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ThierryD
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HDR Images For A.net?

Tue Jan 15, 2008 9:12 pm

Hi guys,

I'm about to get the new Corel Paint Shop software which has a very nice feature called HDR; more details can be found in Flo's thread from 2006: HDR Images (with Visible Movement) Allowed? (by INNflight Jul 3 2006 in Aviation Photography)
and since the upload rules for A.net have been modified recently I was wondering if they might also have for HDR images.
So question to the screeners: are HDR photos now allowed on A.net?
Would definitely be a great thing for cockpit shots!  Smile

Thierry
"Go ahead...make my day"
 
photopilot
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RE: HDR Images For A.net?

Tue Jan 15, 2008 9:27 pm

You know, the moment someone touches the levels, gamma, curves, or even the brightness/contrast or shadow/highlight, they are changing the Dynamic Range of an image. Not to mention when people mask either the highlights or shadows in order to adjust the rest of an image. HDR images are nothing more than an extension of that issue.

However..... composite images are not allowed, which means that an HDR image derived from a single RAW file should be ok, but an HDR image derived from multiple exposure frames would not be. A technical distinction, but within what present rules allow.

Now we need some screeners input.... and justifications besides a simple Yes/No type answer.

IMHO,
Steve
 
timdegroot
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RE: HDR Images For A.net?

Tue Jan 15, 2008 10:53 pm

Only motive rules have changed not editing rules so no HDR allowed

CHeers
Tim
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aviopic
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RE: HDR Images For A.net?

Tue Jan 15, 2008 11:27 pm



Quoting ThierryD (Thread starter):
I'm about to get the new Corel Paint Shop software which has a very nice feature called HDR

Thierry as far as I know there is nothing new under the sun and is HDR as it is called nowadays not much different from a very old technique called "Stacking" which was already in use when there was only b/w film available.

Quoting Timdegroot (Reply 2):
Only motive rules have changed not editing rules so no HDR allowed

I have no objection Tim but what is the difference between HDR and putting all kind of layers on top of each other ?
And to be honest it is something I do all the time when I am not happy with the levels.
By adding an extra layer with different levels which are then "flowed" together you have in essence a HDR result.
The truth lives in one’s mind, it doesn’t really exist
 
photopilot
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RE: HDR Images For A.net?

Tue Jan 15, 2008 11:36 pm

So like everything else here at A.net, is there going to be a "Technical Specification" on allowable gamma before an image is classified as HDR, or will it become another subjective rejection reason, interpreted differently depending on the luck of the draw and which screener you get?

As noted, people are already stacking layers and blending them to achieve the technical perfection required of this site.
Simply stating......

Quoting Timdegroot (Reply 2):
Only motive rules have changed not editing rules so no HDR allowed

doesn't quite cut it as an accurate description to a technical issue.

thanks
 
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ThierryD
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RE: HDR Images For A.net?

Wed Jan 16, 2008 1:27 am



Quoting Timdegroot (Reply 2):
Only motive rules have changed not editing rules so no HDR allowed

Fair enough; thanks Tim!

Quoting Aviopic (Reply 3):
Thierry as far as I know there is nothing new under the sun and is HDR as it is called nowadays not much different from a very old technique called "Stacking" which was already in use when there was only b/w film available.

Agreed Willem, but it took a little more than half a dozen mouse clicks and 10 seconds of your lifetime.  Wink So it's a feature I'll surely use in the future to improve shots like the mentionned cockpit photos, which are always a nightmare to expose correctly, though not for uploading to A.net then.

Quoting Aviopic (Reply 3):
And to be honest it is something I do all the time when I am not happy with the levels.
By adding an extra layer with different levels which are then "flowed" together you have in essence a HDR result.

SCANDAL!!!!! How dare you!!  Big grin
Seriously though, and that might also answer Steve's questions, I think the borderline can be drawn by the fact that in the HDR case you're actually merging 2 or more different photos whereas in the other cases you merge layers of one and the same photo.

Thierry
"Go ahead...make my day"
 
tweetdriver
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RE: HDR Images For A.net?

Wed Jan 16, 2008 6:29 am

Well but what if you do a HDR out of a single RAW file?
 
IL76
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RE: HDR Images For A.net?

Wed Jan 16, 2008 7:02 am



Quoting TweetDriver (Reply 6):
Well but what if you do a HDR out of a single RAW file?

Then it's not an HDR image. It's just playing with the levels of a single image.

E
 
sulman
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RE: HDR Images For A.net?

Wed Jan 16, 2008 8:41 am



Quoting IL76 (Reply 7):
Then it's not an HDR image. It's just playing with the levels of a single image.

A distinction worthy of a lawyer.

One could assert that it's possible to create several different exposures from a single raw file; so I think there's an argument there that it is at least analogous to HDR.


Cheers

J
It takes a big man to admit they are wrong, and I am not a big man.
 
diezel
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RE: HDR Images For A.net?

Wed Jan 16, 2008 9:03 am



Quoting Aviopic (Reply 3):
but what is the difference between HDR and putting all kind of layers on top of each other

An HDR image consists of multiple images taken seperately and then stacked together. It's not a single image and in my opinion the screeners are right. HDR images should not be allowed in the DB.

Roel.
Never be afraid of what you like. (Miles Davis)
 
TZ
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RE: HDR Images For A.net?

Wed Jan 16, 2008 9:18 am



Quoting ThierryD (Thread starter):
So question to the screeners: are HDR photos now allowed on A.net?

As others have already said, the answer is absolutely not.

The only recent rule changes are:
1. Extension of the allowable subjects for the SPACE category,
2. Expansion of allowable criteria for composition, to allow more "creative" compositions.

There have been no concessions on editing. No "creative" editing is allowed now, or before.

TZ
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