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 19:26:18 GMT
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Viewed:
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1445 times
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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 that has all the same information as the
original? In other words, don't compress the compressed image, just rotate
it.
Mike
Kevin Loch <kloch@opnsys.com> wrote in message news:FK0KB7.1Fs@lugnet.com...
> 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 is in Reply To:
 | | Re: Scans uploaded, critique wanted
|
| 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 (...) (25 years ago, 22-Oct-99, to lugnet.db.scans)
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