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Old 05-31-2014, 05:58 AM   #5
Hitch
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Quote:
Originally Posted by benbash View Post
Thank you for the response. I really appreciate it. I will check out KindlePreviewer and update this thread on how it goes.

Thank you,
Ben Bash
Also, you should know that what's in the Kindle Publisher Guidelines has material that is ALSO intended solely for "real" publishers, by which I mean, companies that have publishing contracts directly with Amazon, like Random House, which FTP their ePUB books for subsequent conversion. It's companies like that, that can upload books larger than 50MB, and make use of the larger image sizes. Your image is being compressed, no matter WHAT setting you use in KG. (And, please note: will likely get compressed AGAIN, if the resulting mobi is uploaded via the KDP.) The 127gig limitation is, by and large, still in use.

To prove it to yourself, simply download the Preview mobi and use MOBIunpack to see the image file in the results. You're embedding that file wildly too large, by a factor of nearly ...lord, I can't even do the math this late at night. Reduce it, firstly, to at most 2560x1600 (use whichever dimension limiter suits you), and see what that gets you. That's the actual available rez for an HDX 8.9", and it will get you a lot of zoom-ability. Amazon adds to their dimensions the admonition to save the images "at a rez of 350ppi," even though the pixel-by-pixel dimension saving should put paid to that. Try that.

Trying an image that's 25mexapixels is just...too much. At least start by reducing the figures by half, and work down from there to get to a suitable resolution. You are, after all, trying to cram a 20" x 14" image (more or less) onto a very small screen, in the case of most readers. Going from 280 square inches of image to a screen that, on average, has 16.62" of square inch space is a pretty big cram. Like all images that are either enlarged far beyond their original pixels, or reduced in the other direction by the same amount, "images of text" will become heavily pixilated or fuzzy (also: if the text isn't anti-aliased, you'll run into issues there, as well).

Hope that helps. You can't expect the same type of image results from the iBooks app--which won't compress an image at all that's uploaded in an ePUB, to the results in a MOBI file, which ARE being compressed, and from your numbers, compressed quite a lot. You'll likely find you have to play with the image quite a bit, to get a result with which you are reasonably happy.

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