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Leveling Question  
User currently offlineJayDavis From United States of America, joined Jan 2001, 2000 posts, RR: 15
Posted (8 years 8 months 14 hours ago) and read 1408 times:

The weather wasn't that great at DFW today nor was the action of the planes coming in. However, we got a couple of shots of some planes taxiing by Founder's Plaza and I have a question about them.

If you've ever been out there, you'll know the angle I am shooting at so how in the world do you ever actually "level" the shots to make them acceptable to be uploaded on this site?

Here are two examples, with no retouching at all.

http://img221.imageshack.us/img221/5213/n640rw1qf.jpg

and

http://img78.imageshack.us/img78/3558/hprj0sq.jpg

7 replies: All unread, jump to last
 
User currently offlineGlennstewart From Australia, joined Jun 2003, 1124 posts, RR: 54
Reply 1, posted (8 years 8 months 12 hours ago) and read 1392 times:

This is understandably a common question; and a completely relevant one.

You've suggested the most common and reliable method: rotation with the use of vertical structures (e.g. fences, buildings, light poles). This thankfully works for the majority of shots.

It seems every airport has a poorly leveled section in which even rotating with the above rule seems to produce weird looking shots.

My rules for editing go something like this:

1. Rotate using verticals that are actually 90 degrees (we all know that airport light poles aren't always planted straight)
2. If in doubt, rotate until it "feels right" and "looks right".

Your second shot for example of the America West CRJ looks wrong. You could probably rotate using the fence in the background, but even then it might still look wrong.

It's not an official screening recommendation, but keep rotating bit by bit in cases like this until you get to a point where you know it's right. Oh.... make sure you reverse each rotation, because rotation upon rotation will only add error to the shot.

Glenn



Respected users.... If my replies are useful, then by all means...
User currently offlineJayDavis From United States of America, joined Jan 2001, 2000 posts, RR: 15
Reply 2, posted (8 years 8 months 11 hours ago) and read 1378 times:

Glenn,

Thanks for the reply. I don't understand your last comments though.
Make sure you reverse each rotation, because rotation upon rotation will only add error to the shot?

What do you mean with this comment? I'm totally confused by it.


As for the other tips, that is my problem. It just seems some shots, no matter how hard you try, you just can't get them to "look level".........this spot at DFW poses a very hard choice each and every time you shoot there.


Jay


User currently offlineBubbles From Canada, joined Apr 2005, 1196 posts, RR: 51
Reply 3, posted (8 years 8 months 10 hours ago) and read 1371 times:
AIRLINERS.NET CREW
PHOTO SCREENER

Quoting JayDavis (Reply 2):
What do you mean with this comment?

Hi Jay,

I think Glenn meant, before doing next trial rotation, you should make sure you have rolled back (or reversed) the previous rotation you made; or in other words, in simple, the image should only be rotated once from the original state, and recursive rotations (rotation upon rotation) will add error to the shot.

E.g., you did CW rotation 1.0 to a photo, and felt it had been done too much. You should roll back that rotation; and try CW rotation 0.7 and see if it's good. If not, you should continue above steps. But you shouldn't rotate CW 1.0, then CCW 0.3, etc.  Wink

_Hongyin_

[Edit: give an example.]

[Edited 2006-04-24 06:10:14]

User currently offlineGlennstewart From Australia, joined Jun 2003, 1124 posts, RR: 54
Reply 4, posted (8 years 8 months 9 hours ago) and read 1353 times:

Quoting JayDavis (Reply 2):
Thanks for the reply. I don't understand your last comments though.
Make sure you reverse each rotation, because rotation upon rotation will only add error to the shot?

Hongyin understood correctly...

I meant (Photoshop keys as an example):

1. Rotate 0.5 degrees
2. Correct?
3. If not: Undo - Ctrl + Z
4. Rotate 0.6 degrees
5. Correct?
6. If not: Undo - Ctrl + Z
7. Rotate 0.7 degrees


If you rotate 0.5, then 0.1, then 0.1 to achieve 0.7 rotation, you have introduced errors to the shot.

Always undo a change that wasn't successful (unless you're doing colour/contrast/level changes - you can actually fade these but that's another thread altogether).

Glenn



Respected users.... If my replies are useful, then by all means...
User currently offlineJayDavis From United States of America, joined Jan 2001, 2000 posts, RR: 15
Reply 5, posted (8 years 7 months 3 weeks 6 days 23 hours ago) and read 1322 times:

Glenn and Bubbles,

Thanks for the explanation.

I did not realize that about making an rotation in Photoshop.


Thanks!


Jay


User currently offlineZSOFN From United Kingdom, joined Jun 2005, 1413 posts, RR: 5
Reply 6, posted (8 years 7 months 3 weeks 6 days 22 hours ago) and read 1305 times:

The way I do it when there's no obvious levelling reference in the photo is imagine I'm balancing the camera on a pole at the angle at which I took the shot. If, as I look at it, I imagine it toppling over to one side, then I need to correct it accordingly.

I would say your first shot needs some CCW rotation and the 2nd shot some CW.


User currently offlineGlennstewart From Australia, joined Jun 2003, 1124 posts, RR: 54
Reply 7, posted (8 years 7 months 3 weeks 6 days 13 hours ago) and read 1283 times:

A handy tool in Photoshop for rotation is the "measure tool".

http://www.webdesign.org/web/photosh...es-with-the-measure-tool.3717.html



Respected users.... If my replies are useful, then by all means...
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