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Article #1670Re: Please Post Responses (Was: Re: Inquiry about closeout scanners
From: Anders Thulin
Date: Thu, 26 Jul 1990 18:05
Date: Thu, 26 Jul 1990 18:05
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1311 bytes
In article <676@venice.SEDD.TRW.COM> ries writes:
> The point being that if you
>can only print 15 different grey-scales, what good is a 256 grey-scale scanner.
>Similar args might be made for a scanner supporting more that 300dpi if
>your printer is limited to 300dpi.
>
>Anyway, Is this hogwash or ?
If you scan only in order to print it out on a 300 dpi printer, it's
probably true.
If scan in order to examine the result on a monitor it is not. The eye
can distinguish between 30-50 (?) levels of grey.
And if you scan in order to do image processing (enhancement, filtering)
you definitely want as many grayscales as possible.
--
Anders Thulin ath@prosys.se {uunet,mcsun}!sunic!prosys!ath
Telesoft Europe AB, Teknikringen 2B, S-583 30 Linkoping, Sweden
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arc1-ca.pugleaf.net!utzoo!attcan!uunet!wuarchive!zaphod.mps.ohio-state.edu!samsung!cs.utexas.edu!rice!uupsi!sunic!liuida!prosys!athReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!wuarchive!zaphod.mps.ohio-state.edu!samsung!cs.utexas.edu!rice!uupsi!sunic!liuida!prosys!ath From: ath@prosys.se (Anders Thulin) Newsgroups: comp.text Subject: Re: Please Post Responses (Was: Re: Inquiry about closeout scanners Message-ID: <532@helios.prosys.se> Date: 26 Jul 90 18:05:29 GMT References: <2313@nic.MR.NET> <676@venice.SEDD.TRW.COM> Organization: Telesoft AB, Teknikringen 2A, S-583 30 Linkoping, Sweden Lines: 21