Your problem is relatively easy to fix. It all depends on the book code (i.e., that further part after alt="").
Here's the solution, which you may have to adapt to your actual code.
1. [Very important] Make yourself a copy of the EPUB file, just in case.
2. [Just in case] Check the file with the
EpubCheck plugin.
3. Run the
Access-Aide plugin, where all your Egyptian hieroglyphics + all other images in the book will be displayed.
Yes, where there are hieroglyphs on the right insert manually numbering 1, 2, 3 etc. This will change the alt attribute (specifies an alternate text for an image).
4. Now just do the replacement
Code:
<p class="(.+?)"><img src="../images/00003.jpeg" alt="(\d+)"/>
to
Code:
<h1 title="\2"></h1><p class="\1"><img src="../images/00003.jpeg" alt="\2"/>
5. Generate a table of contents.
6. [Optional] Generate HTML table of contents.
Check your image code and adapt it to your book, as my solution is more educational (maybe useful to someone) than definitive.