PDF image files and htlatex with escaped characters in filenames

I'm preparing a TeX document including PDF figures as an HTML document. The solution to this question works fairly well:

PDF image files and htlatex

However it does not handle image filenames with "(" or ")" characters, is there a way to include these in an HTML document?

The filenames needs to be escaped, because the special characters, such as "(" or ")" may cause problems in the conversion step, which is executed by system shell. Something like this happens on Linux:

System call: convert he(ll)o.pdf he(ll)o.png
sh: -c: line 0: syntax error near unexpected token ,,("
sh: -c: line 0: convert he(ll)o.pdf he(ll)o.png'


MWE:

\documentclass{article}
\usepackage{graphicx}

\begin{document}
\includegraphics{hello.pdf}
\includegraphics{"he(ll)o"}
\includegraphics{he(ll)o.pdf}
\end{document}


Fixed configuration file:

\Preamble{xhtml}
\Configure{graphics*}
{pdf}
{\Needs{"convert '\csname Gin@base\endcsname.pdf'
'\csname Gin@base\endcsname.png'"}%
\Picture[pict]{\csname Gin@base\endcsname.png}%
\special{t4ht+@File: \csname Gin@base\endcsname.png}
}
\DeclareGraphicsExtensions{.pdf,.png,.jpg,.eps}
\begin{document}
\EndPreamble


And the result:

• Follow up query: Is this able to take PDFs in other directories? e.g., with \includegraphics{{"/home/tomkelly/directory/image".pdf}}` – Tom Kelly May 11 '17 at 15:42