11-21-2015, 06:26 PM | #1 |
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Math Equations are Unreadable
Hello,
I am just starting with Calibre so that I can manage my ebooks more easily. It looks like a fantastic tool! I have a favorite kindle engineering text book file with extension azw, and file size about 20MB. When I import it into Calibre (with the DeDRM plug-in installed), a .htmlz file is created. If I open the .htmlz file using Calibre, it takes a few minutes to open completely to where I can navigate. Additionally, the math font for the equations does not display in a readable format. When I displayed the ebook in Kindle, the math font was readable and understandable, so it seems that something was lost in the import/conversion. I unzipped the htmlz file and tried to insert the following html code into the main html file: <!-- This script tag is needed to make calibre's ebook-viewer recpgnize that this file needs math typesetting --> <script type="text/x-mathjax-config"> // This line adds numbers to all equations automatically, unless explicitly suppressed. MathJax.Hub.Config({ TeX: { equationNumbers: {autoNumber: "all"} } }); </script> The results were no change in the readability. I also tried convert the .htmlz file into .epub with no success in being able to read the equations. If anybody might know how to solve this problem, I would be very grateful for your response. |
11-21-2015, 10:40 PM | #2 |
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Sounds like the book was one of the fortunately-rare Topaz books.
They are essentially a series of images with OCR data, and when DeDRMed they become HTMLZ files instead of the more usual AZW3/MOBI. There is literally nothing you can do about them -- they never had the data to begin with, but you thought they did because of the pictures. If you take a look at the raw HTML, you will probably find that there is no actual Mathjax there -- not to mention, Kindles don't actually support Mathjax to begin with, so that was never your problem... |
11-23-2015, 09:58 PM | #3 |
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Hi eschwartz,
Thank you for your response. It has helped me to understand the problem. |
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