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Old 10-27-2014, 05:29 PM   #4
phossler
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Posts: 1,087
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Join Date: Jan 2009
Location: Valley Forge, PA, USA
Device: Kindle Paperwhite
Quote:
It is not the resolution....I can adjust the resolution 100, 200, 300, etc.
It isn't that. When I save, I have a slide bar from least to best, and there is a 10x difference in size of file, but when I open the file, it still shows the same resolution.
JPEG is a 'lossy' format.

When you are saving the image from some kind of editor, you can usually select a degree of compression, or quality ("least -- normal -- best").

The lower the quality, the more highly compressed the image will be, but smaller file size

Not my field, but I'd expect the reader's dpi, as well and the horizontal/vertical pixel count to get involved also

Edit -- this is an interesting read about covers, but I think it would apply to any picture

http://www.thebookdesigner.com/2012/...of-resolution/

Last edited by phossler; 10-27-2014 at 05:43 PM.
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