Photo Alignment

[FishrOfGrizz]

Not sure if that is the correct name given to this function. My photo needs to be slightly rotated to achieve true vertical. I see there is a rotate command that seems to only rotate in 90 deg increments. Is there a way only slightly rotate an image and maybe an overlay grid to assist in lining up?

Thanks

[rich]

Gimp has a great rotate tool which will align your image.

First do not use the Image -> Transform -> Rotate, use the Rotate tool in the toolbox

Two ways
Click on the rotate tool and you get a dialog box where you can enter an angle
or
Click on the rotate tool
Open the tool settings tab
Under 'direction' select 'Corrective (backward)'
Under 'Preview' select 'image + grid'

Now click in the image and a grid will appear. Align the grid with a vertical (or horizontal)
Click on rotate in the rotate dialog and the adjustment will be made.

A screenshot which might help http://www.imageno.com/af0kqdqaacu6pic.html

Also there is the very first "Meet The Gimp" episode which deals with this. Well worth downloading and watching even though it is a couple of years old now.
http://meetthegimp.org/episode-1-preparing-an-image-for-the-web/

best of luck

[FishrOfGrizz]

Thanks Rich, this is exactly what I was needing.

Have a great day

[rich]

Here is a gimp script which works very much like the straighten tool in PaintShopPro - as I remember it.

Auto Rotate see:

http://registry.gimp.org/node/22910

The image on the site says it all.
Make the line with the paths tool.
Use the Autorotate menu item that the script adds to the layers menu.

[saulgoode]

There is a De-skew plug-in which will automatically straighten many images.

A related Script-fu is also available which would be used to separate and straighten multiple photos in the same image (for example, if you scanned a bunch of post cards).