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03/31/2014 05:37:42 PM · #1 |
I would appreciate some clarification on the following Advanced rule:
You must:
create your entry from 1-10 captures of a single scene (defined as a scene whose composition/framing does not change). All captures used must be shot within the challenge submission dates.
How strict is the "composition/framing does not change" rule?
For example if I took 2 photos of a stationary face and the only change between the 2 photos was a different focus point then I assume this is fine.
However if I take 2 photos of a face and the head rotated say 15 degrees between the 2 photos - but nothing else changed, would this be considered changing the composition/framing?
Basically I was trying to do some focus stacking and wasn't sure if what I did would be legal. |
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03/31/2014 06:42:01 PM · #2 |
Focus stacking is legal, no doubt about that. As far as compositional changes, small composition changes that are within the expectations of hand-held shot-to-shot differences *should* be OK if no part of the final image falls outside the bounds of any of the component images.
If when you say that the rotation of the face changed you mean that the subject moved, that I would not feel confident to comment on. I would recommend passing it by the SC prior to submitting it. |
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03/31/2014 07:15:07 PM · #3 |
Focus stacking is fine. There WILL be slight registration issues that you deal with in compositing and if you don't do a "perfect" job it shouldn't get you DQ'd. Unless you do something so off-the-wall that it begins to qualify as the forbidden "double exposure.
Basically, when focus stacking or creating HDR images, if the final image, the composite, has the appearance of a single-frame image, well that's the goal. To the extent that your processing deviates from that norm (except in Expert Editing) you will be running into issues.
The fuzzy part comes up when something out-of-the-matrix shows up on one or more of the frames, but not all of them. We're fine with waves that move, so they don't register through all the frames, branches that move in the breeze, all that; it's an inevitable part of HDR landscapes and the better you get at making them the better you'll be able to eliminate any discrepancies.
But you can't legally produce an HDR image where a significant component just shows up in passing. We DQ'd, some years ago, a beautiful night shot of a pond, stars, trees, the works, because a swan wandered into the shot for one frame and the photographer strobed the swan. That was effectively combining two different images, a landscape and a shot of a bird, different lighting even. You basically shouldn't even be trying to MAKE HDR images where significant, subject-type portions are changing measurably from frame to frame: that's when it's safer to choose your best frame and do a pseudo-HDR, tone mapping the single frame.
In a related sense, we don't allow the ELIMINATION of objects by multiple-frame merging either. You can't stand at a busy street corner photographing a building across the street and then use difference-stacking to eliminate ALL the people, wondrous as that is. Personally, I'd love to see it acceptable, but currently it's not. I know because I asked, years ago, and got an emphatic "NO!". Now I'm SC myself, and certainly nobody's told me that's changed...
So these are my thoughts on the matter, but they are just MY thoughts, MY understanding of the rules, and I'm just one voice in the process. It's a very complex rule to enforce. |
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03/31/2014 07:33:21 PM · #4 |
Originally posted by Bear_Music:
In a related sense, we don't allow the ELIMINATION of objects by multiple-frame merging either. You can't stand at a busy street corner photographing a building across the street and then use difference-stacking to eliminate ALL the people, wondrous as that is. |
B+W #110 .. :D |
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03/31/2014 07:46:37 PM · #5 |
Originally posted by Cory:
Originally posted by Bear_Music:
...You can't stand at a busy street corner photographing a building across the street and then use difference-stacking to eliminate ALL the people, wondrous as that is. |
B+W #110 .. :D |
What's the difference? ;-)
Message edited by author 2014-03-31 19:46:59. |
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03/31/2014 08:43:53 PM · #6 |
[quote=Bear_Music] Focus stacking is fine. There WILL be slight registration issues that you deal with in compositing and if you don't do a "perfect" job it shouldn't get you DQ'd. Unless you do something so off-the-wall that it begins to qualify as the forbidden "double exposure.
ah yes. maybe we NEED a challenge, "The Forbidden Double Exposure." Unless that is the title of some mystery story...
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04/01/2014 02:15:40 AM · #7 |
Thank you for the clarification.
Here is an example just to further clarify this:
I was not sure if the following 2 photos could be combined legally
 
But was sure the following 2 would be safe:
In the first example I may have just wanted to use the nose as it is in focus so would have layered the first photo on top of the second and erased everything apart from the nose and then shifted, rotated and scaled the nose to ensure it aligns. As I write this I feel I am confirming this would not be legal.
Whereas with my second example I would not need to do much shifting, rotating or scaling.
I am curious what is allowed here.
The end result would be something like this:
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04/01/2014 02:58:42 AM · #8 |
Originally posted by kirbic:
Originally posted by Cory:
Originally posted by Bear_Music:
...You can't stand at a busy street corner photographing a building across the street and then use difference-stacking to eliminate ALL the people, wondrous as that is. |
B+W #110 .. :D |
What's the difference? ;-) |
Something like $50-$130 depending on your filter size and whether or not you go for the MRC coated filter. ;) |
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