Quote:
Originally Posted by Robertb
Dear John:
We do not MAKE eBooks, we make devices. By now, people on this forum are aware of that. What I am getting at is that as grey scale rises and formats permit more pdf... books can be expected to grow larger as illustrations that may have been left out when first turned into eBooks from print are now included. Please do not jump to "weird implementation". It appears to us here that file sizes are getting bigger and the IDPF said the same thing at the industry's biggest meeting.
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Even though the readers only display 4 or 8 or 16 shades of gray, the ebooks (especially) PDF ebooks made for viewing on a computer) may be stored as 24 bit color images rather than 4 bit gray scale images. That will cause them to be 6 times larger (uncompressed). If the ebook images are made as 4 bit gray scale (i.e. made for e-ink readers) then the ebooks with images will be correspondingly smaller.
This is something for the publishers to consider unless you want to pre-process all the images in your ebooks. With most of the books I read, the only images are maps of some sort, and unless I bookmark them for future reference, they are mostly useless. For that reason I often just leave them out when converting the format for my personal reading.
Some printed books used to have a black & white drawing at the beginning of each chapter but it's been a long while since I've seen any like that. Some of the classics that HarryT works on may very well still have that though.