Hi,
Obviously everybody is using different technique to remove distortion on side. I am interested what use to remove it.
This photo is shot with Canon 24mm Tilt Shift lens and was stitched from 3 images. As you see it has huge distortion on sides bottom and top.
Which tool would help to compress sides towards center?
Thanks,
To that variety of distortions I would try the Warp (edit/Trasform/Warp).
The most common tool is probably Skew, mostly to correct the horizontal vertical lines.
I doubt you will be pleased with the results. You will have to first select each of those regions you have marked (the red/green) make the adjustment, then select 2or three of those regions and adjt to blend. etc. Finally you will then be faced with re-cropping the entire thing.
If this is an important shot, and you have the ability to do so I would suggest you go back to the location, and carefully take three or four (VERTICAL) shots from a panorama set-up, using a 35-50mm lens. Go home, stitch and tweak those...you will be much more pleased with the results.
Problem with vertical is you will get Square shape image when you need panorama. Working with normal lens (not tilt/shift) is risky as photos might not stitch in panorama.
I do panoramas in vertical orientation all the time. In fact it is the recommended way to get best coverage(try George Lepp). If you do say 5 shots in landscape mode you wind up with a very thin long panorama. Whereas if you do say 8-10 shots in portrait mode of the same scene you aspect ratio will more closely resemble a common one and thus frame much more easily. The final aspect ratio is dependent upon the cropping. To actually achieve a square outcome through stitching would take a great deal of effort!
Also since you seem unfamiliar with panoramas I would suggest you also research Brenizer method.
The think that the problem that Isa Aydin refered about not using vertical orientation it's because he is using the TS and he doesn't need/want to shift the camera.
The wider the lens the more distortion even on a tilt shift lens. By stitching, you are making your lens even wider than 24mm. Keep in mind that the further you get from the center of the frame the more parallax distortion. The best options to reduce this kind of distortion are to get as far back as possible and add the 1.4 expander, to crop in, or to make sure that there is nothing towards the frame edge that will show distortion. Chairs start looking funky on the frame edge but windows don't. What is happening is the image is being stretched out gradually as you go farther from center, so in a pinch you can use an edit-transform-scale to fix it but it is an imperfect fix because it can't be applied in a gradual way similar to the optics
I have that lens and love it!
In Photoshop under the Filters menu is the "Lens Correction" filter. After selecting it, choose the "Custom" tab and use the "Geometric Distortion" slider to remove as much distortion as you can from EACH image BEFORE you create your panorama.
Hi Isa,
It all depends on the image I have shot. First I carefully inspect all the edges of the image and then I decide the sequence of the tools to be used (as mentioned below).
In Adobe Photoshop, 'Warp' is a fantastic tool to correct the distortion. However, I use a combination of 'Perspective', 'Warp' & 'Distort' depending on the image. Also depending on the complexity of the image, I set a GRID pattern in Photoshop prior to the correction work.
Thankfully my new Tokina 11-16mm produces less distortion than my earlier Sigma 10-20mm. So my correction work has been reduced drastically. Hope this was helpful.
Move back more, if you can, and crop the image to the size you want.