{
    setlength{fboxsep}{5px}
    setlength{fboxrule}{3px}
    noindentmakebox[linewidth]{
        fbox{
            {
                setlength{fboxsep}{3px}
                setlength{fboxrule}{1px}
                fbox{
                    includegraphics[scale=1.0]{test.png}
                }
            }
        }
    }
}

documentclass[]{article}

usepackage{graphics}

begin{document}
begin{center}
  fboxsep=5ptrelaxfboxrule=3ptrelax
  fbox{%
    fboxsep=3ptrelaxfboxrule=1ptrelax
    fbox{includegraphics{example-image}}}
end{center}
end{document}