Image --> Transform --> Rotate

On Mon, Jan 9, 2012 at 2:10 PM, Ronald F. Guilmette wrote:

What is the proper way, using gimp, to correct the orientation of an image?

For example, I just took a shot with one of my cameras where I was holding the camera in a vertical (portrait) orientation. But when I transfer the .JPG to my PeeCee and view it with gimp (or ImageMagick) it is laying over on its sid, in landscape orientation.

To fix this, should I be using Tools->Transform Tools->Rotate or is there a better way? (Actually, I did try doing it that way using gimp, and the results were distinctly unacceptable... some parts of the image got cropped out, and some new transparent parts were added. Bummer. This is not at all what I had in mind.)

Regards, rfg

P.S. Before asking here, I did try googling around for gimp and "orientation" and/or gimp and "rotate" but didn't find anything enlightening. I also checked the Gimp FAQ and again came up empty.

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You'd also have to change Layer Boundary Size. Just go to Layer and the option is near the bottom. That'll fix the image getting cropped.

~ Kasim Sent from my iPod

On Jan 9, 2012, at 4:10 PM, "Ronald F. Guilmette" wrote:

What is the proper way, using gimp, to correct the orientation of an image?

For example, I just took a shot with one of my cameras where I was holding the camera in a vertical (portrait) orientation. But when I transfer the .JPG to my PeeCee and view it with gimp (or ImageMagick) it is laying over on its sid, in landscape orientation.

To fix this, should I be using Tools->Transform Tools->Rotate or is there a better way? (Actually, I did try doing it that way using gimp, and the results were distinctly unacceptable... some parts of the image got cropped out, and some new transparent parts were added. Bummer. This is not at all what I had in mind.)

Regards, rfg

P.S. Before asking here, I did try googling around for gimp and "orientation" and/or gimp and "rotate" but didn't find anything enlightening. I also checked the Gimp FAQ and again came up empty.

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On Mon, Jan 9, 2012 at 4:10 PM, Ronald F. Guilmette wrote:

What is the proper way, using gimp, to correct the orientation of an image?

Image -> Rotate -> XX Clockwise/Counter-clockwise, etc

-- Frank Gore
THE place to talk photography!
www.FriendlyPhotoZone.com

On 01/09/2012 04:10 PM, Ronald F. Guilmette wrote:

What is the proper way, using gimp, to correct the orientation of an image?

For example, I just took a shot with one of my cameras where I was holding the camera in a vertical (portrait) orientation. But when I transfer the .JPG to my PeeCee and view it with gimp (or ImageMagick) it is laying over on its sid, in landscape orientation.

To fix this, should I be using Tools->Transform Tools->Rotate or is there a better way? (Actually, I did try doing it that way using gimp, and the results were distinctly unacceptable... some parts of the image got cropped out, and some new transparent parts were added. Bummer. This is not at all what I had in mind.)

Regards, rfg

P.S. Before asking here, I did try googling around for gimp and "orientation" and/or gimp and "rotate" but didn't find anything enlightening. I also checked the Gimp FAQ and again came up empty.

Ron,

When I started using Gimp, rotation (arbitrary) was a big problem for me.

If you wanting to rotate in 90 degree increments, then use (as others have already posted)

Image, Transform, [and select the operation you want]

That will take care of the problem you are having.

On the other hand if you want to do arbitrary or automatically calculated degrees of rotation, the method you used is correct, HOWEVER, you first must expand the canvas:

a) In some cases you may wish to set the background color. That is in the Toolbox (Windows, Toolbox) ... you can set foreground/background colors and/or reverse them, etc. When you expand the canvas, it will automatically fill with the background color you have specified, thus the potential importance of this step.

b) To expand canvas:

Image, Canvas Size FIRST AT THE BOTTOM IN "Layers: Resize Layers" CHANGE TO "ALL LAYERS" (That is a major Gimp Annoyance.) Then enter your desired new canvas size and then move out of that field for it to take affect.
NOTE that once you have entered the new canvas size but are still in that dialog, you can drag the preview image around in the canvas to put it roughly where you want it.

c) Then do your Tools->Transform Tools->Rotate.

Learning to use the Arbitrary or Automatically Calculated Rotation tool takes some experimentation (at the bottom your Toolbox there should be a variety of options for its behavior). Once you figure it out, it is extremely powerful.

Jay

On 01/09/2012 10:10 PM, Ronald F. Guilmette wrote:

What is the proper way, using gimp, to correct the orientation of an image?

For example, I just took a shot with one of my cameras where I was holding the camera in a vertical (portrait) orientation. But when I transfer the .JPG to my PeeCee and view it with gimp (or ImageMagick) it is laying over on its sid, in landscape orientation.

That must be an old camera... modern cameras have a position sensor and will add a flag in the image file to tell its true orientation (this flag is completely mishandled by the WInXP Image & Fax viewer, but is correctly handled by Gimp).

Attention:

Some slideshow programs use EXIF-data to determine orientation and rotate images automatically. If you only change orientation and leave EXIF-data unaltered the rotated image will be presented in landscape view as before.

I have a liittle perl script here, not only reducing image sizes of multiple images, but also rotating selcected images , determined by a tabbed list. It uses image magick, but it could be modified using perl gimp. The program also uses EXIF-data to set modification date, so a slide show in chronological order is enabled.

Have a lot of fun.

Bernd

Documentation isn't quite ready.

Ronald F. Guilmette schrieb:

In message
, Christen Anderson wrote:

Image --> Transform --> Rotate

Um, yea! That's what I was looking for. (I knew it had to be there somewhere.)

Thanks!

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