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blurred pics when up-loaded

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blurred pics when up-loaded

Postby 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!
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Re: blurred pics when up-loaded

Postby 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?
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Re: blurred pics when up-loaded

Postby 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!
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Re: blurred pics when up-loaded

Postby 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.
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Re: blurred pics when up-loaded

Postby 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
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Re: blurred pics when up-loaded

Postby 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?
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Re: blurred pics when up-loaded

Postby 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.
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Re: blurred pics when up-loaded

Postby 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
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Re: blurred pics when up-loaded

Postby 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.
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Re: blurred pics when up-loaded

Postby Montana Matt » Thu Aug 09, 2012 10:09 pm

The original image is untouched when uploaded to SP. The large, medium, small and thumbnails are all generated on the fly and there is some loss of quality when that happens. But the original image is exactly the same as the one on the computer you upload from.

As MoapaPk suggested, have you tried viewing it in different browers? Or downloading the image and viewing it with the same photo viewer that you're viewing the original with?
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Re: blurred pics when up-loaded

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

Hi Matt! Might we have any changes/improvements to SP anytime soon?
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Re: blurred pics when up-loaded

Postby Montana Matt » Fri Aug 10, 2012 12:04 am

mrchad9 wrote:Hi Matt! Might we have any changes/improvements to SP anytime soon?

Next big project is likely going to be a server upgrade sometime this fall. I've not had much time to spend on SP this summer at all other than basic maintenance things. It's been long enough now since SPv2, I'd like to see SPv3 at some point in the not too distant future, but this is just an idea in my head at this point.
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Re: blurred pics when up-loaded

Postby 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?
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Re: blurred pics when up-loaded

Postby 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.
My Websites: Alpine Josh · Alpine Ascent · AceMaps
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