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FORUMS Post Processing, Marketing & Presenting Photos RAW, Post Processing & Printing 
Thread started 14 Apr 2014 (Monday) 09:05
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WIDE ANGLE CORRECTION

 
PEACHMAN
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Apr 14, 2014 09:05 |  #1

I am looking for software to correct wide angle correction on photos I took for advertising a house interior for a realtor. 19-20 sigma lens and the walls are dropping off and angling away to much.. any ideas/thoughts/have used befores?


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nathancarter
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Apr 14, 2014 09:20 |  #2

What software do you already have?
Can you post the image as an example?

Some types of perspective distortion can't be easily "corrected" since that's just the way things are. Things that are farther away will simply be smaller. This leads to the appearance in the photo where straight lines become curved - especially apparent on tile floors, and the top edges of interior walls.

There are many programs that will allow for keystone correction (which is what it sounds like you're describing). For busy interior shots, the results may not always look natural - so be careful. In the future, be mindful of your verticals when you're framing the shot.

http://www.photoshopes​sentials.com/photo-editing/keystoning/ (external link)

You may also be able to use a lens profile to do some corrections, though the lens profile won't fix keystoning or severe perspective distortion.


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Narwhal
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Apr 14, 2014 09:22 |  #3

PhotoShop has a "lens correction" tool under the Filters button.


JIM

  
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tzalman
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Apr 14, 2014 09:35 |  #4

Are the lines straight or is there also barrel distortion from the lens?


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kirkt
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Apr 14, 2014 10:02 |  #5

There are dedicated applications that contain profiles for your camera+lens (for optical distortion) and then there are tools for correcting perspective distortion, like keystoning. DXO makes a plug/standalone called ViewPoint that does this, and will also correct for volume anamorphosis (edges of the image field not retaining their proportions). Photoshop/ACR/LR has lens correction that is profile based, as well as the "upright" tool, which will automagically correct for various perspective distortion (you can also revert to manual control as well). Photoshop also has the Adaptive Wide Angle filter which permits you to straighten and level curved lines that should, in the real world, be straight - distortion caused by wide angle optics.

If you shoot these scenes a lot and post production to achieve your image becomes overly time consuming, this lens is a must

http://www.bhphotovide​o.com …istagon_T_15mm_​f_2_8.html (external link)

- it is expensive, but it is incredibly corrected for distortion, color and contrast.

Kirk


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PhotosGuy
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Apr 14, 2014 10:06 |  #6

nathancarter wrote in post #16832390 (external link)
In the future, be mindful of your verticals when you're framing the shot.
http://www.photoshopes​sentials.com/photo-editing/keystoning/ (external link)

Good advice & link!
Generally, it's best to try to avoid keystoning before you take the shot.
When you're in close with your camera, you would need to keep the camera level, as in keep the back straight up/down. One way to do that for interiors is with a tape measure. Measure the distance of the lens from the floor & then point it at the opposite wall with the center focus point on that same height on the wall.
You might have to shoot a wider angle & then crop in later. Or you could try to shoot from farther away with a telephoto setting.

Failing that, here's another link: Perspective Correction In Photoshop – Repairing Keystoning


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N2bnfunn
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Apr 14, 2014 11:58 |  #7

Narwhal wrote in post #16832401 (external link)
PhotoShop has a "lens correction" tool under the Filters button.

You say it, that is what I was going to say and it working very well, use it in raw option.


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tonylong
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Apr 14, 2014 13:48 |  #8

Peachman, it's pretty important to know what software you are using! There are a few options, but they do require software!

You could also post a sample image!


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Dan ­ Marchant
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Apr 14, 2014 21:41 |  #9

Lightroom/Photoshop lens correction is good but wont fix tombstoning from a wide angle lens. However Lightroom 5 (and I assume the latest version of ACR in Photoshop) has a straighten tool designed specifically for this purpose.

This is an example from a shoot I did recently ....

IMAGE: https://lh3.googleusercontent.com/-PwjmXilnI-A/UxCmjODWSFI/AAAAAAAAGoQ/K51vfdfvvCk/s800/DM852-2013-12-18-5675.jpg

Even better of course is to avoid the issue by using a tilt shift lens. Rented one yesterday and really like it. Sadly I don't think I can justify buying one yet.

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N2bnfunn
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Apr 15, 2014 01:21 |  #10

So does Photoshop CC have that tool.


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tonylong
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Apr 15, 2014 02:52 |  #11

N2bnfunn wrote in post #16834544 (external link)
So does Photoshop CC have that tool.

Note that Dan mentioned the Photoshop Adobe Camera Raw (ACR) plug-in. The CC install of Photoshop should include the latest version of ACR. If you're shooting Raw, ACR will open. If you're not shooting Raw, you would need to open it "explicitely" in Camera Raw via either Bridge or a Photoshop menu item.


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kirkt
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Apr 15, 2014 07:06 |  #12

Even better, PS CC has the Camera Raw filter in the filter menu.

Kirk


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PEACHMAN
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Apr 15, 2014 15:22 as a reply to  @ kirkt's post |  #13

Thank you all for the advise. I had been using PS7 nd not my newer version..Didn't know about that aspect of PS. It works well for what I am doing.. and I am going to look into all the other suggestions tonight! Thanks all!!


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Maxdave
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Apr 17, 2014 07:26 as a reply to  @ PEACHMAN's post |  #14

In Photoshop CC under Filter, Adaptive Wide Angle ... excellent.

Also from Imagetrends, "Fisheye-Hemi" software, about $30, good if your wide angle is really wide ...

http://www.imagetrends​inc.com/products/index​.asp (external link)

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