Thu Aug 05, 2021 12:47 am
Thu Aug 05, 2021 2:03 am
Thu Aug 05, 2021 2:14 am
Thu Aug 05, 2021 2:46 am
Thu Aug 05, 2021 3:38 am
Apuleius wrote:GIMP Version: 2.8.14
Operating System: Linux
GIMP Experience: Basic Level
I have been trying to rectify a photo with skyscrapers on both sides of the middle.
a photo including skyscrapers converging at the top of the photo
1. I put a grid over the photo.
2. I adjust the grid from 10 default to 150
3. I place the perspective tool at the top left corner to pull that side out so a vertical edge lines up with a vertical grid line. I left click
4. I place the perspective tool at the top right corner and pull outward to line a vertical on that side up with a vertical grid line.
But this pulls the left side over to the right. So the building edges cannot be rectified.
Is there any way to stop one side from being pulled over?
any suggestions solving this would be appreciated.
Thu Aug 05, 2021 4:18 am
Thu Aug 05, 2021 5:11 am
PixLab wrote:You can transform/distort any selection as well, for example select only the building ou the part of the image you want straightened, then use your preferred transform tool
Sat Aug 07, 2021 10:01 pm
ofnuts wrote:Apuleius wrote:GIMP Version: 2.8.14
....
As you can see in many case applying the exact correction (verticals are truly vertical above) make the perspective almost inverted (possibly because we are used to see these things from below). This could be worse for skyscrapers, depending on how far the shot is taken.
Sat Aug 07, 2021 10:20 pm
ofnuts wrote:Apuleius wrote:GIMP Version: 2.8.14
....
As you can see in many case applying the exact correction (verticals are truly vertical above) make the perspective almost inverted (possibly because we are used to see these things from below). This could be worse for skyscrapers, depending on how far the shot is taken.
Sat Aug 07, 2021 10:59 pm
dinasset wrote:A complex picture to adjust in perspective:
-original
....
-show grid, then activate perspective, then move corner as needed
....
-crop as needed
....
Sat Aug 07, 2021 11:45 pm
Apuleius wrote:
Sun Aug 08, 2021 1:49 am
ofnuts wrote:PixLab wrote:You can transform/distort any selection as well, for example select only the building ou the part of the image you want straightened, then use your preferred transform tool
How do you handle the joints between the unchanged parts and the fixed parts is left as an exercise for the reader
Sun Aug 08, 2021 2:00 am
Apuleius wrote:ofnuts wrote:Apuleius wrote:GIMP Version: 2.8.14
....
As you can see in many case applying the exact correction (verticals are truly vertical above) make the perspective almost inverted (possibly because we are used to see these things from below). This could be worse for skyscrapers, depending on how far the shot is taken.
this is an interesting method.
you don't use the grid from view>grid, but from the perspective tool settings themselves.
problem here is that it opens up the sky so much it loses the feel of hong kong and it fattens up the people on street level.
Thu Sep 09, 2021 9:12 am
PixLab wrote:ofnuts wrote:PixLab wrote:You can transform/distort any selection as well, for example select only the building ou the part of the image you want straightened, then use your preferred transform tool