Quote:
Originally Posted by j.p.s
If those maps are line drawings and are JPEGs, they should have been created as PNG. PNG line drawings generally take less space and look nicer than JPEGs of line drawings. It might be possible to clean up the JPEGs and convert to PNG, but JPEG artifacts would probably remain, adding ugliness increasing file size.
|
I second PNG for "artificial images":
https://www.mobileread.com/forums/sho...54&postcount=8
https://www.mobileread.com/forums/sho...3&postcount=30
https://www.mobileread.com/forums/sho...5&postcount=26
Although it is quite hard to go from JPG -> a clean PNG without the source. Once you go lossy, you can't really go back, the artifacts/damage was already done.
I really wish that with maps and diagrams, the dang publishers/authors would release the vector files. It would be SO MUCH nicer for people who like to go in and create some quality stuff.
In the print version of a book you won't get some tiny ant-sized thumbnail. You get a nice, large, crisp map.
Quote:
Originally Posted by j.p.s
(does EPUB even support uncompressed images?)
|
JPG, PNG, and GIF are the valid image types in an EPUB (and SVG, but I would consider that a different cup of tea).