This is the svg I use to put the front page on my scanned books.
It may well be that your requirement is more complex, but perhaps this will help. Oh FlightCrew (new ePubValidator) has told me to put the <svg ..> in <div></div>, but I've not got round to it yet
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="100%" height="100%" viewBox="0 0 600 800" preserveAspectRatio="xMidYMid meet">
<image width="600" height="800" xlink:href="cover.jpg"/>
</svg>
And - buy an iPad! They're really nice!
Iain