documentclass[tikz,border=2mm]{standalone}
usetikzlibrary{positioning}

begin{document}
begin{tikzpicture}
node (A) {includegraphics{hKBg1}};
fill[white] ([shift={(1.5,0.5)}]A.south west) rectangle ([shift={(4,1.6)}]A.south west);
end{tikzpicture}
end{document}