| Author | Thread |
|
|
06/17/2003 08:43:24 AM · #1 |
| Would it be permissible to select an entire image in photoshop and skew it in order to remove converging verticles of tall buildings? It is possible to use a lens on SLRs that does this, so I would have thought so... |
|
|
|
06/17/2003 08:49:40 AM · #2 |
I shoot a lot of buildings and generally clean them up using the Perspective command. However, I have never used that on a dpc entry because, to me, it seems to clearly violate at least the spirit of the rules here.
YMMV.
Message edited by author 2003-06-17 08:50:29.
|
|
|
|
06/17/2003 08:51:22 AM · #3 |
I asked about this in the site council forum a while back and basically the majority of council members voted 'no'. So i'm afraid this wouldnt be legal.
|
|
|
|
06/17/2003 08:55:18 AM · #4 |
| Hmm... don't know about dodging and burning, but this seems like a much more important bit of post-processing I believe we should be allowed to use! |
|
|
|
06/17/2003 09:08:24 AM · #5 |
|
|
|
06/17/2003 09:52:45 AM · #6 |
Originally posted by BobsterLobster:
It is possible to use a lens on SLRs that does this, so I would have thought so... |
There are PC ( Perspective Control ) type lenses for SLR's. Ive never used one, but I believe they basically shift the front and rear lens elements to correct the perspective.
|
|
|
|
06/17/2003 10:23:40 AM · #7 |
Originally posted by Konador:
I agree |
Why? This completely changes the image. Not just the exposure or the colour, but the image itself.
|
|
|
|
06/17/2003 10:27:03 AM · #8 |
In my opinion its just like resizing, and it is used to help barrel distortion created by lenses. It isn't spot editing because you're not really changing anything.
|
|
|
|
06/17/2003 10:49:19 AM · #9 |
It is used to make lines that converge in normal vision appear to be straight. That changes the image completely. It has little to do with barrel distortion (although I can see how it would help there, too).
Note: I think it is a very useful filter, just not for dpc.
Message edited by author 2003-06-17 10:50:31.
|
|
|
|
06/17/2003 10:52:24 AM · #10 |
I don't even regard it as a filter.
|
|
|
|
06/17/2003 11:17:03 AM · #11 |
I think use of the perspective tools needs to be mentioned in the rules. It's fairly common for some folks to use it (like dodge and burn) and though it has little to do with "spot editing" it does completely realign the photo when used correctly.
Also, i'm pretty sure people have used it in the past, thinking it was legal.
|
|
|
|
06/17/2003 11:34:49 AM · #12 |
Perhaps we tend to see buildings straighter than they actually are (unless you're standing right under it where the effect is greatest)... point being, I think shift lenses (and perspective correction) are used to bring the picture back to what an observer would see... I don't think we need to tilt our eyes sometimes as much as we need to tilt the camera to get a large object in the frame...
So perspective correction, when done in the usual fasion, can just correct the photo so that it looks like what we were seeing when we pressed the shutter...
Correct me if I'm wrong :)
Originally posted by Jak:
It is used to make lines that converge in normal vision appear to be straight. That changes the image completely. It has little to do with barrel distortion (although I can see how it would help there, too).
Note: I think it is a very useful filter, just not for dpc. |
|
|
|
|
06/17/2003 11:59:23 AM · #13 |
It can be quite useful. I don't know whether it should be allowed on DPC or not. I'm ambivalent.
With
Without
|
|
|
|
06/17/2003 01:33:20 PM · #14 |
I am rather ambivalent about this myself. On the one hand it does change the image a lot... but if used correctly it doesn't add anything to the photo or cause it to look overly manipulated. (Kavey's examples are an excellent demonstration of this.)
People can do much stranger looking things to their photos by not preserving the aspect ratio when resizing. Which, I believe, is legal. |
|
Home -
Challenges -
Community -
League -
Photos -
Cameras -
Lenses -
Learn -
Help -
Terms of Use -
Privacy -
Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 08/29/2025 06:56:17 PM EDT.
