|
Interesting analysis, tomsem.
On my PW2 the images from KFX books are in a separate KFX file in the assets/attachables subdirectory of the book's sdr directory. These are not obfuscated and can be found easily within the file. Comparing these KFX images with those from the corresponding AZW3 file downloaded from Amazon's web site shows some major differences. The images from the KFX file are highly compressed in JPEG-XR format. Also, most (but strangely not all) are reduced to black-and-white.
Amazon is taking customization of book files delivered to individual devices to an extreme. This may make it difficult in the future to get the "best" version of a book for those who want to archive books or convert them to another format.
|