Quote:
Originally Posted by ldolse
Topaz is the only option that does what you want exactly the way you describe.
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He might want to consider djvu as a format. It's useful for scanned books. I think of it as a cross between PDF and Topaz. It has multiple layers and divides the book into images and text. It compresses the images, like PDf, but it also handles scanned images of individual letters, sort of like Topaz. It compresses the first individual letter image it finds, then locates all the similar images of that letter on the page and links to the single scanned image of that letter. That way it doesn't have to store an image of the entire page, nor multiple images of the same letter.
The multiple layers allows a low res image (100dpi IIRC) to be displayed as you scroll through the pages quickly, and then the high res image gets overlaid as you stop. It's open source. Wikipedia has a summary article on it I believe.