Correcting the horizon line, straightening ...help

Discussion in 'Graphics Programs and Photo Gallery' started by MostlyDigital, Mar 20, 2005.

  1. MostlyDigital

    MostlyDigital TPF Noob!

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    How do I correct the horizon line in a picture? (make the picture look like its level, and straight) Do I move the whole picture till the horizon is straight? If so how is this done? I tried to figure it out and I searched the internet but found nada. Please help, thanks :)
     
  2. SWFLA1

    SWFLA1 TPF Noob!

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    use the rotate command - mine usually needs rotated by 1 degree... you can experiment and see what you're norm is....
     
  3. tempra

    tempra TPF Noob!

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    If you are using photoshop, it's probably easier to duplicate the layer - drag the background layer down to the new layer icon in the layers palette, then ctrl + t right click and choose rotate, then rotate your pic until it's straight.

    You'll then need to crop out the empty parts of the pic so that you don't have weird looking edges.
     
  4. photobug

    photobug TPF Noob!

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    If you're using PS you can right click the eye dropper in the toolbar and select the measure tool. Start at one end of the horizon and draw a line to the other end.

    Go to Image|Rotate|Arbitrary and the image will automagically align itself properly (assuming you drew the line correctly).

    Alternately, if you can lay a grid over your pic you can rotate it manually by trial and error.

    In either case you need to crop the image after rotating it.
     
  5. Kent Frost

    Kent Frost TPF Noob!

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    This is how I typically do it:

    1. Open the image.
    2. Type F to go to the view where you can have some room to play with the image.
    3. Select the entire image with the marquee tool or by typing CTRL+A.
    4. Go to EDIT, then TRANSFORM, then ROTATE. You will see the box appear around the image.
    5. Using the mouse, place the cursor near one of the corners and rotate the image until it is as straight as you'd prefer.
    6. At this point, you'll notice that the corners of the image will have slivers of triangles of whatever the background color is. To eliminate that, zoom in to one of the corners and select the part of the image that does not include those slivers.
    7. Go to IMAGE, then CROP.
    8. (Optional) If you'd like to make the image the same size as it was, go to IMAGE, then IMAGE SIZE, and resize.
     
  6. Big Mike

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

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    I turn on the grid so that I have straight lines for reference, then rotate the image.
     
  7. Digital Matt

    Digital Matt alter ego: Analog Matt

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    I use the measure tool and let photoshop do it for me. Be aware that you will probably have some barrel distortion.
     
  8. mentos_007

    mentos_007 The Freshmaker!

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    hmm I rotate my head... then the pic is straight :)
     
  9. MostlyDigital

    MostlyDigital TPF Noob!

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    Thanks alot, got it :)
     
  10. Bob Fiske

    Bob Fiske TPF Noob!

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    Another way is to select the entire image with the crop tool, rotate from a corner until the horizon is straight, crop, select the whole image again, and move each side in individually until past the exposed canvas and crop again. This method is not precise with the second crop because the borders of the crop selection don't move in tiny increments but this method is quick and easy and good enough for most shots. Of course, with PS there are always 10 right ways to do anything!
     

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