Subject:
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Re: Scans uploaded, critique wanted
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Newsgroups:
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lugnet.db.scans
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Date:
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Fri, 22 Oct 1999 16:54:43 GMT
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Viewed:
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1328 times
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That sounds like a good idea BUT,
When you start with a JPEG, do something (even lossless rotation),
and recompress as JPEG you exaggerate the JPEG artifacts. This is why
it's important for the original scanner to rotate/crop/size the images
BEFORE saving in a lossy format like JPEG.
Of course I couuld rotate/resize/crop the JPEG's and save them in a
lossless format like PNG...
KL
In lugnet.db.scans, Mike Faunce writes:
> Kevin,
>
> Have you ever thought about just rotating the scans you have? I use a
> Windows shareware program called Firehand Ember that allows you to rotate an
> image (GIF, JPG, BMP and others)with no noticeable image quality loss
> (amount other things). It just takes the pixel values and rotates them
> 90/180/270 degrees. This way you aren't at the mercy of the scanner or some
> kind soul to re-scan the images that you already have.
>
> (If you are looking for volunteers, just ask and I'll do a couple so you can
> see the results).
>
> Mike
>
> Kevin Loch <kloch@NOSPMkl.net> wrote in message
> news:37CD9948.9BA27A86@NOSPMkl.net...
> >
> > They look great except for
> > http://www.brickshelf.com/scans/catalogs/b93usc/b93usc-12.jpg
> > which is not oriented in the proper direction. That makes is very
> > difficult to read
> > on the screen.
> >
> >
> > KL
> >
> > Jeff Stembel wrote:
> > >
> > > Woohoo! First to Post! ;)
> > >
> > > I just uploaded some items to brickshelf.com, and I wanted to know what • people
> > > thought of my scanning technique. The four most recent additions are • mine.
> > >
> > > The three sets were scanned in at either 75(most likely) or 100 dpi, • while the
> > > Birthday surprise was scanned in at 100 dpi. All had the 'Descreen' set • to
> > > 'Magazine(133 lpi)'. Does anyone see anything I can improve upon? • Thanks!
> > >
> > > Jeff
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Message has 2 Replies:
 | | Re: Scans uploaded, critique wanted
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| See if this makes sense. One of the options in Ember is to set the JPEG compression ratio. If you start with the JPEG image (suppose it's at 70%), then rotate it, then save it with a ratio of 100% (no compression), would that end up with a picture (...) (25 years ago, 22-Oct-99, to lugnet.db.scans)
| | | Re: Scans uploaded, critique wanted
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| (...) There is a program called jpegtran which will rotate JPEGs by any multiple of 90 degrees without decompressing the file, i.e. just by moving bits around in the jpg file. This means that there is _no_ loss in quality. But (there always is a (...) (25 years ago, 27-Oct-99, to lugnet.db.scans)
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Message is in Reply To:
| | Re: Scans uploaded, critique wanted
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| Kevin, Have you ever thought about just rotating the scans you have? I use a Windows shareware program called Firehand Ember that allows you to rotate an image (GIF, JPG, BMP and others)with no noticeable image quality loss (amount other things). It (...) (25 years ago, 21-Oct-99, to lugnet.db.scans)
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