Oh, I see. I was reading DNSB's post and thinking you wanted to insert an actual image.
Now that I'm taking a closer look at Post #1:
Search: Fig\._([\d\.]+)
Replace: <a href="../Images/Fig_\1.jpg">Fig._\1</a>
That will get you what you "want".
BUT!!! Linking
directly to an image file won't work on an actual ereader (it doesn't even work in ADE).
You will want to point to the figure's location within the book, for example:
Chapter01.xhtml:
Code:
<p class="figuretitle">Figure 3.1</p>
<div class="image">
<img alt="Figure 3.1" id="Fig3.1" src="../Images/Fig_3.1.jpg"/>
</div>
Chapter30.xhtml:
Code:
<p>As you can see in <a href="../Text/Chapter01.xhtml#Fig3.1">Fig 3.1</a>, the cat is brown.</p>