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External
Since: Jul 01, 2004
Posts: 14
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(Msg. 1) Posted: Wed Jul 07, 2004 3:28 am
Post subject: How many times can I save a JPEG
Archived from groups: alt>comp>periphs>dcameras (more info?)
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External
Since: Jun 02, 2004
Posts: 44
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(Msg. 2) Posted: Wed Jul 07, 2004 3:28 am
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Each time you save the jpeg file the original's bits get a little weaker.
Eventually some of the blue bits get read as greenish bits and the dark red
bits become orange and yellow and the picture gets very low contrast.
If you keep copying the jpeg picture over and over from the last copy this
becomes accelerated. It is best to back up you originals as this also
degrades the original as if the copies are "stealing" ink or colour bits
from it. When the original has all the colours almost sucked out of it you
can restore them from the backup.
You should not need to restore the original more than every few years
though. Run the Windows defragmenter programme and you will increase the
colour depth on almost all but the most faded images.
"marlin" <marlinspike.nospam DeleteThis @verizon.net.nospam> wrote in message
news:_sHGc.30279$qw1.13802@nwrddc01.gnilink.net...
> How many times is it still ok to save a jpeg? Also, is there a loss of
data
> if you save as a new file instead of overwriting?
> Thanks,
> Richard
>
><!-- ~MESSAGE_AFTER~ --> |
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External
Since: Jul 01, 2004
Posts: 14
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(Msg. 3) Posted: Wed Jul 07, 2004 4:32 am
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Gymmy Bob" <nospamming.TakeThisOut@bite.me> wrote in message
news:o62dnbAA-O3XzHbdRVn-sA@golden.net...
> If you keep copying the jpeg picture over and over from the last copy this
> becomes accelerated. It is best to back up you originals as this also
> degrades the original as if the copies are "stealing" ink or colour bits
> from it. When the original has all the colours almost sucked out of it you
> can restore them from the backup.
What if I just have 3 resaves, do I still need to worry about losing
quality? What I do is, put the pics onto my computer, then have the
following saves
1 - (optional) - run noise reduction software, then save
2 - do all post processing, then save
3 - crop, save under a new file name, then print
If each time I save I select the highest JPEG quality, is this enough saves
to matter?
Thanks,
Richard<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jun 02, 2004
Posts: 44
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(Msg. 4) Posted: Wed Jul 07, 2004 4:32 am
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Just kidding you...totally....LOL
No! The previous image cannot be affected unless you edit it!
If you load and save a copy there will be no image quality lost unless you
use a higher jpeg compression mode.
Jpeg has many levels of compression starting from some that lose absolutely
no resolution or quality to level 10 that throws away some resolution to get
the size down to a fraction of the original. The loses in quality are done
very intelligently and most people cannot even notice where it has been
done.
"marlin" <marlinspike.nospam.DeleteThis@verizon.net.nospam> wrote in message
news:0pIGc.30546$qw1.25415@nwrddc01.gnilink.net...
> "Gymmy Bob" <nospamming.DeleteThis@bite.me> wrote in message
> news:o62dnbAA-O3XzHbdRVn-sA@golden.net...
> > If you keep copying the jpeg picture over and over from the last copy
this
> > becomes accelerated. It is best to back up you originals as this also
> > degrades the original as if the copies are "stealing" ink or colour bits
> > from it. When the original has all the colours almost sucked out of it
you
> > can restore them from the backup.
>
> What if I just have 3 resaves, do I still need to worry about losing
> quality? What I do is, put the pics onto my computer, then have the
> following saves
> 1 - (optional) - run noise reduction software, then save
> 2 - do all post processing, then save
> 3 - crop, save under a new file name, then print
>
> If each time I save I select the highest JPEG quality, is this enough
saves
> to matter?
> Thanks,
> Richard
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jul 01, 2004
Posts: 14
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(Msg. 5) Posted: Wed Jul 07, 2004 4:54 am
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Gymmy Bob" <nospamming DeleteThis @bite.me> wrote in message news:i9OdnfXdI5lLyXbdRVn-
> If you load and save a copy there will be no image quality lost unless you
> use a higher jpeg compression mode.
Even if I overwrite the previous version? What the heck are people
complaining about then? Other than being able to change the white balance,
why would I want to work in RAW? BTW, I was wondering what you were talking
about with backing up to original every few years.
Thanks,
Richard<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Dec 11, 2003
Posts: 102
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(Msg. 6) Posted: Wed Jul 07, 2004 4:54 am
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Wed, 07 Jul 2004 01:54:35 GMT, "marlin"
<marlinspike.nospam DeleteThis @verizon.net.nospam> wrote:
>"Gymmy Bob" <nospamming DeleteThis @bite.me> wrote in message news:i9OdnfXdI5lLyXbdRVn-
>> If you load and save a copy there will be no image quality lost unless you
>> use a higher jpeg compression mode.
That is not true.
It would be true if you change that to read "unless you use 'any'
compression. Using the same compression, such as 90 or 10 or the
second hash mark or ... will always decrease the quality each time
you save it.
My jpeg programs has an option that permits saving with 0
compression and therefore no losses occur. Not all programs have
that option. I've tried it and then done binary comparisons and I get
no change with each save.
Pj.
>
>Even if I overwrite the previous version? What the heck are people
>complaining about then? Other than being able to change the white balance,
>why would I want to work in RAW? BTW, I was wondering what you were talking
>about with backing up to original every few years.
>Thanks,
>Richard
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jul 02, 2003
Posts: 28
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(Msg. 7) Posted: Wed Jul 07, 2004 10:18 am
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Tue, 6 Jul 2004 21:26:46 -0400, "Gymmy Bob" <nospamming.TakeThisOut@bite.me> found
these unused words floating about:
>Each time you save the jpeg file the original's bits get a little weaker.
>Eventually some of the blue bits get read as greenish bits and the dark red
>bits become orange and yellow and the picture gets very low contrast.
>
>If you keep copying the jpeg picture over and over from the last copy this
>becomes accelerated. It is best to back up you originals as this also
>degrades the original as if the copies are "stealing" ink or colour bits
>from it. When the original has all the colours almost sucked out of it you
>can restore them from the backup.
>
>You should not need to restore the original more than every few years
>though. Run the Windows defragmenter programme and you will increase the
>colour depth on almost all but the most faded images.
>
Say Wha Foo' ???
Whatcha drinkin' or sniffin'?<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jul 08, 2003
Posts: 41
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(Msg. 8) Posted: Wed Jul 07, 2004 4:03 pm
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Gymmy Bob" <nospamming DeleteThis @bite.me> wrote in message
news:o62dnbAA-O3XzHbdRVn-sA@golden.net...
> Each time you save the jpeg file the original's bits get a little weaker.
> Eventually some of the blue bits get read as greenish bits and the dark
red
> bits become orange and yellow and the picture gets very low contrast.
That is a colorful explanation, but not a correct one. The compression
algorithm doesn't involve individual pixels. In any case, each new
compression does introduce some distortion. The distortions are additive.
>
> If you keep copying the jpeg picture over and over from the last copy this
> becomes accelerated. It is best to back up you originals as this also
> degrades the original as if the copies are "stealing" ink or colour bits
> from it. When the original has all the colours almost sucked out of it you
> can restore them from the backup.
>
> You should not need to restore the original more than every few years
> though. Run the Windows defragmenter programme and you will increase the
> colour depth on almost all but the most faded images.
>
>
> "marlin" <marlinspike.nospam DeleteThis @verizon.net.nospam> wrote in message
> news:_sHGc.30279$qw1.13802@nwrddc01.gnilink.net...
> > How many times is it still ok to save a jpeg? Also, is there a loss of
> data
> > if you save as a new file instead of overwriting?
> > Thanks,
> > Richard
> >
> >
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jun 02, 2004
Posts: 44
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(Msg. 9) Posted: Wed Jul 07, 2004 8:06 pm
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I wouldn't keep overwriting the original version personally. What if your
programme screws up? Then you have lost your original copy and it may not be
around.
"marlin" <marlinspike.nospam.TakeThisOut@verizon.net.nospam> wrote in message
news:vJIGc.30653$qw1.27709@nwrddc01.gnilink.net...
> "Gymmy Bob" <nospamming.TakeThisOut@bite.me> wrote in message
news:i9OdnfXdI5lLyXbdRVn-
> > If you load and save a copy there will be no image quality lost unless
you
> > use a higher jpeg compression mode.
>
> Even if I overwrite the previous version? What the heck are people
> complaining about then? Other than being able to change the white balance,
> why would I want to work in RAW? BTW, I was wondering what you were
talking
> about with backing up to original every few years.
> Thanks,
> Richard
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Dec 11, 2003
Posts: 102
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(Msg. 10) Posted: Wed Jul 07, 2004 8:06 pm
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Wed, 7 Jul 2004 17:06:51 -0400, "Gymmy Bob" <nospamming RemoveThis @bite.me>
wrote:
>I wouldn't keep overwriting the original version personally. What if your
>programme screws up? Then you have lost your original copy and it may not be
>around.
True. Your original images should be archived if possible as we
don't know what the future holds.
>
>"marlin" <marlinspike.nospam RemoveThis @verizon.net.nospam> wrote in message
>news:vJIGc.30653$qw1.27709@nwrddc01.gnilink.net...
>> "Gymmy Bob" <nospamming RemoveThis @bite.me> wrote in message
>news:i9OdnfXdI5lLyXbdRVn-
>> > If you load and save a copy there will be no image quality lost unless
>you
>> > use a higher jpeg compression mode.
>>
>> Even if I overwrite the previous version? What the heck are people
>> complaining about then? Other than being able to change the white balance,
>> why would I want to work in RAW? BTW, I was wondering what you were
>talking
>> about with backing up to original every few years.
>> Thanks,
>> Richard
>>
>>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jun 02, 2004
Posts: 44
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(Msg. 11) Posted: Wed Jul 07, 2004 8:08 pm
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Read a lot closer. How can making multiple generations affect the original
copy?
It was a joke.
"Marvin Margoshes" <physnospamchem DeleteThis @cloud9.net> wrote in message
news:10eob6dk26t5of2@corp.supernews.com...
>
> "Gymmy Bob" <nospamming DeleteThis @bite.me> wrote in message
> news:o62dnbAA-O3XzHbdRVn-sA@golden.net...
> > Each time you save the jpeg file the original's bits get a little
weaker.
> > Eventually some of the blue bits get read as greenish bits and the dark
> red
> > bits become orange and yellow and the picture gets very low contrast.
>
> That is a colorful explanation, but not a correct one. The compression
> algorithm doesn't involve individual pixels. In any case, each new
> compression does introduce some distortion. The distortions are additive.
> >
> > If you keep copying the jpeg picture over and over from the last copy
this
> > becomes accelerated. It is best to back up you originals as this also
> > degrades the original as if the copies are "stealing" ink or colour bits
> > from it. When the original has all the colours almost sucked out of it
you
> > can restore them from the backup.
> >
> > You should not need to restore the original more than every few years
> > though. Run the Windows defragmenter programme and you will increase the
> > colour depth on almost all but the most faded images.
> >
> >
> > "marlin" <marlinspike.nospam DeleteThis @verizon.net.nospam> wrote in message
> > news:_sHGc.30279$qw1.13802@nwrddc01.gnilink.net...
> > > How many times is it still ok to save a jpeg? Also, is there a loss of
> > data
> > > if you save as a new file instead of overwriting?
> > > Thanks,
> > > Richard
> > >
> > >
> >
> >
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jul 07, 2004
Posts: 6
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(Msg. 12) Posted: Thu Jul 08, 2004 7:46 am
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Tech TV they recommend saving your pictures to Tiff, which is a non
compressed file and therefore larger in size,
then doing all your editing, finally changing back to jpeg...
"marlin" <marlinspike.nospam RemoveThis @verizon.net.nospam> wrote in message
news:_sHGc.30279$qw1.13802@nwrddc01.gnilink.net...
> How many times is it still ok to save a jpeg? Also, is there a loss of
data
> if you save as a new file instead of overwriting?
> Thanks,
> Richard
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jul 08, 2003
Posts: 41
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(Msg. 13) Posted: Thu Jul 08, 2004 2:37 pm
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"Gymmy Bob" <nospamming RemoveThis @bite.me> wrote in message
news:V9adnc9-p6iq-3HdRVn_iw@golden.net...
> Read a lot closer. How can making multiple generations affect the original
> copy?
> It was a joke.
>
It can be hard to tell a joke from misinformation. You might add a smiley
icon the next time.
> "Marvin Margoshes" <physnospamchem RemoveThis @cloud9.net> wrote in message
> news:10eob6dk26t5of2@corp.supernews.com...
> >
> > "Gymmy Bob" <nospamming RemoveThis @bite.me> wrote in message
> > news:o62dnbAA-O3XzHbdRVn-sA@golden.net...
> > > Each time you save the jpeg file the original's bits get a little
> weaker.
> > > Eventually some of the blue bits get read as greenish bits and the
dark
> > red
> > > bits become orange and yellow and the picture gets very low contrast.
> >
> > That is a colorful explanation, but not a correct one. The compression
> > algorithm doesn't involve individual pixels. In any case, each new
> > compression does introduce some distortion. The distortions are
additive.
> > >
> > > If you keep copying the jpeg picture over and over from the last copy
> this
> > > becomes accelerated. It is best to back up you originals as this also
> > > degrades the original as if the copies are "stealing" ink or colour
bits
> > > from it. When the original has all the colours almost sucked out of it
> you
> > > can restore them from the backup.
> > >
> > > You should not need to restore the original more than every few years
> > > though. Run the Windows defragmenter programme and you will increase
the
> > > colour depth on almost all but the most faded images.
> > >
> > >
> > > "marlin" <marlinspike.nospam RemoveThis @verizon.net.nospam> wrote in message
> > > news:_sHGc.30279$qw1.13802@nwrddc01.gnilink.net...
> > > > How many times is it still ok to save a jpeg? Also, is there a loss
of
> > > data
> > > > if you save as a new file instead of overwriting?
> > > > Thanks,
> > > > Richard
> > > >
> > > >
> > >
> > >
> >
> >
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jun 02, 2004
Posts: 44
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(Msg. 14) Posted: Thu Jul 08, 2004 8:53 pm
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I figured it was so ridiculous that any fool would catch on.....oops!
I don't do smiley icons
LOL
"Marvin Margoshes" <physnospamchem DeleteThis @cloud9.net> wrote in message
news:10eqr68giuqdu8a@corp.supernews.com...
>
> "Gymmy Bob" <nospamming DeleteThis @bite.me> wrote in message
> news:V9adnc9-p6iq-3HdRVn_iw@golden.net...
> > Read a lot closer. How can making multiple generations affect the
original
> > copy?
> > It was a joke.
> >
> It can be hard to tell a joke from misinformation. You might add a smiley
> icon the next time.
>
> > "Marvin Margoshes" <physnospamchem DeleteThis @cloud9.net> wrote in message
> > news:10eob6dk26t5of2@corp.supernews.com...
> > >
> > > "Gymmy Bob" <nospamming DeleteThis @bite.me> wrote in message
> > > news:o62dnbAA-O3XzHbdRVn-sA@golden.net...
> > > > Each time you save the jpeg file the original's bits get a little
> > weaker.
> > > > Eventually some of the blue bits get read as greenish bits and the
> dark
> > > red
> > > > bits become orange and yellow and the picture gets very low
contrast.
> > >
> > > That is a colorful explanation, but not a correct one. The
compression
> > > algorithm doesn't involve individual pixels. In any case, each new
> > > compression does introduce some distortion. The distortions are
> additive.
> > > >
> > > > If you keep copying the jpeg picture over and over from the last
copy
> > this
> > > > becomes accelerated. It is best to back up you originals as this
also
> > > > degrades the original as if the copies are "stealing" ink or colour
> bits
> > > > from it. When the original has all the colours almost sucked out of
it
> > you
> > > > can restore them from the backup.
> > > >
> > > > You should not need to restore the original more than every few
years
> > > > though. Run the Windows defragmenter programme and you will increase
> the
> > > > colour depth on almost all but the most faded images.
> > > >
> > > >
> > > > "marlin" <marlinspike.nospam DeleteThis @verizon.net.nospam> wrote in message
> > > > news:_sHGc.30279$qw1.13802@nwrddc01.gnilink.net...
> > > > > How many times is it still ok to save a jpeg? Also, is there a
loss
> of
> > > > data
> > > > > if you save as a new file instead of overwriting?
> > > > > Thanks,
> > > > > Richard
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
><!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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External
Since: Jul 02, 2003
Posts: 28
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(Msg. 15) Posted: Fri Jul 09, 2004 12:08 pm
Post subject: Re: How many times can I save a JPEG [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Thu, 8 Jul 2004 17:53:30 -0400, "Gymmy Bob" <nospamming DeleteThis @bite.me> found
these unused words floating about:
>I figured it was so ridiculous that any fool would catch on.....oops!
>
>I don't do smiley icons
>
>
... a <G> fills the bill.<!-- ~MESSAGE_AFTER~ --> >> Stay informed about: How many times can I save a JPEG |
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