Hi,


I have a 408kB jpg file (from nikon coolpix) and want to optimize it
to send it my friend.

Open photofiltre,

->mode indexed colors-> system colors -> 216 web optimized colors

saving the image in png with automatic filtering i get a 660kB file.

i tried Gif, png, or clicking again on rvb colors and else, i can't
remember -if there is- the way for getting a smaller image. Or
reducing to 8-16 colors. But the "216 web colors" should be smaller
than a jpg ? imho it should.

the 20 windows color option give a 470 kB size image...

What i'm doing wrong ? i had also not much success with Irfanview. Or
with 8-16 colors but that looks ugly.

Tia,

L

Try save as> jpg and adjust compression



<lisztnet@aliceadsl.fr> wrote in message
news:1176154771.708644.25960@d57g2000hsg.googlegro ups.com...

On 9 avr, 23:52, "John Stubbings" <anna.riceDELETE-T...@virgin.net>
wrote:
Ok. i think i did it too, until 30%. the quality is sad.

Now i just tried this only tool, *amazing*

http://www.jpegwizard.com/

1) it works : my jpg was compressed to 67kB

2) the image quality is *good* ! how did they achieve that ? in jpg,
not in the recommanded Gif or Png.

number of colors, according to photofiltre : 67857

but i would prefer doing that off line....

L

<lisztnet@aliceadsl.fr> wrote in message news:1176154771.708644.25960@d57g2000hsg.googlegro ups.com...
Hi,


I have a 408kB jpg file (from nikon coolpix) and want to optimize it
to send it my friend.

Open photofiltre,

<Clip>
Use <Image><Image Size>
You can change the picture size (800x600 or 640x480 are good for Emailing), and also the resolution DPI (Dots Per Inch) - 150 or 200 DPI are adequate to maintain good visual resolution. When you save (JPG), Photofiltre allows you to set the compression quality - I always use 95% which gives around 5:1 compression without any appreciable loss in visual quality, but you can drop that to 90% if size is important.
I hope this helps.

Regards,
Amos

On 10 avr, 08:39, Duddits <Dudd...@Dreamcatcher.com> wrote:
Thanks, at a first glance i cant find this ng

L

lisztnet@aliceadsl.fr wrote in news:1176154771.708644.25960
@d57g2000hsg.googlegroups.com:

Open the jpg in irfanview, choose 'save as'. Make sure the 'Keep original
EXIF data and the two options bleow are unchecked, removing EXIF will
reduce the file-size.
If you don't mind the picture being smaller you could resize it using
Ctrl+R, this will also reduce filesize.
Once you have removed the EXIF and resized your jpg to the dimensions you
want, you can try to use the 'save quality' slider. Try it at 75%, which
will make not much difference in viewing it on your screen, but it will
also reduce the file size.

HTH

--
Dirk

On 10 avr, 13:39, Dirk <n...@mail.please> wrote:

Thanks for all help ;

I wanted mostly to do it for testing purpose : Open a file as jpg,
with good quality, and then bring it to a light weight image, using
png or gif which are opimized for the web.

Just decrease color depht, from many thousends in jpg to e few
"indedxed" colors, in IrfanView, or Photophiltre; But it's not so
easy ! usually my file is twice bigger :


Input file = 400kB, output = 800 / 1,2 MB.

And that happens while i decreased dramaticaly colors, and used
performant compressions algorythm.

EXIF : i thing for the moment that it is only a small text; It's not
the main issue imho...


L

lisztnet@aliceadsl.fr wrote in
news:1176208262.283168.282020@q75g2000hsh.googlegr oups.com:

Could you mail me this test-photo ? I'll try to reduce it and mail you
the steps I took. E-mail is in my sig.

You should be able to reduce the size without changing the colors-
settings.

--
Dirk
rdfijnATgmailDOTcom

lisztnet@aliceadsl.fr wrote:

http://www.scantips.com/basics09.html

"Web pages require JPG or GIF or PNG image types, because that is all
that browsers can show. On the web, JPG is the best choice (smallest
file) for photo images, and GIF is most common for graphic images."

JPEG FAQ
http://www.faqs.org/faqs/jpeg-faq/
http://www.faqs.org/faqs/jpeg-faq/part1/
http://www.faqs.org/faqs/jpeg-faq/part2/

<q>
Basic questions:

[1] What is JPEG?
[2] Why use JPEG?
[3] When should I use JPEG, and when should I stick with GIF?
[4] How well does JPEG compress images?
[5] What are good "quality" settings for JPEG?
[6] Where can I get JPEG software?
[7] How do I view JPEG images posted on Usenet?
</q>

and lots more. . .

Susan
--
Posted to alt.comp.freeware
Search alt.comp.freeware (or read it online):
http://www.google.com/advanced_group....comp.freeware
Pricelessware & ACF: http://www.pricelesswarehome.org
Pricelessware: http://www.pricelessware.org (not maintained)

On Mon, 09 Apr 2007 15:17:39 -0700, lisztnet wrote:

Uhm... recommended by _who_? Or for what?

GIF is more or less superseeded by PNG nowadays, except for animations.
PNG is good for web graphics with clean colors, if you need
fixed or gradient transparency with alpha channels, or even if you need
high quality full color photos with lossless compression. But for photos
with high quality/filesize ratios, JPG is still the way to go, also for
web. And converting a JPG to a PNG is pretty much putting a bullet in your
own foot.

Instead of converting to a different format you should probably change the
properties of your JPG. There's basically three ways to shave some bytes
off your JPGs:

- Compression ratios. Typically stated as a percentage from 1-100.
JPG is a lossy format, and increasing compression means reducing quality.
The human eye will normally not notice much difference at 90% quality, but
I doubt you'll want to go below 50. You have already noticed that the
results at 30% is far from satisfactory.

- Resolution. Remove some pixels from your picture. Most digicams offers
multimegapixel resolutions, but these are not needed for onscreen display.
A typical 19" display has a resolution of 1280x1024, and a lot of laptops
have widescreen resolutions around 1280x800, so reducing your picture to a
1280 pixel width should mean that most of your intended audience can view
it with minimal loss of quality.

- EXIF data. Not a major factor, but stripping away EXIF data (metatags
containing stuff like picture date, camera model etc) can shave some
valuable bytes off your files. Especially useful if you have multiple
images (thumbnails, for instance) on a single web page.

There's plenty of tools that you can use offline to do the necessary
conversion of your pictures. Most of them even have a batch-mode where you
can convert multiple pictures in one go. This includes the most popular
freeware image viewers such as XNView, FastStone Image Viewer and
IrfanView (google for URLs).

I once used FastStone to convert 700+ pictures for a web gallery, and I
ended up with 1024x768 pictures of less than 100 kB each and 150x150
thumbnails with file sizes around 3-4 kB. The on screen quality was good
enough to eat, and my parents even printed out one of the images on A4
paper with decent results. The original files were 5-7 megapixel pictures
with file sizes in excess of 2 MB.

On 10 avr, 16:03, Susan Bugher <sebug...@yahoo.com> wrote:

=======================

Ok, because there are things i can't give up, i try now something
new : reducing depht color in MS-SNAP :


http://www.mirekw.com/


After saving in various format, i took a 16bit bmp saved with ms-snap,
1,5MB size and convert it to a reasonable small Gif with Irfanview :
135kB.

I still not undestand. The bmp above has as much colors as usual,
16Bit=65536 of colors; But eh, windows has 32bit colors, irfanview
24B...

Irfanview uncompress every thing. Therefor i gave it a uncompressed
file it could not inflate anymore.... and then compress it .


BTW, ms-snap crashes when it comes to save 16Bit file in Tiff
format...


Well i need to do it easier...but the way is shown


L

lisztnet@aliceadsl.fr wrote in
news:1176218128.305551.218400@b75g2000hsg.googlegr oups.com:

Give up
Just use .jpg and resize it. The example you mailed me is 1200px by 1600px.
For use on the web just resize it to a smaller size, it will reduce the
disk size dramatically. And the picture quality is hardly less when saved
to a lesser quality, like 80 or even lower, which will also reduce the
size. The best way to go, especially with pictures like you send me is just
use .jpg for use on the web, it gives good enough quality at little kb's.
And I don't think you can get much lower on disk size (~400kb) if you want
that size and picture quality with the picture you send me. Looking at the
photo I would have thought it was at least 1 Mb.

--
Dirk

lisztnet@aliceadsl.fr wrote:

http://www.scantips.com/palettes.html

"File formats like TIF and JPG store a 24 bit RGB value for each of the
millions of image pixels."

More info on the web page. . .

Susan
--
Posted to alt.comp.freeware
Search alt.comp.freeware (or read it online):
http://www.google.com/advanced_group....comp.freeware
Pricelessware & ACF: http://www.pricelesswarehome.org
Pricelessware: http://www.pricelessware.org (not maintained)

On 10 avr, 17:28, Dirk <n...@mail.please> wrote:

Well, that sound wise !

thanks to Susan too,

L