how to stop JPEG loss

Just viewing a jpeg file will not cause any loss. You're just reading the
file when viewing, not modifying it. It's only when the file is changed,
such as when using Photoshop.

Don

<drs RemoveThis @canby.com> wrote in message
news:9t7op0d1qijb263186qn5n0kbbl9a4us2d@4ax.com...
 > Is there an easy way to lock a jpeg file so it doesn't lose data when
 > it's viewed multiple times? I don't have PhotoShop or any similar
 > programs. Simply changing the filename won't prevent loss, will it?<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

drs.TakeThisOut@canby.com wrote:
 > Is there an easy way to lock a jpeg file so it doesn't lose data when
 > it's viewed multiple times? I don't have PhotoShop or any similar
 > programs. Simply changing the filename won't prevent loss, will it?

Sigh.

One more time

VIEWING A JPG PHOTO DOES NOT, REPEAT; NOT, degrade quality, only
repeated editing and saves degrade quality. You can view the photo a
million times and it will display the same each time.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

First, let me said I don't know what I'm talking about. But I've been
told by folks who know more than I that opening and closing jpegs will
change the data. One sent me this link this morning:
<a style='text-decoration: underline;' href="http://www.pixelp.com/watches/ps-tips/" target="_blank">http://www.pixelp.com/watches/ps-tips/</a>



On Wed, 17 Nov 2004 23:18:55 -0500, "Donald Patrylow"
<fotodon RemoveThis @comcast.net> wrote:

 >Just viewing a jpeg file will not cause any loss. You're just reading the
 >file when viewing, not modifying it. It's only when the file is changed,
 >such as when using Photoshop.
 >
 >Don
 >
 ><drs RemoveThis @canby.com> wrote in message
 >news:9t7op0d1qijb263186qn5n0kbbl9a4us2d@4ax.com...
  >> Is there an easy way to lock a jpeg file so it doesn't lose data when
  >> it's viewed multiple times? I don't have PhotoShop or any similar
  >> programs. Simply changing the filename won't prevent loss, will it?
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

drs.TakeThisOut@canby.com wrote:

 > First, let me said I don't know what I'm talking about. But I've been
 > told by folks who know more than I that opening and closing jpegs will
 > change the data. One sent me this link this morning:
<font color=purple> > <a style='text-decoration: underline;' href="http://www.pixelp.com/watches/ps-tips/</font" target="_blank">http://www.pixelp.com/watches/ps-tips/</font</a>>
 >

Closing a jpeg is not SAVING it.. (ie Click on 'File' -> 'Save')

It says SAVEing JPEGS in the URL you've shown, not closing JPEGS.

Saving is what causes the degradation because the lossy compression
takes place during the SAVE.

Consider the internet.. Every time someone accesses a web site with
jpeg images, the images are are opened by the hosts HTTP server which
then transmits them to the client who views them on his/her browser.

Some sites get *millions* of hits per year. Despite being opened and
closed MILLIONS of times, the jpeg images are unchanged.

It would be a nightmare if webmasters had to constantly replace their
'worn out' jpegs on a regular basis because they were viewed too much <!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

Sure, but unless I'm out to lunch, the guy says repeatedly:
2. open (1) and save as a JEPG
3. open (2) and save as a JEPG etc..
In fact the pic has been saved 5 times if I can count... or did I miss
something?
Marcel

<drs DeleteThis @canby.com> wrote in message
news:scipp0d716vrdu48ni82qt1jj03vp2530u@4ax.com...
 > First, let me said I don't know what I'm talking about. But I've been
 > told by folks who know more than I that opening and closing jpegs will
 > change the data. One sent me this link this morning:
<font color=purple> > <a style='text-decoration: underline;' href="http://www.pixelp.com/watches/ps-tips/</font" target="_blank">http://www.pixelp.com/watches/ps-tips/</font</a>>
 >
 >
 >
 > On Wed, 17 Nov 2004 23:18:55 -0500, "Donald Patrylow"
 > <fotodon DeleteThis @comcast.net> wrote:
 >
  > >Just viewing a jpeg file will not cause any loss. You're just reading
the
  > >file when viewing, not modifying it. It's only when the file is changed,
  > >such as when using Photoshop.
  > >
  > >Don
  > >
  > ><drs DeleteThis @canby.com> wrote in message
  > >news:9t7op0d1qijb263186qn5n0kbbl9a4us2d@4ax.com...
   > >> Is there an easy way to lock a jpeg file so it doesn't lose data when
   > >> it's viewed multiple times? I don't have PhotoShop or any similar
   > >> programs. Simply changing the filename won't prevent loss, will it?
  > >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

On Thu, 18 Nov 2004 11:24:15 -0500, "Marcel" <cosmar.TakeThisOut@rogers.com>
wrote:

 >Sure, but unless I'm out to lunch, the guy says repeatedly:
 >2. open (1) and save as a JEPG
 >3. open (2) and save as a JEPG etc..
 >In fact the pic has been saved 5 times if I can count... or did I miss
 >something?
 >Marcel

Is that different than simply opening and closing it? Doesn't that
automatically save it again as a JPEG?<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

On Thu, 18 Nov 2004 08:36:22 -0800, drs.RemoveThis@canby.com wrote:

 >On Thu, 18 Nov 2004 11:24:15 -0500, "Marcel" <cosmar.RemoveThis@rogers.com>
 >wrote:
 >
  >>Sure, but unless I'm out to lunch, the guy says repeatedly:
  >>2. open (1) and save as a JEPG
  >>3. open (2) and save as a JEPG etc..
  >>In fact the pic has been saved 5 times if I can count... or did I miss
  >>something?
  >>Marcel
 >
 >Is that different than simply opening and closing it? Doesn't that
 >automatically save it again as a JPEG?


No it doen't save it again. Opening it puts the image into RAM,
closing the image flushes the image out of RAM, and has no effect on
the image on the disk<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

Jim Townsend <not.DeleteThis@real.address> wrote let it be known in
news:10ppk9jgs6tg36f@news.supernews.com:

 > It would be a nightmare if webmasters had to constantly
 > replace their 'worn out' jpegs on a regular basis because
 > they were viewed too much

I insist on regular jpeg scheduled maintenance from whichever
web server I host on.

The owners manual usually suggests a pixel change every 300
views or 3 days, whichever comes first, and a 'rotate and color
balance' every 20,000 views.

--
Christina Barnes
CB Design<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

Simply closing it without having done anything will not save it again.
However, see below, he says "save it as JPEG". This in fact is saving.
Marcel

<drs DeleteThis @canby.com> wrote in message
news:9pjpp0hjtsmiaqlad31ta1icmpmg3ej4pl@4ax.com...
 > On Thu, 18 Nov 2004 11:24:15 -0500, "Marcel" <cosmar DeleteThis @rogers.com>
 > wrote:
 >
  > >Sure, but unless I'm out to lunch, the guy says repeatedly:
  > >2. open (1) and save as a JEPG
  > >3. open (2) and save as a JEPG etc..
  > >In fact the pic has been saved 5 times if I can count... or did I miss
  > >something?
  > >Marcel
 >
 > Is that different than simply opening and closing it? Doesn't that
 > automatically save it again as a JPEG?<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

drs RemoveThis @canby.com wrote:
 > On Thu, 18 Nov 2004 11:24:15 -0500, "Marcel" <cosmar RemoveThis @rogers.com>
 > wrote:
 >
 >
  >>Sure, but unless I'm out to lunch, the guy says repeatedly:
  >>2. open (1) and save as a JEPG
  >>3. open (2) and save as a JEPG etc..
  >>In fact the pic has been saved 5 times if I can count... or did I miss
  >>something?
  >>Marcel
 >
 >
 > Is that different than simply opening and closing it? Doesn't that
 > automatically save it again as a JPEG?

Not unless your program is totally braindead!<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

Ron

Perfectly right and I agree with the sentiments wholeheartedly, but maybe we
should also stress not saving the file - an involuntary user action within
the viewing software (dependant on the software) could conceivably cause the
software to ask if you want to save the file. Answering yes (which a new
user may well do) would generate the problem.

Peter
--
Peter & Elizabeth Corser
Leighton Buzzard
Beds UK
"Ron Hunter" <rphunter.DeleteThis@charter.net> wrote in message
news:10posooplg308cd@corp.supernews.com...
 > drs.DeleteThis@canby.com wrote:
  >> Is there an easy way to lock a jpeg file so it doesn't lose data when
  >> it's viewed multiple times? I don't have PhotoShop or any similar
  >> programs. Simply changing the filename won't prevent loss, will it?
 >
 > Sigh.
 >
 > One more time
 >
 > VIEWING A JPG PHOTO DOES NOT, REPEAT; NOT, degrade quality, only repeated
 > editing and saves degrade quality. You can view the photo a million times
 > and it will display the same each time.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

Simply close the file without saving. The jpeg will remain exactly as it
was.

--
<a style='text-decoration: underline;' href="http://www.chapelhillnoir.com" target="_blank">http://www.chapelhillnoir.com</a>
home of The Camera-ist's Manifesto
The Improved Links Pages are at
<a style='text-decoration: underline;' href="http://www.chapelhillnoir.com/links/mlinks00.html" target="_blank">http://www.chapelhillnoir.com/links/mlinks00.html</a>
A sample chapter from "Haight-Ashbury" is at
<a style='text-decoration: underline;' href="http://www.chapelhillnoir.com/writ/hait/hatitl.html" target="_blank">http://www.chapelhillnoir.com/writ/hait/hatitl.html</a>

<drs.RemoveThis@canby.com> wrote in message
news:9t7op0d1qijb263186qn5n0kbbl9a4us2d@4ax.com...
 > Is there an easy way to lock a jpeg file so it doesn't lose data when
 > it's viewed multiple times? I don't have PhotoShop or any similar
 > programs. Simply changing the filename won't prevent loss, will it?<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss 

drs DeleteThis @canby.com wrote:
 > On Thu, 18 Nov 2004 11:24:15 -0500, "Marcel" <cosmar DeleteThis @rogers.com>
 > wrote:
 >
 >
  >>Sure, but unless I'm out to lunch, the guy says repeatedly:
  >>2. open (1) and save as a JEPG
  >>3. open (2) and save as a JEPG etc..
  >>In fact the pic has been saved 5 times if I can count... or did I miss
  >>something?
  >>Marcel
 >
 >
 > Is that different than simply opening and closing it? Doesn't that
 > automatically save it again as a JPEG?

Hi...

Maybe the problem is with the word "close" ?

Open it, look at it, and "stop looking at it" equals
no change. No harm done, no loss of quality.

Open it, look at it, change it somehow, and
"save" it; or "save it as" and there is harm
done, a loss of quality.

Ken<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: how to stop JPEG loss