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External
Since: Jul 19, 2007
Posts: 3
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(Msg. 1) Posted: Thu Jul 19, 2007 2:00 am
Post subject: What program is best at JPEG compression?
Archived from groups: rec>photo>digital, others (more info?)
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Are some graphics programs better than others for compressing JPEG?
A friend swears that Image Ready is the best for getting the
smallest file with same quality.
But I see a few companies have made utilities purely for
compressing pictures, and claim they obtain better
compression than the top tier graphics programs.
I presume there are different numerical routines used by
different companies in their software, but I would guess
maybe 5% variation in file size at best.
I know there was a comparison done several years ago,
but the website with the pictures seems to be kaput.
(www.imagecompress.com ?)
Is there a recent comparison of different programs to see
who offers the best compression?
That is, best quality for same size, or smallest size
for same quality. |
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External
Since: Jul 19, 2007
Posts: 1
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(Msg. 2) Posted: Thu Jul 19, 2007 5:56 am
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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u235bomb RemoveThis @ml1.net wrote:
> Are some graphics programs better than others for compressing JPEG?
> A friend swears that Image Ready is the best for getting the
> smallest file with same quality.
> But I see a few companies have made utilities purely for
> compressing pictures, and claim they obtain better
> compression than the top tier graphics programs.
> I presume there are different numerical routines used by
> different companies in their software, but I would guess
> maybe 5% variation in file size at best.
> I know there was a comparison done several years ago,
> but the website with the pictures seems to be kaput.
> (www.imagecompress.com ?)
> Is there a recent comparison of different programs to see
> who offers the best compression?
> That is, best quality for same size, or smallest size
> for same quality.
>
I have a program called Advanced JPEG Compressor, it gives you far more
control in how the compression is does and allow you to use different
amounts of compression in different areas of the image. It can do a
better job, but takes a fair bit of use to use and the gains are fairly
small. I only use it when posting to the web and where I am really
trying to limit the file size of the photo.
Scott |
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External
Since: Aug 25, 2006
Posts: 48
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(Msg. 3) Posted: Thu Jul 19, 2007 9:57 am
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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<u235bomb.RemoveThis@ml1.net> wrote in message
news:1184835628.283392.315080@i38g2000prf.googlegroups.com...
> Are some graphics programs better than others for compressing JPEG?
> A friend swears that Image Ready is the best for getting the
> smallest file with same quality.
> But I see a few companies have made utilities purely for
> compressing pictures, and claim they obtain better
> compression than the top tier graphics programs.
> I presume there are different numerical routines used by
> different companies in their software, but I would guess
> maybe 5% variation in file size at best.
> I know there was a comparison done several years ago,
> but the website with the pictures seems to be kaput.
> (www.imagecompress.com ?)
> Is there a recent comparison of different programs to see
> who offers the best compression?
> That is, best quality for same size, or smallest size
> for same quality.
>
Jpeg compression is a big subject, since JPEG is a lossy compression scheme,
there are always trade offs. File size vs. amount of compression and
artifacts.
The better Graphic programs give you a choice of the amount of compression
used.
The de facto best Photo editor it Adobe Photoshop. The full version is about
$650 or $150 for the upgrade.
Photoshop Elements is a consumer grade Photo editor that costs much less
money ($100) and does most of what Photoshop CS does.
http://www.adobe.com/products/photoshopelwin/
--
CSM1
http://www.carlmcmillan.com
-- >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Jul 19, 2007
Posts: 13
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(Msg. 4) Posted: Thu Jul 19, 2007 10:01 am
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: rec>photo>digital, others (more info?)
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In rec.photo.digital u235bomb.DeleteThis@ml1.net wrote:
> Are some graphics programs better than others for compressing JPEG?
GIMP is probably the best because it gives you all the control you need
with a relatively simple user interface.
> A friend swears that Image Ready is the best for getting the
> smallest file with same quality.
I doubt anything from Adobe would be good at JPEG.
Supporting NIH public standards is not their forte.
Photoshop is particularly poor at JPEG rewriting,
because it lacks flexibility.
> But I see a few companies have made utilities purely for
> compressing pictures, and claim they obtain better
> compression than the top tier graphics programs.
Using 4:2:2 chroma subsampling saves a lot of space
without reducing quality.
> I presume there are different numerical routines used by
> different companies in their software, but I would guess
> maybe 5% variation in file size at best.
Much of the variation comes from preview, header comments, EXIF, etc.
> I know there was a comparison done several years ago,
> but the website with the pictures seems to be kaput.
> (www.imagecompress.com ?)
There is a good article about JPEG on the photo.net site:
http://photo.net/learn/jpeg/
> Is there a recent comparison of different programs to see
> who offers the best compression? That is, best quality
> for same size, or smallest size for same quality.
Nowadays the discussion is about old JPEG versus JPEG 2000. >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Jul 19, 2007
Posts: 1
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(Msg. 5) Posted: Thu Jul 19, 2007 12:01 pm
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Imported from groups: rec>photo>digital, others (more info?)
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External
Since: Jun 20, 2007
Posts: 5
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(Msg. 6) Posted: Thu Jul 19, 2007 6:26 pm
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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u235bomb.RemoveThis@ml1.net wrote:
> Are some graphics programs better than others for compressing JPEG?
> A friend swears that Image Ready is the best for getting the
> smallest file with same quality.
> But I see a few companies have made utilities purely for
> compressing pictures, and claim they obtain better
> compression than the top tier graphics programs.
> I presume there are different numerical routines used by
> different companies in their software, but I would guess
> maybe 5% variation in file size at best.
> I know there was a comparison done several years ago,
> but the website with the pictures seems to be kaput.
> (www.imagecompress.com ?)
> Is there a recent comparison of different programs to see
> who offers the best compression?
> That is, best quality for same size, or smallest size
> for same quality.
I use one in particular called Adobe PhotoDeluxe that gives options of jpeg
compression such as Baseline(standard), Baseline Optimized and Progressive
and then gives an option to save paths. I guess Jpeg is not a simple file
format.
I also like IrfanView and Xnview among others.
Jon. >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Jul 19, 2007
Posts: 13
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(Msg. 7) Posted: Thu Jul 19, 2007 6:26 pm
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: rec>photo>digital, others (more info?)
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In rec.photo.digital Jonathan <Jonathan.DeleteThis@house.not> wrote:
>
> I also like IrfanView and Xnview among others.
I like Irfanview too -- it is a great image and slideshow viewer --
but it does not control chroma subsampling.
Xnview is available for Linux, apparently. Do you prefer it to xv? >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Jul 20, 2007
Posts: 2
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(Msg. 8) Posted: Fri Jul 20, 2007 6:55 am
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: rec>photo>digital, others (more info?)
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<u235bomb DeleteThis @ml1.net> wrote in message
news:1184835628.283392.315080@i38g2000prf.googlegroups.com...
> Are some graphics programs better than others for compressing JPEG?
> A friend swears that Image Ready is the best for getting the
> smallest file with same quality.
> But I see a few companies have made utilities purely for
> compressing pictures, and claim they obtain better
> compression than the top tier graphics programs.
> I presume there are different numerical routines used by
> different companies in their software, but I would guess
> maybe 5% variation in file size at best.
> I know there was a comparison done several years ago,
> but the website with the pictures seems to be kaput.
> (www.imagecompress.com ?)
> Is there a recent comparison of different programs to see
> who offers the best compression?
> That is, best quality for same size, or smallest size
> for same quality.
>
I don't know if it's the best, probably not, but the Optimizer in the 'Save
As' options in Paint Shop Pro 9 is really handy for compressing pictures
down to a small size. It allows you a real-time view of a zoomed crop
while the compression factor is changed so that artefacts can be seen. That
way, the max compression for a particular picture is easy to find and it
also predicts the file size, handy for web posting. >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Jul 20, 2007
Posts: 2
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(Msg. 9) Posted: Fri Jul 20, 2007 7:04 am
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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"GilfordBrimly" <antispam.RemoveThis@myisp.com> wrote in message
news:9p4v93hv10tab9virqk9at0q1nkb5t3oqj@4ax.com...
> In testing a 6 megapixel 2816x2112 image just now with a lot of detail in
> it
> (foliage and animal fur), the original 3meg file compresses down 416k at
> RealOptimizer's 50% setting with virtually no image degradation nor
> downsizing
> needed.
Thee only problem with this is that jpg artefacts are usually first noticed
as blocking in large areas of slightly varying tone like the sky. Were
there any areas like that in your test photo? >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Jan 27, 2004
Posts: 35
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(Msg. 10) Posted: Fri Jul 20, 2007 7:09 pm
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article <469f89b0$0$20534$4c368faf@roadrunner.com>,
Scott W <biphoto.RemoveThis@hotmail.com> wrote:
>u235bomb@ml1.net wrote:
>> Are some graphics programs better than others for compressing JPEG?
>> A friend swears that Image Ready is the best for getting the
>> smallest file with same quality.
>> But I see a few companies have made utilities purely for
>> compressing pictures, and claim they obtain better
>> compression than the top tier graphics programs.
>> I presume there are different numerical routines used by
>> different companies in their software, but I would guess
>> maybe 5% variation in file size at best.
>> I know there was a comparison done several years ago,
>> but the website with the pictures seems to be kaput.
>> (www.imagecompress.com ?)
>> Is there a recent comparison of different programs to see
>> who offers the best compression?
>> That is, best quality for same size, or smallest size
>> for same quality.
>>
>I have a program called Advanced JPEG Compressor, it gives you far more
>control in how the compression is does and allow you to use different
>amounts of compression in different areas of the image. It can do a
>better job, but takes a fair bit of use to use and the gains are fairly
>small. I only use it when posting to the web and where I am really
>trying to limit the file size of the photo.
The xat.com Image Optimizer, and JPEG Wizard (Pegasus Systems) are two
similar products that work somewhat differently, and have differing
additional feature sets - but also allow direct visual manipulation of the
trade-off between file size and image quality on a per-area basis within
the image. As you say, mainly for web posting of where size is of absolute
importance (like when we email photos to relatives using dial-up
connections). >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Dec 18, 2003
Posts: 15
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(Msg. 11) Posted: Mon Jul 23, 2007 9:25 am
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Thu, 19 Jul 2007 09:57:39 -0500, "CSM1" <nomail.TakeThisOut@nomoremail.com>
wrote:
><u235bomb.TakeThisOut@ml1.net> wrote in message
>news:1184835628.283392.315080@i38g2000prf.googlegroups.com...
>> Are some graphics programs better than others for compressing JPEG?
>> A friend swears that Image Ready is the best for getting the
>> smallest file with same quality.
>> But I see a few companies have made utilities purely for
>> compressing pictures, and claim they obtain better
>> compression than the top tier graphics programs.
>> I presume there are different numerical routines used by
>> different companies in their software, but I would guess
>> maybe 5% variation in file size at best.
>> I know there was a comparison done several years ago,
>> but the website with the pictures seems to be kaput.
>> (www.imagecompress.com ?)
>> Is there a recent comparison of different programs to see
>> who offers the best compression?
>> That is, best quality for same size, or smallest size
>> for same quality.
>>
>
>Jpeg compression is a big subject, since JPEG is a lossy compression scheme,
>there are always trade offs. File size vs. amount of compression and
>artifacts.
>
>The better Graphic programs give you a choice of the amount of compression
>used.
>The de facto best Photo editor it Adobe Photoshop. The full version is about
>$650 or $150 for the upgrade.
>
>Photoshop Elements is a consumer grade Photo editor that costs much less
>money ($100) and does most of what Photoshop CS does.
>http://www.adobe.com/products/photoshopelwin/
>
I've always thought jpeg and its compression algorithm were subject to
a general standard and not to any program makers' fantasy ..???? >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Jul 19, 2007
Posts: 13
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(Msg. 12) Posted: Mon Jul 23, 2007 10:59 am
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: rec>photo>digital, others (more info?)
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In rec.photo.digital Fed-Up-With-Corel <nobody.RemoveThis@noplace.org> wrote:
>
> Unless you use an editor that is able to edit JPEG files
> without recompressing the whole image every time you save it.
> PhotoLine 32 www.pl32.com is the only one I know of that
> allows you to edit a JPG file where the only data that gets
> put through the compression routine again when you save it
> is that which you specifically edit or change from the original.
JPEG Wizard also did/does this to a certain extent.
Is PhotoLine32 almost equivalent to Photoshop in functionality?
It has 32-bit and LAB/CMYK support, but only costs 59 Euros.
The online tutorial does not seem complete. >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Aug 25, 2006
Posts: 48
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(Msg. 13) Posted: Mon Jul 23, 2007 2:40 pm
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: rec>photo>digital, others (more info?)
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"imbsysop" <imbsysop.TakeThisOut@yahoo.com> wrote in message
news:dul8a35t354eddpumghhjsddjkmrpqp1l0@4ax.com...
> On Thu, 19 Jul 2007 09:57:39 -0500, "CSM1" <nomail.TakeThisOut@nomoremail.com>
> wrote:
>
>><u235bomb.TakeThisOut@ml1.net> wrote in message
>>news:1184835628.283392.315080@i38g2000prf.googlegroups.com...
>>> Are some graphics programs better than others for compressing JPEG?
>>> A friend swears that Image Ready is the best for getting the
>>> smallest file with same quality.
>>> But I see a few companies have made utilities purely for
>>> compressing pictures, and claim they obtain better
>>> compression than the top tier graphics programs.
>>> I presume there are different numerical routines used by
>>> different companies in their software, but I would guess
>>> maybe 5% variation in file size at best.
>>> I know there was a comparison done several years ago,
>>> but the website with the pictures seems to be kaput.
>>> (www.imagecompress.com ?)
>>> Is there a recent comparison of different programs to see
>>> who offers the best compression?
>>> That is, best quality for same size, or smallest size
>>> for same quality.
>>>
>>
>>Jpeg compression is a big subject, since JPEG is a lossy compression
>>scheme,
>>there are always trade offs. File size vs. amount of compression and
>>artifacts.
>>
>>The better Graphic programs give you a choice of the amount of compression
>>used.
>>The de facto best Photo editor it Adobe Photoshop. The full version is
>>about
>>$650 or $150 for the upgrade.
>>
>>Photoshop Elements is a consumer grade Photo editor that costs much less
>>money ($100) and does most of what Photoshop CS does.
>>http://www.adobe.com/products/photoshopelwin/
>>
>
> I've always thought jpeg and its compression algorithm were subject to
> a general standard and not to any program makers' fantasy ..????
>
Have you read the JPEG specification?
http://www.w3.org/Graphics/JPEG/jfif3.pdf
If you are talking about Digital cameras, you use the EXIF 2.2 spec.
http://www.exif.org/Exif2-2.PDF
There is a lot of room for interpolation of the application of JPEG
compression.
Many factors that have to be balanced for the best result.
Since Jpeg is lossy, it throws away a lot of important information that is
gone forever, if you choose wrong.
--
CSM1
http://www.carlmcmillan.com
-- >> Stay informed about: What program is best at JPEG compression? |
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External
Since: Jul 24, 2007
Posts: 4
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(Msg. 14) Posted: Mon Jul 23, 2007 2:40 pm
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Imported from groups: per prev. post (more info?)
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External
Since: Jul 23, 2007
Posts: 1
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(Msg. 15) Posted: Mon Jul 23, 2007 4:36 pm
Post subject: Re: What program is best at JPEG compression? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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u235bomb RemoveThis @ml1.net wrote:
> Are some graphics programs better than others for compressing JPEG?
> A friend swears that Image Ready is the best for getting the
> smallest file with same quality.
> But I see a few companies have made utilities purely for
> compressing pictures, and claim they obtain better
> compression than the top tier graphics programs.
> I presume there are different numerical routines used by
> different companies in their software, but I would guess
> maybe 5% variation in file size at best.
No; quantisation, and it effects on data size are well
defined, but the visual effects of various quantisations
(the lossy part) are not completely understood.
This is where companies apply their "magic"
http://www.jpegwizard.com/
http://vision.arc.nasa.gov/dctune/
This page looks helpful:
http://www.webreference.com/dev/graphics/
BugBear >> Stay informed about: What program is best at JPEG compression? |
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