Quote:
Originally Posted by Wolofoloto
My questions are . . .
1) What is the optimal size for a picture per page?
|
Most Kindle devices have 600x800 pixel screens. This means that the initial presentation of the image would need to be somewhat smaller to allow your text description to appear on the same screen, if that is desired. Kindles have a "tap-to-zoom" function that enlarges any image to full screen. You could create 600x800 images and size them smaller in the ePub using
height and
width attributes in the
<img> tag allowing the full resolution to be used when the user clicks on the image.
The AZW/MOBI format is limited to 128k images as a maximum (the new KF8 format may raise this bar, but most Kindles can't use the KF8 segment and fall back to the segment using the older format). It is best to make sure you size your images somewhat below this limit using a high quality image editor (e.g. Photoshop) to avoid having the ePub>MOBI converter to a quick-and-dirty image resize.
The images' PPI settings (often incorrectly labeled DPI by even the most expensive apps) is irrelevant. It is no bearing on image quality unless there is an inch size forced on an image, which of course is not the case with any digital screen display of an image.
Quote:
|
3)Would 100 pictures per book be enough for a book? (Have roughly 400 high res aviation pictures , roughly 25 meg each)
|
I can't help you there.
Quote:
|
4) What are the ideal tools to use right now?
|
Tools are a personal choice. These are my primary choices:
- Kindle Previewer 2 - It is critical to use this tool to preview a MOBI conversion. No other ereader app is as reliable a proofing tool. It can also be used to convert an ePub to MOBI.
- Sigil - This is an excellent tool for building the ePub. If you should choose to use another tool to build the initial ePub you'll still find Sigil valuable for editing and validating the ePub.
- Calibre - This is an excellent tool for converting between formats. It performs some formatting steps automatically; steps that require some manual effort when using other tools.
- Photoshop - This one is decidedly not free (the others on my list are free) but is the best tool for scaling and cropping to shape. If you use Photoshop, save the images you intend to place in the ebook using its "Save for Web & Devices" option and not the regular Save and Save As... options. The latter two include a lot of unnecessary metadata and ancillary data in the files that is not needed in an ebook, making the images bulkier than necessary.
These tools are all you actually need, provided you are building an ePub as your source document.