blurred pics when up-loaded

Suggestions and comments about SummitPost's features, policies, and procedures. Post bugs here.
User Avatar
sharperblue

 
Posts: 447
Joined: Wed Dec 06, 2006 4:05 am
Thanked: 80 times in 58 posts

blurred pics when up-loaded

by sharperblue » Mon Aug 06, 2012 7:57 pm

Began putting up a few new pics yesterday, and noticed that the quality is pretty bad in many of them post-up-load (but not all of them); is there something I can do on my end in 'Shop or with the resolution to make the quality better match the originals - ? The file size pre- and post- is the same, but clearly something is being lost in translation

Thanks!

User Avatar
norco17

 
Posts: 847
Joined: Tue Dec 02, 2008 12:53 am
Thanked: 200 times in 135 posts

Re: blurred pics when up-loaded

by norco17 » Tue Aug 07, 2012 6:04 am

what file format are you using? jpg? can you post a link so we can look at it?

User Avatar
sharperblue

 
Posts: 447
Joined: Wed Dec 06, 2006 4:05 am
Thanked: 80 times in 58 posts

Re: blurred pics when up-loaded

by sharperblue » Tue Aug 07, 2012 6:56 am

this shot is probably the worst offender; looks crisp on my screen in PS before uploading (yes, all jpg) :

http://images.summitpost.org/original/804369.JPG

Thanks!

User Avatar
Buz Groshong

 
Posts: 2845
Joined: Tue Sep 14, 2004 10:58 pm
Thanked: 687 times in 484 posts

Re: blurred pics when up-loaded

by Buz Groshong » Tue Aug 07, 2012 10:19 pm

Shots, like that one, that show a large gradation of tones (such as the various shades of white) are the most vulnerable to high J-peg compression. For shots like that you want to be sure and keep the j-peg quality level high.

User Avatar
lcarreau

 
Posts: 4215
Joined: Thu Sep 06, 2007 10:27 pm
Thanked: 1877 times in 1395 posts

Re: blurred pics when up-loaded

by lcarreau » Wed Aug 08, 2012 1:33 am

Buz Groshong wrote:Shots, like that one, that show a large gradation of tones (such as the various shades of white) are the most vulnerable to high J-peg compression. For shots like that you want to be sure and keep the j-peg quality level high.


But Buz ... HOW do you keep the j-peg level high ?

The same thing happened on one of my recent pics from AK ...

Image

http://www.summitpost.org/dragonback-in-the-outback/804481/c-248612
"Turkey Vultures always vomit when they get nervous."

User Avatar
MoapaPk

 
Posts: 7779
Joined: Fri May 13, 2005 7:42 pm
Thanked: 787 times in 519 posts

Re: blurred pics when up-loaded

by MoapaPk » Wed Aug 08, 2012 3:45 am

sharperblue wrote:The file size pre- and post- is the same, but clearly something is being lost in translation


The same, in megabytes?

User Avatar
Buz Groshong

 
Posts: 2845
Joined: Tue Sep 14, 2004 10:58 pm
Thanked: 687 times in 484 posts

Re: blurred pics when up-loaded

by Buz Groshong » Thu Aug 09, 2012 9:00 pm

Uploading it should not change the compression - unless SP runs it through a program to reduce file size before saving it.

User Avatar
sharperblue

 
Posts: 447
Joined: Wed Dec 06, 2006 4:05 am
Thanked: 80 times in 58 posts

Re: blurred pics when up-loaded

by sharperblue » Thu Aug 09, 2012 9:09 pm

can't figure it out either - same file size and type before and after uploading, and no consistency of whether or not the problem recurs from one pic to the next. think i'll ju8st live with it, but was curious if I were committing some unknown but common graphic blasphemy. thx anyway gents

User Avatar
MoapaPk

 
Posts: 7779
Joined: Fri May 13, 2005 7:42 pm
Thanked: 787 times in 519 posts

Re: blurred pics when up-loaded

by MoapaPk » Thu Aug 09, 2012 9:19 pm

It looks pretty clear to me. Comes back as 93% quality, subsampling off, 1.67 MB. Have you tried viewing it with different browsers?

Maybe if you download the picture to another website, we can judge the difference.

User Avatar
mrchad9

 
Posts: 4495
Joined: Thu Jul 02, 2009 12:01 am
Thanked: 1324 times in 900 posts

Re: blurred pics when up-loaded

by mrchad9 » Thu Aug 09, 2012 11:55 pm

Hi Matt! Might we have any changes/improvements to SP anytime soon?

User Avatar
norco17

 
Posts: 847
Joined: Tue Dec 02, 2008 12:53 am
Thanked: 200 times in 135 posts

Re: blurred pics when up-loaded

by norco17 » Fri Aug 10, 2012 12:33 am

MoapaPk wrote:It looks pretty clear to me. Comes back as 93% quality, subsampling off, 1.67 MB. Have you tried viewing it with different browsers?

Maybe if you download the picture to another website, we can judge the difference.


Looks good unless I zoom in. Then looks like a sharpness/shake issue (loss of line sharpness) hard to tell though without seeing the original. Can you upload to another site so we can compare?

User Avatar
Josh Lewis

 
Posts: 3320
Joined: Thu Jan 06, 2011 11:12 pm
Thanked: 1012 times in 624 posts

Re: blurred pics when up-loaded

by Josh Lewis » Sat Aug 11, 2012 8:44 pm

You mentioned PS which I assume you mean Photoshop. Last year I started experimenting with Photoshop and posted the photos on SP. The quality was indeed reduced! Even the original had pixels and saturation that did not exist before I posted it. So it turns out that Photoshop adds something to the photo. So I do something I call "Photo Laundering" where I use Picasa 3, do a slight edit (that actually does nothing) and it takes off the PS data which fixes the problem when I reupload the photo to SP! :D

Weird, but it works. There is some sort of processing from what I understand.


Return to Site Feedback

 


  • Related topics
    Replies
    Views
    Last post

Who is online

Users browsing this forum: No registered users and 0 guests