Straightening images using vertical lines

Discussion in 'Graphics Programs and Photo Gallery' started by Jon_Are, Jun 26, 2009.

  1. Jon_Are

    Jon_Are TPF Noob!

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    When shooting interiors, I have a hard time leveling the image in Photoshop Elements 7. The straightening tool only works, it seems, on the horizontal line; because of issues of perspective in a room, this does not work.

    Is there a way in PSE to straighten verticals? How about in CS4?

    Or a way to overcome this limitation?

    Thanks,

    Jon
     
  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    The proper way would be to use a tilt-shift lens (or a camera with that ability, a view camera for example). That way you could align the film plan with your vertical surface.

    But it shouldn't be too hard to correct in Photoshop. Select the entire image (ctrl-A), then use the free transform tool. Now you can grab the corners of the image and pull them out to make your lines vertical. You will loose some off the edge of the image though.
     
  3. NateS

    NateS TPF Noob!

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    Let's see if I am getting this right....you can straighten the horizontal, but when you do, the vertical is still off?

    If so, then is there a prespective tool in PS? IF not, download Gimp. Gimp has a tool called perspective and you can basically "stretch" the vetical lines to be even with the side of the picture. Example....the picture below is straight on the horizontal but the sides of the building were way off from the vertical of the photo....using the perspective I was able to straighten it....

    [​IMG]
     
  4. Christie Photo

    Christie Photo No longer a newbie, moving up!

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    I do this.... a lot.

    I shoot raw. When I open the image in camera raw, the first thing I do is find a vertilce line very near the center of the image. Then, with the cropping set to 2:3, I use the STRAIGHTEN TOOL to make that line plumb.

    After opening the image in Photoshop, I select the entire image and choose EDIT, TRANSFORM, PERSPECTIVE. I then drag the corner until all lines are plumb.

    Often, I'll then select all, go EDIT, TRANSFORM, DISTORT and use the center adjuster to stretch the image a bit to compensate for the squished results if a lot of perspective correction was necessary.

    -Pete
     
  5. Dwig

    Dwig TPF Noob!

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    That's pretty much my technique though I prefer to drag out some guide lines from the rulers first. I align these with some point on a straight edge in the image for reference.
     
  6. Jon_Are

    Jon_Are TPF Noob!

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    I'm using Photoshop Elements (for now). I'm not sure if this tool is available.

    No, not exactly. PSE has a Straighten Image tool. You click on it, then drag the cursor along a horizontal line; when you let it go, the image tilts so the selected line is level. If you drag the cursor along a vertical line, the image tilts 90 degrees.

    Actually, I shoot RAW as well. And I just discovered that my RAW editor will allow dragging across a vertical line.

    Thanks for all the input.

    Jon
     
  7. KmH

    KmH Helping photographers learn to fish Supporting Member

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    CS4 has a lens correction feature that you don't get with PSE7.

    In addition ACR has several more features available if you use CS4 that you'll never see in PSE7.

    By the way, if you registered your PSE7 you can get a discount when you upgrade to CS4.
     
  8. Jon_Are

    Jon_Are TPF Noob!

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    Actually (I've discovered) PSE7 does have a bunch of lens correction tools: Adjust pincushion & barrel distortion, adjust vignetting, vertical and horizontal perspective adjustments, and edge extension. Pretty cool.

    Thanks, but I have the academic discount available. $199 for CS4.

    Jon
     
  9. KmH

    KmH Helping photographers learn to fish Supporting Member

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    That works, but the Student Edition license prohibits commercial use of the software and you can only load it up on 1 computer. Just sayin'
     
  10. Sachphotography

    Sachphotography TPF Noob!

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    I have Cs3. I and happy with it. I always straighten my pictures lines to be straight. Call me OCD but hey.... LOL I use the ruler tool to get a straight line and then hit CTRL+A and then CTRL+T and use the grid to straighten everything out.
    Elements does not have the ability to do that? If not that sucks..
     
  11. Sachphotography

    Sachphotography TPF Noob!

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    I am always curious to know. How do they know if you use it for anything commercial. Say a private photographer uses it. how do they know? I always wonder.
     
  12. KmH

    KmH Helping photographers learn to fish Supporting Member

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    You're right, a lot of convicted thieves wonder how it is they got caught, because at the time of the theft, they were so sure 'no one would know'.
     

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