Go Back   Steve's Digicams Forums > Digital Cameras (Point and Shoot) > Panasonic / Leica

Reply
 
Thread Tools Search this Thread
Old Feb 21, 2005, 3:56 PM   #1
Junior Member
 
Join Date: Jan 2005
Posts: 19
Default

The first of the 4 photos is untouched except for cropping and resizing.

The 3 others - more or less under-exposed -have their lower half histogram adjusted in PSP and their right part noise reduced with standard settings also in PSP. They are saved as .gif in order to avoid extra jpeg artifacts which show up in this kind of picture. Exposure conditions are marked in the photos.

JL


Attached Images
 
jlippert is offline   Reply With Quote
Sponsored Links
Old Feb 21, 2005, 10:15 PM   #2
Senior Member
 
NickTrop's Avatar
 
Join Date: Sep 2004
Posts: 2,249
Default

Nice test. Thank you for posting. I am suprised at how nice the third turned out.
NickTrop is offline   Reply With Quote
Old Feb 21, 2005, 10:24 PM   #3
Junior Member
 
Join Date: Oct 2004
Posts: 27
Default

That's an interesting set of comparisons. I wondered what setting was used for in-camera noise reduction? I noticed that the 3rd shot (F2.8, 1/200, 400) was taken at effectively nearly 2 stops underexposed compared with the first shot (2.8, 1/15, 100). I think other people have said that underexposure at 400 ISO tends to worsen the noise. Maybe if the exposure value had matched the first shot, the 3rd shot would have "cleaned up" even more? Anyway, it shows that a usable image can be achieved at 400 after doing PP even at quite severe underexposure.
Ian
ianperegian is offline   Reply With Quote
Old Feb 22, 2005, 7:11 AM   #4
Junior Member
 
Join Date: Jan 2005
Posts: 19
Default

Hi

All other camera settings were 'normal'

JL
jlippert is offline   Reply With Quote
Old Feb 22, 2005, 11:51 AM   #5
Junior Member
 
Join Date: Feb 2005
Posts: 21
Default

Is this a suggestion that it´s the computer and it´s way of boosting the image in the camera that´s guilty of all the noise on iso400 pictures?

Is there a suggestion that a firmware update could help in the future?
gmosc is offline   Reply With Quote
Old Feb 22, 2005, 2:54 PM   #6
Junior Member
 
Join Date: Jan 2005
Posts: 19
Default

No - I think the only ways to improve the signal to noise ratio in the sensor are either larger sensors or better materials and production procedures.

JL
jlippert is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 2:49 AM.