Jpeg compression

Eveytime i edit and save images with WLPG the size of them decreases of
about 50%. For example a 7mpx picture which takes about 3mb before being
edited, takes 1.5-1.7mb after the operation.
I suppose that WLPG uses a high compression factor, even if pictures look
good the same.
To keep the greatest quality should i use a true image editor where i can
choose a custom jpeg compression or trust WLPG?
Thanks

Wow, that is not the expected behavior. Can you tell me the steps I need to
follow to reproduce the same behavior? I have an 8mpx photo. What kind of
editing to you do to the photo? Remove red eye? Adjust Color? Also, do
you have an original 7mpx photo where you see this problem that you can
share with me?

--
Troy Barnes
Microsoft

This posting is provided "AS IS" with no warranties, and confers no rights.

"Skynet" <skynet@xxxxxx> wrote in message
news:10181DBB-8C26-417B-9894-F566221275A6@xxxxxx

Troy Barnes (MSFT) wrote: ==============================
Apparently the compression algorithms
used in various brands of digital cameras
are not all the same. I downloaded a few
sample JPEGs from Steve's Digicams
and used Auto Adjust on each one in
WLPG.

I found the results to be interesting:
(all from 7MP cameras 3072 x 2304)

Canon before : 3.05 MB after : 1.52 MB
Fuji before : 3.19 MB after : 2.05 MB
Kodak before : 2.14 MB after : 1.49 MB
Olympus before : 3.32 MB after : 1.51 MB
Sony before : 2.95 MB after : 1.07 MB

If you use the Revert option to undo the edit...
the original file size is also restored.

--

John Inzer
Digital Media MVP

Notice
This is not tech support
I am a volunteer

Solutions that work for
me may not work for you

Proceed at your own risk

"Troy Barnes (MSFT)" <troyb@xxxxxx> ha scritto nel messaggio
news:B24ABE5D-1E01-49DC-9287-B4FACA7F0391@xxxxxx
You can do a simple test using this picture:

http://www.thoosje.com/vista-wallpap...lpapers(3).jpg

Open in with windows live photogallery, go to edit and choose "auto adjust".
Then exit WLPG to let it to save the picture and go to your hd where you
saved the image: you will see that it has been reduced from 1597kb to 497.
Where that megabyte has gone?
Picture look nice the same, but WLPG uses a too high jpeg compression.

you're right, we need a slider like photoshop has when saving jpgs.

"Skynet" <skynet@xxxxxx> wrote in message
news:BF15E014-9565-4612-90AB-415D2C07F34F@xxxxxx

Thanks for your input on this,
Based on what you posted you think the adjusted (smaller in file size) photo
is still nice, right? It seems like with this photo it is easier to get
good compression because the file has much of the same color throughout the
entire scene. This would mean less data is needed when compressed. If you
were to test this with a photo with more colors you would not see such a
file size reduction.

I guess it comes down to your happiness with photo appearance. If it still
looks good and it saves some space then it is good, right? If you don't
want to have that much compression you can go to the File menu and choose
"Revert to Original (CTRL + R)" and the original file will be restored. We
will consider an option to change the jpeg compression in the future.

--
Troy Barnes
Microsoft

This posting is provided "AS IS" with no warranties, and confers no rights.

"Skynet" <skynet@xxxxxx> wrote in message
news:BF15E014-9565-4612-90AB-415D2C07F34F@xxxxxx