GIMP Perspective Tutorial

If you take a picture of a building, more often than not, you are at street level. To get the picture content that you want, you have to use a short focal length or wide angle lens, or maybe you are using a phone camera which will give the  same problem, the building appears to lean, it has serious foreshortening.

This can be corrected using GIMP editor 

Open the photo in GIMP and select the PERSPECTIVE tool from the tools menu

Grab the top left corner of the layer and drag to the left until the buildings edge is straight.

Do the same for the right side.

You may find that this changes the left hand side of the image slightly , so if necessary go back to the left and straighten again until the whole image looks right

Lastly click TRANSFORM and the image correction is complete 

The final corrected Image with straightened sides

 

You can now go to the file menu and EXPORT with the filetype you need for your page. PNG is the usual favorite filetype but Jpeg can be useful where minimum filesize is important.

Another frequently used application for the transform tool is for book titles on a perspective surface, check out my tutorial for Book Covers