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DPChallenge Forums >> Current Challenge >> Vignetting in Basic?
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02/26/2005 12:58:29 AM · #1
Earlier today I submitted a photo with vignetting around the subject because the outside edges detract from the central subject.

I just realized, vignetting probably isn't allowed in basic challenges. Am I right?

02/26/2005 01:02:12 AM · #2
One 'legal' way I am aware of is with the camera raw plug-in for ps-cs, not sure about any others. But certainly doing it the 'traditional' way in PS I would think is a no-no.
02/26/2005 07:49:49 AM · #3
what is vignetting ?
02/26/2005 07:56:08 AM · #4
For an explanation of vignetting can be found here: //www.vanwalree.com/optics/vignetting.html
02/26/2005 07:57:58 AM · #5
Originally posted by goodman:

what is vignetting ?


The dark corners in this photo:


It can come with the lens itself (the barrel is to narrow for the image circle needed), or you can add it afterwards in any color you want.

If the vignetting is based on a selection it is illegal. If it is made with a brush = illegal.
02/26/2005 09:51:07 AM · #6
It's legal if it is ajusted in PS CS raw because the effect is aplied to the whole image and not selected pixels.
02/26/2005 09:52:30 AM · #7
If you want to email me what you have in mind, we can make a ruling. I will PM you with an email address to use.

-Terry
02/26/2005 10:42:22 AM · #8
Originally posted by nsbca7:

It's legal if it is ajusted in PS CS raw because the effect is aplied to the whole image and not selected pixels.


This cannot be true, surely? By definition vignetting darkens some pixels more than others, and this is functionally the same thing as burning in the corners. Since no burning or dodgin is allowed in basic challenges, I see no way that vignetting applied post-exposure would be legal.

If you want to make "legal" vignetting, create a lens hood that extends into the field-of-view of the lens.

Robt.
02/26/2005 10:59:11 AM · #9
Originally posted by bear_music:

Originally posted by nsbca7:

It's legal if it is ajusted in PS CS raw because the effect is aplied to the whole image and not selected pixels.


This cannot be true, surely? By definition vignetting darkens some pixels more than others, and this is functionally the same thing as burning in the corners. Since no burning or dodgin is allowed in basic challenges, I see no way that vignetting applied post-exposure would be legal.

If you want to make "legal" vignetting, create a lens hood that extends into the field-of-view of the lens.

Robt.


That would be my interpretation. This has in fact seen some past SC discussion. Just because it can be done in the RAW converter does not mean it is defintiely legal. If it selectively affects the outer areas (or inner areas for that matter) it could possibly be ruled illegal. I can't say for certain, it would need review by the entire SC.
02/26/2005 11:44:26 AM · #10
I would think one thing goes without saying:

For the purposes of DPC rules, any RAW converter that alters the image in any way qualifies as an "editing" program, and any effects gained from the converter would have to be legal within the operative set of editing rules. Any other approach is like giving extra leeway to people who have sophisticated skills and/or sophisticated equipment.

Robt.
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