Digital BW, The Print

In a message dated 11/21/07 8:47:03 AM, cowpercam@... writes:


> I find it convenient to store text pages from the occasional magazine
> article as a B&W jpg image.  [Rather than storing a bulky stack of
> mags]  Trouble is that uneven or dim "convenience" lighting or an
> unflat page near the centre staples often causes a grey gradient on
> part of the text. This spoils it for OCR or spoils the appearance when
> reading it later.
> Can Photoshop or similar do something that just leaves black print on
> a white page?  ie remove the gradient?
> 

Only at the cost of seriously degrading the text legibility. The better trick 
to to put a black sheet behind the page before scanning, so that there is far 
less back-print bleedthough. If this is a black matte board, it will also 
help flatten the page at the binding, minimizing the gradient at the edge. Then, 
adjust the whitepoint on this better scan, to further improve legibility.

C. David Tobie
Product Technology Manager
Digital Imaging & Home Theater
Datacolor Inc.
CDTobie@...
www.datacolor.com/spyder3


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