Oops, only admins know how to delete an account? Sounds kinda weird. Just cannot find an option in my account.
OK, many thanks!
Interesting.
- Ask two questions
- Get answers from users who want to help asking for more info
- Refuse to give feedback to those willing to help
- Throw rattle out of pram and demand to leave forums
Hardly courteous.
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I donât think that one of the main characteristics of trolls is politeness. 
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Interesting.
Ask two questions
Get answers from users who want to help asking for more info
Refuse to give feedback to those willing to help
Throw rattle out of pram and demand to leave forums
Hardly courteous.
No no, excuse me for the courteous. I do not throw my rattles anywhere.
Very sorry about the circumstances. But it does not make any sense to me to wait for two, three days for my contributions to be published and in the future perhaps even longer. And some posts are not published at all. That somehow seems ridiculous. Well, may be DxO is a chinese manufacturer. Then of course I could understand (a bit of bullying and censorship).
Iâm really sorry. Thany your very much for your great help, anyway. I appreciate it vey much!
I donât think that one of the main characteristics of trolls is politeness.
Well, well, I wouldnât say you sounded rude though.
Is there a reason you wonât simply upload an example of this problem in the form of a real photo, preferably raw, so we can review it and possibly resolve this issue for you?
Mark
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âŠassuming that the buildings actually stand straight, the best way to adjust perspective is, to use the Horizon tool to align the central building an then use the sliders of the Perspective tool to align the outer buildings vertically. If the buildings donât align under these circumstances, they donât stand straight (tower of Pisa) or the lens is terribly misaligned.
DPLâs perspective tools are built to correct shots that have been taken with less than ideal orientation. They are not made for effects like the ones shown in the movie InceptionâŠunless you use the ReShape tool.
Other than that, please consider that new usersâ entries to the forum are monitored and that, after reading somany posts, the monitoring and delay are switched off. Things are undoubtedly clear in your mind, but we cannot read it. That is why we need some text and preferably an image attached to a post or through a sharing service.
Hope that helps.
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âŠassuming that the buildings actually stand straight, the best way to adjust perspective is, to use the Horizon tool to align the central building an then use the sliders of the Perspective tool to align the outer buildings vertically. If the buildings donât align under these circumstances, they donât stand straight (tower of Pisa) or the lens is terribly misaligned.
Does that also work if the photo is made with the objective tilted down and rotated (around its long axis)?
That is why we need some text and preferably an image attached to a post or through a sharing service.
Excuse me, what text?
Sorry, I do not have an example in raw, hope, this is OK:
or
This one looks already edited.
George
Yes yes, absolutely, that is right, of course.
Here not edited:
or
OK. The downloaded file that you linked to is a PNG - something that PhotoLab cannot handle. So I converted it to JPG, but this is definitely not the original file.
All I did was to activate the Force Parallels tool and align the two guides like thisâŠ
Applying the tool then gives thisâŠ
And cropping to fit gives thisâŠ
Showing the grid shows that all the buildings are now properly vertical, although, due to the perspective, they look like they are wider at the top than the bottom. This is a well known optical illusion that can be minimised by using the right tool.
Instead of using the parallel lines tool from the top bar, you need to look at the Perspective palette and adjust the top/bottom slider until it looks rightâŠ
This gives the following before croppingâŠ
⊠and after croppingâŠ
Now the main building looks more ânormalâ but, of course, the buildings at the edge will still look a bit canted in. This is to be expected and can only be corrected by forcing parts of the image using the ReShape tool like thisâŠ
Although that has created a very obvious âstretchedâ appearance to the buildings on the left, as the tool has had to invent pixels to fill in the changed area and, on the right, the top right of the main building is starting to get distorted.
Does that help?
You can always try the magic wand to automatically try and do the right thingâŠ
⊠but the resulting changes mean that you will be missing an awful lot of skyâŠ
And it still isnât quite right.
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Thanks for playing around with the image. I got the suspicion of the optical illusion and wanted to check later today.
Automatic perspective correction can be limited to verticals (for this image) and moderated by taking the intensity slider down from 100.
The tilting of the lens has not compromised the alignment of the buildings, after all, even a shifted/tilted lens creates an image with a central symmetry.
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So, I followed that advice and got thisâŠ
⊠with these settingsâŠ
Quite reasonable I think, apart from the slight inwards lean on the sides, which has to be expected in avoiding the outward âgrowthâ on the main building.
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By what is that caused?
George
The human brain misinterpreting what the eyes see.
Thatâs a simple explanation. I need more.
George
When we look up, we see converging lines, but we know that they should be parallel. Our brain mixes the two ingredients to make things look like expectedâŠwithin certain bounds.
When we now see a PCâd image, we see a scene that seems level, but should be seen looking up. The brain therefore âcorrectsâ the image as it would, if we were actually looking up, making things look wider than they actually should.
When we walk a path, the borders of the path converge too, and our brain accepts it, because we look horizontally. Perception is intriguingâŠand we mostly interpret things before we consciously perceive themâŠwith the result that things might look ârightâ or âwrongâ even though they just are what they are.
When we look up the distance to the top is larger as the distance to the bottum. The further away, the less magnification the smaller that subject.
But when shooting that building so that the front of that building is parallel to the sensor, then the magnification is constant. No converging lines. It would be interesting to see the same image with a leveled camera.
George
As long the building is not to tall, you can do this with a WA lens and then crop off the âbottomâ in post.
I think Iâve done that already. But, from the camera position you are still looking upwards ⊠seeing balconies, window sills or in this case the air conditioners from underneath â handing off this information to the brain âŠ
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There are limits to what we should do with perspective corrections. Imagine shooting a recessed window from one side and then correcting the perspective in order to make the top and bottom parts parallel. Due to the recess, weâd see one side of the window frame and not the other. Weâll notice that something is wrong with that imageâŠ
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We also use 5" x 4" LF cameras with movements. Hereâs a couple of shots of tall buildings with the film plane vertical and the front raisedâŠ
https://grandes-images.com/en/Architecture.html#1
https://grandes-images.com/en/Architecture.html#4
indeed, we have found the limit to be around three to four floors.
Aah yes, the famous âhow to shoot a window without being in the pictureâ trick.
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