Program to reduce the size of a jpeg?

  • Thread starter Thread starter Daniel Prince
  • Start date Start date
D

Daniel Prince

Some of the jpegs I have downloaded from newsgroups are HUGE. They are
MUCH larger than they need to be. I have some that are a big as five
MB.

Is there a freeware program that I can tell how large I want it to make
the file and it will make it that size with the best possible quality?
For example if I have a five meg jpeg, I want to tell the program to
reduce the size to 200 KB and have it do it while keeping the visual
quality as high as possible.

Thank you in advance for all replies.
 
Daniel said:
Some of the jpegs I have downloaded from newsgroups are HUGE. They are
MUCH larger than they need to be. I have some that are a big as five
MB.

Is there a freeware program that I can tell how large I want it to make
the file and it will make it that size with the best possible quality?
For example if I have a five meg jpeg, I want to tell the program to
reduce the size to 200 KB and have it do it while keeping the visual
quality as high as possible.

Thank you in advance for all replies.
Click to expand...

JPEG is a lossy format and the more you recompress the more artifacting
is introduced. Unless the original was compressed at the highest
possible quality setting (unnaturally inflating what should have been
smaller), you're unlikely to achieve a better result without sacrificing
image quality.

Using an app like Gimp (www.gimp.org) that has extra options for exactly
how you compress the JPEG will allow you better control over the final
result. For example, you have the option of setting the subsampling to
1x1 and using an optimized baseline or not, as well as being able to
input quality parameters interactively and preview the final output and
size. You'll be amazed how dropping from 95 to 93.5 can make a dramatic
savings in size.

Alternatively, filtering out artifacts in Photoshop or automated tools
and then recompressing can sometimes be of use. Generally the JPEG DCT
works best with areas of gradients and low contrast, so smoothing out
sharp areas and edges can help compressibility.

As a side note, depending on the content, it may not be desirable to
recompress any. Such as a very high resolution NASA full field image
(with lots of small details in a large resolution image), or with a JPEG
out of a 8 megapixel camera. In that case it would be better to keep
the source as untoched as possible until you're ready to post-process
the image in Photoshop or Gimp and the like with resizing, color, crop, etc.
 
Some of the jpegs I have downloaded from newsgroups are HUGE. They are
MUCH larger than they need to be. I have some that are a big as five
MB.

Is there a freeware program that I can tell how large I want it to make
the file and it will make it that size with the best possible quality?
For example if I have a five meg jpeg, I want to tell the program to
reduce the size to 200 KB and have it do it while keeping the visual
quality as high as possible.

Thank you in advance for all replies.
Click to expand...

Open them in a photo editor such as PhotoFiltre and change the size to fit
the screen. A 1024x768 pic at 80% JPEG should be under 200KB and still look
great.

Bob

Remove "kins" to reply by e-mail.
 
Some of the jpegs I have downloaded from newsgroups are HUGE. They are
MUCH larger than they need to be. I have some that are a big as five
MB.

Is there a freeware program that I can tell how large I want it to make
the file and it will make it that size with the best possible quality?
For example if I have a five meg jpeg, I want to tell the program to
reduce the size to 200 KB and have it do it while keeping the visual
quality as high as possible.

Thank you in advance for all replies.
Click to expand...

I have posted CyberView Image Lite to alt.binaries.freeware. IMO one of
the best freeware image compression utils.

regards

Dud
 
I have posted CyberView Image Lite to alt.binaries.freeware. IMO one of
the best freeware image compression utils.

regards

Dud
Click to expand...

Here's the blurb included in the zip

CyberView Image Lite is interactive JPEG image compressor.

This software is fully functional (no time locks or crippling),
and is licensed to the end user free of charge
as stated in accompanied License.txt file and in the online help.

Major features of CyberView Image Lite.
1. Efficient compression engine.
2. Creates standard and progressive JPEG files.
3. Interactive, user interface.
4. Side by side Source and JPEG preview.
5. Zoom and other image navigation tools.
6. Integrated source browser for easy access to source images.
7. Context sensitive online help.

regards

Dud
 
Some of the jpegs I have downloaded from newsgroups are HUGE. They are
MUCH larger than they need to be. I have some that are a big as five
MB.

Is there a freeware program that I can tell how large I want it to make
the file and it will make it that size with the best possible quality?
For example if I have a five meg jpeg, I want to tell the program to
reduce the size to 200 KB and have it do it while keeping the visual
quality as high as possible.

Thank you in advance for all replies.
Click to expand...

Hi... the other day I found that I've for several years have got a
program that can do just that...(among many other things)

PaintShop Pro ver 5.0 (I know that nowadays it's ver. 8)

I have a few thousand pictures of rallycars in action from dig.camera.
The pic's are always about 800-900 KB big (1600x1200x24b colors).

I just load'ed the pictures in PSP and (without doing anything) save'd
it. Now the picture is under 100KB. And the data of the picture is the
same: 1600x1200 x 24Bits colors.

If I look _very_ zoomed, I can see a _little_ difference, but after the
save, I have to crop them anyway, so it does'nt matter for me ..

PSP have a jpeg-compressor of a sort, and that's the way ahead (for me
anyway)...

PSP cannot do it with multiple files though... I have to open every
picture, and that is very time consuming...

I'm looking for a program, that can do it as a "batch"... anyone?
 
Daniel said:
Some of the jpegs I have downloaded from newsgroups are HUGE. They are
MUCH larger than they need to be. I have some that are a big as five
MB.

Is there a freeware program that I can tell how large I want it to make
the file and it will make it that size with the best possible quality?
For example if I have a five meg jpeg, I want to tell the program to
reduce the size to 200 KB and have it do it while keeping the visual
quality as high as possible.

Thank you in advance for all replies.
Click to expand...

Daniel, from your post it's not clear to me whether you want to simply
reduce the image's file size via making the image smaller (eg. from
1024 X 768 to 800 X 600) or via increasing the compression. Can you
please clarify this? Visual quality can refer to the level of
compression artifacts *or* it can refer to the actual image size in
pixels *or* both.
 
Daniel said:
Some of the jpegs I have downloaded from newsgroups are HUGE. They
are MUCH larger than they need to be. I have some that are a big as
five MB.

Is there a freeware program that I can tell how large I want it to
make the file and it will make it that size with the best possible
quality? For example if I have a five meg jpeg, I want to tell the
program to reduce the size to 200 KB and have it do it while keeping
the visual quality as high as possible.

Thank you in advance for all replies.
Click to expand...

photofiltre whensaving click on "review" to get file size... alter
compression accordingly --

if I haven't given a url with my answer, try typing the keywords into
google.com
 
Some of the jpegs I have downloaded from newsgroups are HUGE. They are
MUCH larger than they need to be. I have some that are a big as five
MB.

Is there a freeware program that I can tell how large I want it to make
the file and it will make it that size with the best possible quality?
For example if I have a five meg jpeg, I want to tell the program to
reduce the size to 200 KB and have it do it while keeping the visual
quality as high as possible.

Thank you in advance for all replies.
Click to expand...

IrfanView is an excellent free prog for doing that plus other things
http://www.irfanview.com/
 
Duddits said:
I have posted CyberView Image Lite to alt.binaries.freeware. IMO one of
the best freeware image compression utils.

regards

Dud
Click to expand...

Dud,

could you repost, didn't make my server. What is the actual name of the zip
file?

Thanks

Zo
 
venerdì 11/giu/2004 _Zo_ ha scritto:
Dud,

could you repost, didn't make my server. What is the actual name of the zip
file?

Thanks
Click to expand...

Hi Zo,
the file's name is cvi203lt.zip

Duddits posted it with this Message-ID:
<[email protected]>
with this Subject:
CyberView Image Lite - cvi203lt.zip (*/2)

Ciao,
 
MLC said:
venerdì 11/giu/2004 _Zo_ ha scritto:


Hi Zo,
the file's name is cvi203lt.zip

Duddits posted it with this Message-ID:
<[email protected]>
with this Subject:
CyberView Image Lite - cvi203lt.zip (*/2)

Ciao,
Click to expand...

Thanks for the response Maria, unfortunately no live links found and all traces of
the post by Dud have disappeared from my server, including the one posted on
"Moveit" that I saw this morning. Hopefully a repost is forthcoming????. Thanks
again for the info.

Zo
 
ReJPEG is a free utility that visually shows how different levels of
recompression will affect an image.

It can load JPEGs or BMPs, redisplay the image at any compression
level, then save the image as a JPEG once an optimal compression level
is found. It can also graph the filesize and image quality at each
compression level, as well as view the differences between the
original image and the current recompressed image.

http://www.rejpeg.com/
 
venerdì 11/giu/2004 _Zo_ ha scritto:
Thanks for the response Maria,
YW

unfortunately no live links found and all traces of the post by Dud have
disappeared from my server, including the one posted on "Moveit" that I
saw this morning.
Click to expand...

This is odd: I don't see any post about Moveit in alt.binaries.freeware :-/
Hopefully a repost is forthcoming????.
Click to expand...

I've tried to post it right now, but my attempt failed miserably, maybe
because I'm on dialup. I'm sure however that Duddits will repost it when
he'll read your post.
 
John Corliss said:
Daniel, from your post it's not clear to me whether you want to simply
reduce the image's file size via making the image smaller (eg. from
1024 X 768 to 800 X 600) or via increasing the compression.
Either.

Can you
please clarify this? Visual quality can refer to the level of
compression artifacts *or* it can refer to the actual image size in
pixels *or* both.
Click to expand...

I want the image to as look good as possible when viewed full screen on
my 17 inch ViewSonic monitor.
 
Hi... the other day I found that I've for several years have got a
program that can do just that...(among many other things)

PaintShop Pro ver 5.0 (I know that nowadays it's ver. 8)

I have a few thousand pictures of rallycars in action from dig.camera.
The pic's are always about 800-900 KB big (1600x1200x24b colors).

I just load'ed the pictures in PSP and (without doing anything) save'd
it. Now the picture is under 100KB. And the data of the picture is the
same: 1600x1200 x 24Bits colors.

If I look _very_ zoomed, I can see a _little_ difference, but after the
save, I have to crop them anyway, so it does'nt matter for me ..

PSP have a jpeg-compressor of a sort, and that's the way ahead (for me
anyway)...

PSP cannot do it with multiple files though... I have to open every
picture, and that is very time consuming...

I'm looking for a program, that can do it as a "batch"... anyone?
Click to expand...

If you using Win XP, you can download the MS Powertoy's Picture Resizer
:- http://www.microsoft.com/windowsxp/pro/downloads/powertoys.asp

Open Windows Explorer and highlights picture(s). Right click and from
the pop up menu, choose "Resize Pictures".
 
Rob said:
ReJPEG is a free utility that visually shows how different levels of
recompression will affect an image.

It can load JPEGs or BMPs, redisplay the image at any compression
level, then save the image as a JPEG once an optimal compression level
is found. It can also graph the filesize and image quality at each
compression level, as well as view the differences between the
original image and the current recompressed image.

http://www.rejpeg.com/
Click to expand...

Thankyou for this one Rob. I was unable to find Cyberview on abf so
chose to try this. Does a wonderful job, simply and a no install to boot :)

miskairal
 
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