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Old 08-28-2010, 02:23 PM   #4
jswinden
Astrophotographer
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Join Date: Sep 2006
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I'm not sure where tomsem got his assumptions, but the contrast settings do help out with scanned black and white documents that were converted to PDFs.

Here is a complete set of five screenshots showing a scanned image PDF as viewed in all five contrast settings: Lightest, Lighter, Default, Darker, Darkest.

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Attached Thumbnails
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Name:	1-pdf-lightest-contrast.gif
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ID:	57280   Click image for larger version

Name:	2-pdf-lighter-contrast.gif
Views:	474
Size:	35.2 KB
ID:	57281   Click image for larger version

Name:	3-pdf-default-contrast.gif
Views:	437
Size:	36.5 KB
ID:	57282   Click image for larger version

Name:	4-pdf-darker-contrast.gif
Views:	413
Size:	35.5 KB
ID:	57283   Click image for larger version

Name:	5-pdf-darkest-contrast.gif
Views:	538
Size:	34.1 KB
ID:	57284  
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