home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.graphics:13682 alt.graphics:441 alt.graphics.pixutils:2896 alt.binaries.pictures.d:6123
- Newsgroups: comp.graphics,alt.graphics,alt.graphics.pixutils,alt.binaries.pictures.d
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!Sirius.dfn.de!hpux.rz.uni-jena.de!pfk
- From: pfk@rz.uni-jena.de (Frank Klemm)
- Subject: Re: Best way to scan in pictures? (Newbie question)
- Message-ID: <1993Jan12.162010.9043@rz.uni-jena.de>
- Sender: news@rz.uni-jena.de (The News)
- Nntp-Posting-Host: cnve.rz.uni-jena.de
- Reply-To: pfk@rz.uni-jena.de (Frank Klemm)
- Organization: University Jena, Germany
- References: <C0KI8n.57M@techbook.com>
- Date: Tue, 12 Jan 1993 16:20:10 GMT
- Lines: 76
-
-
- In article <C0KI8n.57M@techbook.com>, jamesd@techbook.com (James Deibele) writes:
- |> Here are my newbie questions which I hope somebody can answer so I can
- |> up the pose of "big brother the computer expert". :-)
- |>
- |> (1) What kind of scanner works best for scanning in photographs?
- |>
- Normal "Flachbett-Scanner" like the HP Desk Scan III work very well.
- Note, that is very difficult to scan rastered pictures like pictures in
- Books etc. Best results you got with an slide scanner. But this quality is
- much more than needed for displaying a picture on a computer monitor.
- |>
- |> (1a) How much do they cost? Is it possible to do a "good" job with one
- |> of those scanners I see advertised below $500? Below $1000? Or is any
- |> scanner under $10,000 (or $25,000, or whatever) pretty awful?
- |>
- About $1,500 I think. Slide scanners from $1,800 for 1000 dpi and 36mmx24mm
- until $15,000 for 5040dpi and 125mmx100mm
- |>
- |> (1b) Alternatively, do most large cities have print shops (or whatever)
- |> that do this type of work? If so, what's a reasonable price per
- |> picture? I've seen places that do OCR, but when I called, it turned
- |> out that it was cheaper to rekey (so I still have stacks of articles
- |> that I'm supposed to type in ... someday ... :-) ). The yellow pages
- |> seems to have only places that do OCR or "line art" under "scanning"
- |> and none of the print shops nearby seem to do image scanning.
- |>
- |> (2) Is it even possible to scan slides? I wouldn't think so ...
- |>
- |> (3) Given a decent scanner, do you have to do a lot of touchup work to
- |> get a decent photo on the computer screen?
- |>
- Yes, Gamma correction, Sharping, Noise reduction, Color correction, Resolution
- converting to get a normal format like 800x600 ...
- |>
- |> (4) I don't know anything about the Kodak CD cameras. Can someone
- |> outline the good and bad points of these? I assume that it's possible
- |> to read these into a Mac or PC somehow, but that might be a wrong
- |> assumption ...
- |>
- Pro:
- CD as media is good
- You can do digital processing from the pictures
- Cons:
- Only 100 pictures are supported (660 MB/ 3 MB each = 220 pictures ?????????)
- Expensive 1.50 DM (ca. $1) per picture
- Only 36mmx24mm
- Only up to 3072x2048
- Compression is ineffective (JPEG makes less than 1 MB, typical 800 kB)
- Copyrighted - sources are not distributed
- |>
- |> (5) GIF files always seem pretty large, but I understand that JPEG
- |> format loses some details. I've got all monochrome machines myself, but
- |> she's got a pretty snazzy Dell (running DOS and Windows) at work. What
- |> format works best for a SuperVGA card?
- |>
- GIFs are much bigger. The big data reduction consist of color quantization.
- Because GIF are 256 color pictures, they are the best result for 256 color displays.
- JPEG looks a little bit better than GIF on a True color or High color display. On
- a 256 color display vice versa, because JPEG dislike a postal color quantization.
- Note than JPEG are much smaller.
- Targa : GIF : JPEG
- 30 : 7 : 1 for normal color pictures
- 12 : 8 : 1 for B/W pictures
- |>
- |> (6) What's the best viewing program for a DOS box? Windows? (I'd say
- |> "best" was defined as good quality images fairly quickly, though some
- |> would probably prefer image quality or speed.)
- |>
- I use a self written program for the Speedstar to display Targa files in all
- available video modes (16 color, 256 colors, 32k and 16 M colors). Before I must
- convert the source to TARGA. This gives the best result. For quick view I use
- alchemy.
- |>
- Frank
-
-