That's a good question - sometimes the auto conversion can be poor because the cover is mostly color contrasts rather than intensity contrast. But in general I've found that the CyBook's conversion is as good as manual conversion.
Also, JPEGs don't encode 2-bit greyscale, they reconvert to 8-bit greyscale, so to keep the exact conversion to 2-bit you need to save as GIF. And a 600x800 2-bit GIF is 120K before GIF compression comes into play, which means that not all such pictures will make it under the 61KB limit.
In short, I've found that keeping it at full colour and using JPEG compression is more reliable and gives as good results as a manual conversion to 2-bit greyscale. And it means that the covers will also look good on colour eBook readers.
Paul
Quote:
Originally Posted by Elsi
Hey thanks. I'll download yours and poke at them a bit. I went ahead and changed the image that I had to 4-level greyscale instead of relying on the device to do it for me. Wonder what that would do to the images you posted?
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