jpg compression quality in windows 7 poorer than xp

Arc · 28 Apr 2010

16cowboy said:

Anybody found a update or a solution to this, still very annoying!
XP was better quality after resizing..

Programs like Adobe Photoshop have an option to save qulity adjustment option, Which windows or MS Paint dont have !
As a free application, you can use IrfanView . That as gives this option.

FliGi7 · 28 Apr 2010

I see what you're getting at, but it has nothing to do with the quality of the actual photo. If it did, XP would display it just as poorly.

mitchell65 · 29 Apr 2010

FliGi7 said:

I see what you're getting at, but it has nothing to do with the quality of the actual photo. If it did, XP would display it just as poorly.

Just so that I get my head round this problem as I have only just got to this thread. Are you saying that if you create a jpeg at a certain size and compression, if you view that in "a program" in Windows 7 then boot into XP in the same machine, use the same program and image file then the XP view looks better quality than the Win 7?

hybridfan · 29 Apr 2010

Hmm very unusual there might be a registry hack deep within Windows to adjust the quality... We'll have to have a look into this matter.

mitchell65 · 29 Apr 2010

hybridfan said:

Hmm very unusual there might be a registry hack deep within Windows to adjust the quality... We'll have to have a look into this matter.

Well I have done a test with half a dozen jpeg all at 12 level of compression and I can't see any difference at all in the quality when in Win 7 or XP. The images were from RAW files, post processed in PS Elements 6 all sized the same and saved to JPEG level 12.

Arc · 29 Apr 2010

mitchell65 said:

Well I have done a test with half a dozen jpeg all at 12 level of compression and I can't see any difference at all in the quality when in Win 7 or XP. The images were from RAW files, post processed in PS Elements 6 all sized the same and saved to JPEG level 12.

It should be the situation, John !
Probably he started with a file that is of poor quality.

NDDL05 · 30 Apr 2010

I've noticed that zooming in Windows 7 Photo Viewer makes images very pixelated and jagged. No problem zooming on the same pics in XP (dual boot machine). Perhaps a related issue?

PooMan UK · 30 Apr 2010

Well I've had a look and I can't see the difference (apart from "outlook" trying to resize/compress images) I've done some test's (see image) and the file size/ compression ratio is the same between xp,vista and Win7 I'm a bit

Posted both jpeg and png just to double check, but I see no difference

FliGi7 · 10 May 2010

mitchell65 said:

FliGi7 said:

I see what you're getting at, but it has nothing to do with the quality of the actual photo. If it did, XP would display it just as poorly.

Just so that I get my head round this problem as I have only just got to this thread. Are you saying that if you create a jpeg at a certain size and compression, if you view that in "a program" in Windows 7 then boot into XP in the same machine, use the same program and image file then the XP view looks better quality than the Win 7?

Correct. Using the same default windows photo viewer in both XP and Win 7, Win 7 shows a poorer and more pixelated image when zoomed as compared to xp when zoomed at the same level.

FliGi7 · 10 May 2010

Arc said:

mitchell65 said:

Well I have done a test with half a dozen jpeg all at 12 level of compression and I can't see any difference at all in the quality when in Win 7 or XP. The images were from RAW files, post processed in PS Elements 6 all sized the same and saved to JPEG level 12.

It should be the situation, John !
Probably he started with a file that is of poor quality.

Nope. If the file was poor quality, it would show poorly on both systems, which it does not - only in Win 7 do they appear blocky and pixelated upon zoom.