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01/25/2006 09:14:00 PM · #1 |
I want to fix a horizon that is bowed slightly due to my lens opened at its widest. Two questions regarding this:
1. Is it legal in advance editing to correct this distortion and make it straight?
2. How do you do this photoshop? Can you go step by step if you know?
Thanks everyone. You never let me down...
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01/25/2006 09:29:49 PM · #2 |
1. I believe so. I think I remember this being asked before and SC saying yes (but don't quote me on it).
2. Select, All. Edit, Transform, Distort or Edit, Transform, Perspective. I think those are the most likely to be of use.
Message edited by author 2006-01-25 21:31:21. |
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01/25/2006 09:31:09 PM · #3 |
| I don't think this is what he's talking about kearock. the distortion is caused by the lens and not the tilt of the camera. |
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01/25/2006 09:34:15 PM · #4 |
| Yeah...I know what he's talking about. I'm rethinking my methods...problem is I can't find a curved horizon shot to test it on. |
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01/25/2006 09:35:38 PM · #5 |
PS CS2, I believe, has corrections for bareel and pincushion distortion. Richard Rosenmann sells and inexpensive "Lens Correction Pro" that works ine arlier versions of PS; I used it with my Coolpix 5700.
R. |
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01/25/2006 09:47:41 PM · #6 |
| ok...I'm thinking now I was wrong. I could have sworn I remembered using one of those tools to do this somehow, but I can't seem to make it work now. |
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01/25/2006 09:49:31 PM · #7 |
Now I'm having some luck with Filter, Distort, Pinch.
I'm in CS (1) by the way. |
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01/25/2006 09:50:03 PM · #8 |
| Kearock's method works fine for lens distortion too, in cases where the horizon is low in the frame & bowed due to ultra-wide lens effect, e.g. 10mm or so (of course the sky at the top is also correspondingly "bowed" but how would you know?) Using the Distort function under Transform will give the best fine control to level the horizon in this situation. As for legal in advanced, it has to be - it certainly doesn't involve any action that is either specifically or implicitly prohibited. |
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01/25/2006 09:52:07 PM · #9 |
| Filter, Ditort, Spherize also seems to have possibilities. |
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01/25/2006 09:52:41 PM · #10 |
| so, distorting an image is allowed in Basic? |
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01/25/2006 09:53:17 PM · #11 |
| Also, if you want to align to something straight, View, Show, Grid is your friend. |
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01/25/2006 09:54:18 PM · #12 |
Originally posted by crayon:
so, distorting an image is allowed in Basic? |
I think we're talking Advanced editing here. It wouldn't be allowed in basic because it moves pixels (even though it moves them by a uniform function). I think.
Message edited by author 2006-01-25 21:54:33. |
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01/25/2006 10:09:05 PM · #13 |
Originally posted by kearock:
Originally posted by crayon:
so, distorting an image is allowed in Basic? |
I think we're talking Advanced editing here. It wouldn't be allowed in basic because it moves pixels (even though it moves them by a uniform function). I think. |
Oh I'm sorry. I meant to ask, is distorting an image allowed in Advance? Example, what if I used some fish-eye filters in photoshop? |
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01/25/2006 10:18:16 PM · #14 |
Originally posted by crayon:
Originally posted by kearock:
Originally posted by crayon:
so, distorting an image is allowed in Basic? |
I think we're talking Advanced editing here. It wouldn't be allowed in basic because it moves pixels (even though it moves them by a uniform function). I think. |
Oh I'm sorry. I meant to ask, is distorting an image allowed in Advance? Example, what if I used some fish-eye filters in photoshop? |
I'm pretty sure I remember this being discussed at some point in the past and the SC saying distortion was OK, but I could have completely imagined it. |
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01/25/2006 10:23:04 PM · #15 |
Originally posted by kearock:
I'm pretty sure I remember this being discussed at some point in the past and the SC saying distortion was OK, but I could have completely imagined it. |
you know, things like, creating a spiral from a not-so-spiralled line, things like that? Thanks |
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01/25/2006 10:25:10 PM · #16 |
| You may get into trouble with major elements using the distortion filter. |
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01/25/2006 10:26:14 PM · #17 |
Originally posted by crayon:
Originally posted by kearock:
I'm pretty sure I remember this being discussed at some point in the past and the SC saying distortion was OK, but I could have completely imagined it. |
you know, things like, creating a spiral from a not-so-spiralled line, things like that? Thanks |
That would be a "probably not." Currently, the idea is to use the tools to correct imperfections in the photo, but not to create wholly new objects or effects. |
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01/25/2006 10:32:28 PM · #18 |
so General, or any other SC, I can use a tool to straighten out a horizon? Thanks....
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01/25/2006 10:35:52 PM · #19 |
Originally posted by Cutter:
so General, or any other SC, I can use a tool to straighten out a horizon? Thanks.... |
I believe under Advanced Rules it should be legal to use either the Perspective tool or the Barrel Distortion tool to correct the problem.
Using the same tools to take a straight horizon and create the curvature might not be ...
I hope you're able to get a couple of more opinions though : ) |
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01/25/2006 10:52:39 PM · #20 |
As GeneralE stated, correction of barrel or pincusion distortion is legal under Advanced. The opposite, where you take a normal image and make a fisheye shot out of it by distorting it, is not.
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01/25/2006 10:53:23 PM · #21 |
great, thanks for the help. correction is allowed.
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