documentclass{article}
usepackage{tikz}
usepackage{graphicx}

begin{document}
begin{tikzpicture}

begin{scope}
    clip [rounded corners=.5cm] (0,0) rectangle coordinate (centerpoint) (5,7.5cm);
    node [inner sep=0pt] at (centerpoint) {includegraphics[width=6.0cm]{EiffelTall.jpg}};
end{scope}

begin{scope}[xshift=7cm]
    clip [rounded corners=.5cm] (0,0) rectangle coordinate (centerpoint) ++(5cm,7.5cm);
    node [inner sep=0pt] at (centerpoint) {includegraphics[width=10.0cm]{EiffelTall.jpg}};
end{scope}

end{tikzpicture}
end{document}

documentclass{article}
usepackage{tikz}
usepackage{graphicx}

newcommand*{ClipSep}{0.4cm}%

begin{document}
includegraphics[width=5.0cm]{images/EiffelTall.jpg}
%
begin{tikzpicture}
node [inner sep=0pt] at (0,0) {includegraphics[width=5.0cm]{images/EiffelTall.jpg}};
draw [white, rounded corners=ClipSep, line width=ClipSep]
    (current bounding box.north west) --
    (current bounding box.north east) --
    (current bounding box.south east) --
    (current bounding box.south west) -- cycle
    ;
end{tikzpicture}
end{document}

defM{3}% columns
defN{3}% rows
defscale{1}% scale
deffilename{herbert}% filename

% Specify the cropping area.
defL{-2}
defB{-1.5}
defR{2}
defT{3}

documentclass[pstricks,border=12pt]{standalone}

defM{3}% columns
defN{3}% rows
defscale{1}% scale
deffilename{herbert}% filename


usepackage{graphicx}
newsaveboxIBox
saveboxIBox{includegraphics[scale=scale]{filename}}


usepackage{pstricks}
psset
{
  xunit=0.5dimexprwdIBox/Mrelax,
  yunit=0.5dimexprhtIBox/Nrelax,
}



begin{document}

% The following figure shows an image with a grid enabled.
% Use the grid to find the cropping area.
begin{pspicture}[showgrid=true](-M,-N)(M,N)
    rput(0,0){useboxIBox}
end{pspicture}


% Specify the cropping area.

defL{-2}
defB{-1.5}
defR{2}
defT{3}

begin{pspicture}[showgrid=false](L,B)(R,T)
    begin{psclip}{psframe[linestyle=none,framearc=0.5,dimen=middle](L,B)(R,T)}
    rput(0,0){useboxIBox}
    end{psclip}
end{pspicture}
end{document}