Also,in my study I've come across conflicting data.
Some sites say epub accepts only SVG files, others say PNG.
Both are low compression file formats, and in my opinion not the best for mobile books.
.jpg files should be a lot better for reading devices, jpeg2000 for photo realistic pictures, and gif for simplistic, anime-like graphics.
I'm perplexed that ePub originally wasn't made to support these major formats, eventhough (al)most (all) devices support those formats from their OS.
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