.8,0.1}

\DeclareFixedFont{\titlefont}{T1}{ppl}{}{it}{0.5in}

\makeatletter                       
\def\printauthor{%                  
    {\large \@author}}              
\makeatother
\author{%
   \textcolor[RGB]{35, 127, 82}{\textbf{Pafuncio PAFUNCINHO}} \\
 \textit{  Bla bla bla bla bla}  \vspace{5pt} \\
\textcolor[RGB]{35, 127, 82}{\textbf{Zilcleio ZILCLEINHO}}\\    \textit{BLa bla bla bla}
    \texttt{}\vspace{5pt} \\
    \textcolor[RGB]{35, 127, 82}{\textbf{Coiso COISINHO}}\\       \textit{ Bla bla bla bla bla bla bla}
    \texttt{}
    }
        \newcommand\titlepagedecoration{%
        \begin{tikzpicture}[remember picture,overlay,shorten >= -10pt]

        \coordinate (aux1) at ([yshift=-15pt]current page.north east);
        \coordinate (aux2) at ([yshift=-410pt]current page.north east);
        \coordinate (aux3) at ([xshift=-4.5cm]current page.north east);
        \coordinate (aux4) at ([yshift=-150pt]current page.north east);

        \begin{scope}[titlepagecolor!40,line width=12pt,rounded corners=12pt]
        \draw
          (aux1) -- coordinate (a)
          ++(225:5) --
          ++(-45:5.1) coordinate (b);
        \draw[shorten <= -10pt]
          (aux3) --
          (a) --
          (aux1);
        \draw[opacity=0.6,titlepagecolor,shorten <= -10pt]
          (b) --
          ++(225:2.2) --
          ++(-45:2.2);
        \end{scope}
        \draw[titlepagecolor,line width=8pt,rounded corners=8pt,shorten <= -10pt]
          (aux4) --
          ++(225:0.8) --
          ++(-45:0.8);
        \begin{scope}[titlepagecolor!70,line width=6pt,rounded corners=8pt]
        \draw[shorten <= -10pt]
          (aux2) --
          ++(225:3) coordinate[pos=0.45] (c) --
          ++(-45:3.1);
        \draw
          (aux2) --
          (c) --
          ++(135:2.5) --
          ++(45:2.5) --
          ++(-45:2.5) coordinate[pos=0.3] (d);   
        \draw 
          (d) -- +(45:1);
        \end{scope}
        \end{tikzpicture}%
        }

\begin{document} 

    \begin{titlepage} 
    \noindent
    \titlefont Blablablablabla  \\ Blabl Blabla
    \epigraph{Bla bla bla bla bla bla bla bla bla\\ \vspace{2mm}  \textcolor[RGB]{35, 120, 82}{\textit{Bla bla bla bla bla bla bla bla bla bla.}}}%
    {\textsc{XXXX XXXXX XXXXX XXXXXX}\\ \textit{September 15, 2014, Neuch\^atel, Switzerland.}}
    \null\vfill
    \vspace*{1cm}
    \noindent
    \hfill
    \begin{minipage}{0.70\linewidth}
        \begin{flushright}
            \printauthor
        \end{flushright}
    \end{minipage}
    %
    \begin{minipage}{0.02\linewidth}
        \rule{1pt}{125pt}
    \end{minipage}
\titlepagedecoration
\begin{tikzpicture}[remember picture, overlay]
\node[shift={(-5cm,-8cm)}] at (current page.center){\includegraphics[scale=0.2]{example-image-a}};
\end{tikzpicture}
\end{titlepage}

\end{document}