Perspective Correction - slanting verticals

Tiriel

Hey all,

Just wondering what you do to correct verticals. I'm using CS4 and haven't found any skew or way to correct these just yet, but I'm just after googling (finally) and saw that the lens correction tool should do what I need. It drives me mad looking at photos with strong verticals where those at the edge are all leaning in.



What would you use though for an image like this one - where the centre vertical looks straight, but the image feels like it's leaning to the right? It feels like it needs correction bottom left and top right.. but how would I go about doing that?


Any thoughts welcome!

Kenny Logins

Lightroom 5 has a new module for this purpose, it's not bad.

You do need a loose crop though as you can lose a lot of the frame when using a wide lens.

DaireQuinlan

I'd rotate a little bit left and perspective correct (if necessary). Get your horizontals right first and then correct for vertical perspective. AFAIK you can rotate in the lens correction tool but it's a PITA to do it other than by actually typing in values, the mouse control is messy so I'd generally do it using the ruler and straighten or rotate by whatever value the ruler is off by.

Kenny Logins

Short demo here -

https://www.youtube.com/watch?v=G-lhL1_uwmA

Tiriel

I don't actually have Lightroom installed but I believe himself has it so might bite the bullet and install it.

It drives me a bit mad and it seems to be more so on the 28mm prime lens than any of my others.

Kenny Logins

I just go by eye, and not the rulers. Don't care if the actual angles are off as long as the entire image sits right (with me).

Tiriel

Kenny Logins wrote: »

I just go by eye, and not the rulers. Don't care if the actual angles are off as long as the entire image sits right (with me).

Yep I'd agree with that. I think it's just when I know that the verticals on the edge of an image are obviously skewed it bugs me. Especially when you are going to crop an image because it highlights the vertical all the more.

DaireQuinlan

Kenny Logins wrote: »

I just go by eye, and not the rulers. Don't care if the actual angles are off as long as the entire image sits right (with me).

For the most part sure, but there are shots I take specifically square on and I can get a little anal about making that ... one ... vertical ... line up ... PROPERLY DAMNIT AARGH

Kenny Logins

DaireQuinlan wrote: »

For the most part sure, but there are shots I take specifically square on and I can get a little anal about making that ... one ... vertical ... line up ... PROPERLY DAMNIT AARGH

Yep. I hear ya.

My D7000 has an odd fault in that the viewfinder grid is slightly off. This has driven me mad for ages...

Tiriel

Kenny Logins wrote: »

Yep. I hear ya.

My D7000 has an odd fault in that the viewfinder grid is slightly off. This has driven me mad for ages...

A grid in your viewfinder.. now I must go and check is that something I've been blatantly ignoring! :P

Kenny Logins

Cork_girl wrote: »

A grid in your viewfinder.. now I must go and check is that something I've been blatantly ignoring! :P

I ignore that too now. :pac:

jpfahy

DXO Viewpoint rocks

almorris

Photoshop cc Raw has a fantastic tool just for that. Get's it right 90% spot on.

asark

Agree with previous post re Lightroom - it does do a very decent job at fixing the perspective, vertically and horizontally

Tiriel

Wooo hoooo I figured it out with help of course!!

So.. the simplest answer was to simply use the free transform tool (Ctrl A, Ctrl T) and then right click, choose 'skew' and then you can drag corners and midpoints to correct horizontals and verticals as you need to.

That was driving me mad for so so long.

Gehad_JoyRider

Cork_girl wrote: »

Wooo hoooo I figured it out with help of course!!

So.. the simplest answer was to simply use the free transform tool (Ctrl A, Ctrl T) and then right click, choose 'skew' and then you can drag corners and midpoints to correct horizontals and verticals as you need to.

That was driving me mad for so so long.

a little tip for holding on to more of the picture, take the crop tool and widen the over all picture with blank space then, readjust skew that way you don't loose so much of the picture . Being honest the top picture was fine that's just normal lens distortion caused bye shooting wide.

Tiriel

Gehad_JoyRider wrote: »

a little tip for holding on to more of the picture, take the crop tool and widen the over all picture with blank space then, readjust skew that way you don't loose so much of the picture . Being honest the top picture was fine that's just normal lens distortion caused bye shooting wide.

Cheers - it's not just those photos, they were kind of examples - but it happens a lot for me. Straight lines are not my friend