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03/08/2011 11:21:35 AM · #1 |
I have 2 rules questions.
For Basic editing:
Is it ok to correct lens distortion for an image? The rules say you can crop/rotate/resize but nothing about correcting distortion.
For Advanced:
The rules say you can combine multiple exposures. I always assumed it was just for creating multiple exposure HDR images, but is it allowed to stack multiple images? It's the same framing where exposures are taken in succession but some elements like clouds are moving.
I did message the SC last week with this question but haven't had a response yet so figured I'd see if anyone else knows.
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03/08/2011 11:29:06 AM · #2 |
1. You can not correct lens distortion in basic.
2. Usually that is ok if I understand your question correctly. |
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03/08/2011 11:29:08 AM · #3 |
Lens correction in basic -- no.
multiple photos: If elements have moved between, then it's tricky. I think if it's a major element, then you can't, but minor things like clouds I think are acceptable.
I believe there was one example where a swan moved in and out of the frame during the exposures that was DQd.
If it's minor cloud movement, I would think it would be ok. If it's major cloud movement, you might have problems. |
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03/08/2011 12:44:37 PM · #4 |
I believe that the safe response for question 2 is the following:
- You may stack for exposure, if there is no movement, or only incidental movement(1) between frames
- You may stack to increase DoF, again with the limitation on movement
- You may stack to reduce noise, within limitations on movement
- You may *not* stack to create a panorama (framing is not the same)
- You may *not* stack to enhance movement, essentially creating a longer exposure by stacking(2)
- You may *not* stack to remove subject matter, e.g. create a people-free city scene
(1) Things like moving clouds would probably fall outside of allowable movement, unless the movement is very small.
(2) This applies to things like creating star trails out of multiple shorter exposures. This ruling is most unfortunate because it encourages poor practice, but it is what it is.
Message edited by author 2011-03-08 12:45:16. |
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03/08/2011 03:26:55 PM · #5 |
thanks everyone for responses.
guess the best thing is be safe and not submit the stacked shot. |
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03/08/2011 03:57:44 PM · #6 |
The general answer so far here have been correct, 1 is not legal in Basic, 2 depends on what's in the scenes being stacked. If you're uncertain about whether a stack is legal or not, contact the SC with an example of the original and final images, so that we can have a look at exactly what you're proposing.
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03/08/2011 04:17:12 PM · #7 |
I'm going to marginally hijack this thread since I have a question about basic as well. I know vignetting is not allowed, but what about a "soft" border? Something between vignetting and a standard black border? Sort of like a blurry black border, but clearly a border?
Message edited by author 2011-03-08 16:17:41. |
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03/08/2011 04:36:08 PM · #8 |
Originally posted by tanguera:
I'm going to marginally hijack this thread since I have a question about basic as well. I know vignetting is not allowed, but what about a "soft" border? Something between vignetting and a standard black border? Sort of like a blurry black border, but clearly a border? |
how are you proposing to make the border blurry without spot editing it? |
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03/08/2011 04:38:42 PM · #9 |
Originally posted by vawendy:
how are you proposing to make the border blurry without spot editing it? |
It's legal to make selections for the purpose of creating a border, in basic, and if you feather the selection you get a soft border. Is feathering legal in basic? I don't see anything that says you CAN'T feather the border selection, but I have never tried it.
R. |
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03/08/2011 04:48:06 PM · #10 |
Originally posted by Bear_Music:
Originally posted by vawendy:
how are you proposing to make the border blurry without spot editing it? |
It's legal to make selections for the purpose of creating a border, in basic, and if you feather the selection you get a soft border. Is feathering legal in basic? I don't see anything that says you CAN'T feather the border selection, but I have never tried it.
R. |
You can select for the purpose of creating a border? What do you do with that selection then? Do you fill outside the selected area with black? I just assumed that you had to add to the canvas size in basic. |
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03/08/2011 05:17:32 PM · #11 |
Originally posted by vawendy:
You can select for the purpose of creating a border? What do you do with that selection then? Do you fill outside the selected area with black? I just assumed that you had to add to the canvas size in basic. |
Once you select, you can fill with a color, or there are a number of other techniques available. basically anything that creates a recognizable border.
Where "soft" borders are concerned, the softer you get, the more you run the risk of it being perceived as something other than a border. Personally, I'd stay well away from anything that remotely could be perceived as a vignette, whether white, black or otherwise. |
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03/08/2011 05:21:56 PM · #12 |
Wendy, I use a fill layer in black, then using the marquee tool, draw a rectangle of whatever width I want the border, set the feather to whatever width I want, then backspace. I have it set to 30 right now, and it clearly looks like a border, but is a little softer on the image side.
Bear, I know it's a risk, but it's so right for this image. I guess I'll be the test balloon... |
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03/08/2011 05:22:24 PM · #13 |
Originally posted by kirbic:
Originally posted by vawendy:
You can select for the purpose of creating a border? What do you do with that selection then? Do you fill outside the selected area with black? I just assumed that you had to add to the canvas size in basic. |
Once you select, you can fill with a color, or there are a number of other techniques available. basically anything that creates a recognizable border.
Where "soft" borders are concerned, the softer you get, the more you run the risk of it being perceived as something other than a border. Personally, I'd stay well away from anything that remotely could be perceived as a vignette, whether white, black or otherwise. |
In my case, specifically, I occasionally use a selection 12 pixels in from the edge and stroke it with a 1-pixel white or black line to create an "inline" order, and then 'edit>fade' to make the inline into a hairline.
R. |
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03/08/2011 05:24:41 PM · #14 |
Originally posted by tanguera:
Wendy, I use a fill layer in black, then using the marquee tool, draw a rectangle of whatever width I want the border, set the feather to whatever width I want, then backspace. I have it set to 30 right now, and it clearly looks like a border, but is a little softer on the image side.
Bear, I know it's a risk, but it's so right for this image. I guess I'll be the test balloon... |
But a fill layer isn't an adjustment layer. Wouldn't you be DQd for that? |
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03/08/2011 05:25:52 PM · #15 |
| How else do you create borders (which I thought WAS legal in basic)? |
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03/08/2011 05:27:39 PM · #16 |
I change the canvas size.
However, I think you could probably just select and then select inverse and use the paint can to do your method? |
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03/08/2011 05:31:37 PM · #17 |
Originally posted by tanguera:
How else do you create borders (which I thought WAS legal in basic)? |
'Image>Canvas Size' is the normal way. I wouldn't worry about your technique though. Here's another way to do it so you don't have to crop the image with your border:
Go to 'File>New' and make a new, empty canvas, filled with black and significantly larger than your image. Then, on your image, select all, then 'modify selection' to shrink it by 12 pixels, say, then set the feather to 24 pixels, say, then copy the selection, go to the new, black canvas, and paste it there. You'll have a feathered image on a black border, and now you can crop this to whatever proportion of border looks right, and then resize to 800.
To those who might object that this, too, uses a pixel-filled layer, I'd just respond "What the heck you think is HAPPENING when you increase canvas size and fill it with black?"
R. |
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03/08/2011 05:38:00 PM · #18 |
| That sounds the same as my way except you're putting the selection behind, rather than in front. Hadn't thought about the border cropping the image, but of course it does. In this case, to the improvement of the image. I'll have to fiddle around with the technique you described, Bear. One of many, MANY things I've yet to learn to do in PS. |
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03/08/2011 06:09:31 PM · #19 |
At this point I recommend just enlarging the canvas, and not making any selections at all in Basic editing, and that the border color be solid, hard-edged, and different from any substantial portion of the edge area of the photo.
I know, yucky, but safe ...
Note that the border need not be rectangular, nor symmetrical ... |
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03/08/2011 06:12:37 PM · #20 |
Originally posted by GeneralE:
At this point I recommend just enlarging the canvas, and not making any selections at all in Basic editing, and that the border color be solid, hard-edged, and different from any substantial portion of the edge area of the photo.
I know, yucky, but safe ...
Note that the border need not be rectangular, nor symmetrical ... |
I get that the border need not be symmetrical, but something other than rectangular - what would that be and how would it be achieved?
Message edited by author 2011-03-08 18:13:33.
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03/08/2011 06:20:30 PM · #21 |
Originally posted by jomari:
Originally posted by GeneralE:
At this point I recommend just enlarging the canvas, and not making any selections at all in Basic editing, and that the border color be solid, hard-edged, and different from any substantial portion of the edge area of the photo.
I know, yucky, but safe ...
Note that the border need not be rectangular, nor symmetrical ... |
I get that the border need not be symmetrical, but something other than rectangular - what would that be and how would it be achieved? |
Draw an oval selection, invert it, delete the surround, and you have an oval image on a white background. Or make a rounded-corner rectangle, ditto. Many possibilities...
R.
Message edited by author 2011-03-08 18:21:10. |
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03/08/2011 06:22:53 PM · #22 |
Originally posted by Bear_Music:
Originally posted by jomari:
Originally posted by GeneralE:
At this point I recommend just enlarging the canvas, and not making any selections at all in Basic editing, and that the border color be solid, hard-edged, and different from any substantial portion of the edge area of the photo.
I know, yucky, but safe ...
Note that the border need not be rectangular, nor symmetrical ... |
I get that the border need not be symmetrical, but something other than rectangular - what would that be and how would it be achieved? |
Draw an oval selection, invert it, delete the surround, and you have an oval image on a white background. Or make a rounded-corner rectangle, ditto. Many possibilities...
R. |
Yes, I am familiar with those methods, but you can do that in basic?
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03/08/2011 06:25:12 PM · #23 |
Originally posted by jomari:
Yes, I am familiar with those methods, but you can do that in basic? |
Yes, you can. |
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03/08/2011 06:25:31 PM · #24 |
Originally posted by jomari:
Yes, I am familiar with those methods, but you can do that in basic? |
I don't know why not: about the only time you ARE allowed to use a selection in basic is in the creation of a border...
R. |
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03/08/2011 06:26:04 PM · #25 |
If you go to Image > Rotate Canvas > Arbitrary the triangular areas in the corner will be filled with the current Background color. With some careful cropping and further rotations you can achieve a variety of shapes -- I have an old example in this pBase Gallery. Here is one used on an actual entry, where I had to compose and shoot at an odd angle and couldn't really crop:
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