Help: scanning old computer manuals

From: Chuck McManis <cmcmanis_at_mcmanis.com>
Date: Sun Feb 7 20:50:53 1999

At 03:56 PM 2/7/99 -0800, James Willing wrote:
>Screens are apx. 72 dots per inch. When the browser tries to interpolate
>your 300dpi scans, it all goes to heck! (ruled by that guy with the spoon
>from 'Dilbert')

Sorry Jim, this suggestion is incorrect. The issue with scanning 300 DPI
line art is that typically (and I know this to be the case with Umax
scanners using Umax software) the image is scanned as a binary black and
white image.

Now when you "reduce" it to 72 - 100 DPI (which is screen resolution) if
you retain the black and white mode then you will get crap. This is because
you lose a lot of information. However, if you change the image to be an 8
bit grey scale image at the same time you resample it, then it will look
reasonable because the program can use antialiasing techniques to preserve
the information in the image.

--Chuck
Received on Sun Feb 07 1999 - 20:50:53 GMT