Quote:
Originally Posted by _Ea_
How does the mobipockets format handle images? Like jpg's in an html file?
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MobiPocket originally only supported GIFs, and converted everything to GIF. They also tended to have small images, partially because of a small screen customer base and partially from a ~62KB image size limit. They now support, and favor, JPEG. Usually of any size, although some old devices may still need the images to be less than 62KB.
I can see advantages to customizing images for the target device, but in many cases I think the best approach is now to use as large a good quality image as possible e.g. 1024x1024 JPEGs. If it is in color, leave it in color. I do see advantages in "optimizing" the colors for 4-16 grey scales, if that can be done without relying on the details of how the device downscales. Screen resolutions will get higher, and screens may get a bit bigger. LCD 7" screens started out as 480x800, but now 600x1024 is common. A 9.7" E-Ink screen will be 825x1200. Also, some screens will be in landscape and others in portrait orientation.