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Is there an ideal image size in iBooks Author?

378 Views 12 Replies Latest reply: Oct 14, 2013 5:23 PM by vinnyvg RSS
Bisonwerks Level 1 Level 1 (0 points)
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Oct 12, 2013 1:23 PM

Over the years, I have used various cameras and scanners collecting images in my research.  I just checked a random sample of the sizes of several images I have in iPhoto.

The sizes of the originals runs the gamut:  I have some as small as 468 x 624 pixels=119KB, to huge ones up to as large as 7000 x 5096=7.2 MB.

 

The book I am planning will eventually contains hundreds of photos, but I fear running into the 2.0 Gig cap for the book--which would interefere with the size limit to be sold on the iBooks bookstore.

 

Can anyone point me to a page of standards, defining what optimum sizes are for my image files?  I know that it is best to complete any editing on the images prior to importing them into iBA. 

 

I want the photos to be able to be zoomable to full page on iPads and MacBooks with Retina displays.  I want to make the flies smaller, but still maintian the integrity of the images.

 

Also, is there an ideal resolution?  A friend suggested 72 dpi. Many of the scans are at 300dpi. 

 

I may have to serialize the book and divide the book into separate editions, but I'd really rather not do it that way.

MacBook Pro with Retina display, iOS 6.1.4, Pages
  • K T Level 7 Level 7 (23,215 points)
    Currently Being Moderated
    Oct 12, 2013 1:34 PM (in response to Bisonwerks)

    Optimizing performance in your iBooks Author books [ support.apple.com/kb/HT5117 ]

     

    Remember, best to use jpegs for digital photos and pngs for vector images, etc.

     

    >A friend suggested 72 dpi. Many of the scans are at 300dpi.


    Anything over 72 is wasted. As always, test your content in your book on a device to confirm any recipe you may come up with.

     

    But yes, if you're committed to content that tasks the 2gb ceiling, plan ahead for serailized editions.

  • K T Level 7 Level 7 (23,215 points)
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    Oct 12, 2013 7:42 PM (in response to Bisonwerks)

    I use Preview and GraphicConverter, which has a great batch feature.

  • vinnyvg Level 4 Level 4 (1,550 points)
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    Oct 12, 2013 7:52 PM (in response to Bisonwerks)

    Maximum single image size for iBa is 3.2 megapixels or 2048 x 1536 ( switch for potrait ) resolution can be 72dpi  upwards depending on what you seek to achieve and if you allow  zooming.

     

    Any image editor you  have ( I think Gimp is still a free download)  will do the  job and a makeshift is the lowly "Preview" image  viewer on every iMac.

     

    If you  have multiple  images on a page  ie 4 images  you can still use the full size image or edit them down to 1024 x 768 or even 512 x 384  and they will still be OK. 

     

    If you need to edit content to meet the 2 gig max, it may help if you  make notes of which images need to be what size to suit your needs and edit them accordingly. Better to do it at the start than fire fighting  mid way.

  • K T Level 7 Level 7 (23,215 points)
    Currently Being Moderated
    Oct 12, 2013 7:54 PM (in response to Bisonwerks)

    Again, anything over 72 dpi is wasted - anything higher risks unnecessary bloating.

  • vinnyvg Level 4 Level 4 (1,550 points)
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    Oct 13, 2013 6:40 PM (in response to Bisonwerks)

    If you intend to make more than one book, then the possible need to buy other software may be essential.

    If the books sell, then eventually they  pay back the investment.

     

    A free option is  the Preview on all Macs,  it  allows  more or less the same image colour/ exposure/contrast/etc as the image editor in iBA and  it allows to to resize images.  

    I use Photoshop or PS Elements to bulk process all the images I set up for the next book and after I often just  use the preview to tweak colour etc or crop down. Its easier than opining an app and  then searwching   to  open an image. With Preview all I do is click teh images and it opens.

     

    I do a think iBA would benefit  from having a resize/crop tool added.. I have submitted  Feedback to that effect...

  • vinnyvg Level 4 Level 4 (1,550 points)
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    Oct 14, 2013 4:10 PM (in response to Bisonwerks)

    Use the  App icon in your iMac to open the  app store.... check out PIXELMATOR..

    It will do anything you need.. its basically a mini Photoshop!  Cost is around $15  (£10.50 is what I see)

     

    They also do a " Learn Pixelmator" Manual app - for another £2.99.

  • vinnyvg Level 4 Level 4 (1,550 points)
    Currently Being Moderated
    Oct 14, 2013 5:23 PM (in response to Bisonwerks)

    Pleased you  can  now move on with your project,  maybe let us know when its  in the store.

     

    Good Luck with your project book,  and if needed we are always here...

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