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Problem with GIMP Perspective

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Problem with GIMP Perspective bgw 07 Feb 18:42
  Problem with GIMP Perspective Michael Schumacher 07 Feb 19:02
   Problem with GIMP Perspective Toby Haynes 09 Feb 01:23
  Problem with GIMP Perspective Sven Neumann 09 Feb 08:55
bgw
2007-02-07 18:42:31 UTC (over 17 years ago)

Problem with GIMP Perspective

I've been unable to correct a simple keystoning problem witha photo.

I posted a note on LinuxForums.org a few days ago, but received no response, hence this follow-up --

The GIMP perspective transform isn't working for me.

I selected "grid", increased the number of grid lines to 25 to get a bit more precision, selected "backward (corrective)", cubic (best) interpolation,and then in the "Perspective Transform Information" box clicked "Transform".

When I clicked "Transform" on the "Perspective Transform Information" box, NOTHING HAPPENED TO THE IMAGE. I had expected the displayed image to have removed most of the keystoning.

Shear, scale, and all that other stuff works fine.

I'm using Fedora Core 6, and GIMP version 2.2.13. The image is a single layer xcf image, RGB format, 640x480 in size. Anybody know what's wrong?

bgw

Michael Schumacher
2007-02-07 19:02:09 UTC (over 17 years ago)

Problem with GIMP Perspective

Von: bgw

I selected "grid", increased the number of grid lines to 25 to get a bit more precision, selected "backward (corrective)", cubic (best) interpolation,

IMO there's something like

", adjusted the transform frame in the image window "

missing here.

and then in the "Perspective Transform Information" box clicked "Transform".

HTH,
Michael

Toby Haynes
2007-02-09 01:23:52 UTC (over 17 years ago)

Problem with GIMP Perspective

Michael Schumacher wrote:

Von: bgw

I selected "grid", increased the number of grid lines to 25 to get a bit more precision, selected "backward (corrective)", cubic (best) interpolation,

IMO there's something like

", adjusted the transform frame in the image window "

missing here.

If you are trying to make an architectural projection, you might also be interested in Hugin - a application for stitching and mapping photos together.

http://hugin.sourceforge.net/

And this is a good tutorial for making an architectural projection.

http://hugin.sourceforge.net/tutorials/architectural/en.shtml

Cheers, Toby Haynes

Sven Neumann
2007-02-09 08:55:11 UTC (over 17 years ago)

Problem with GIMP Perspective

Hi,

On Wed, 2007-02-07 at 09:42 -0800, bgw wrote:

The GIMP perspective transform isn't working for me.

Let me guess. You have set the Mode to "Selection" in the tool options?

Sven