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Camera moving on a linear axis

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Gregg Childs
Posted on Thursday, May 30, 2002 - 5:20 pm:   Edit PostDelete Post

Normally, a panorama is generated by stitching together pictures taken where the camera stays in one spot and is rotated about an axis (usually vertical axis). What if I am walking along a linear axis (or flying smoothly in a straight line) and have the camera pointing straight and not changing its alignment; can a panorama be generated from this series of pictures? If so, this would probably eliminate the "bulging effect" that is evident in most panoramas?
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John Strait
Posted on Monday, June 03, 2002 - 9:00 am:   Edit PostDelete Post

I have seen discussion on the web about making this type of panorama, but I'm not sure whether there are any reliable techniques. The problem is parallax. Because the camera is moved between shots, there is no way to eliminate all of the parallax differences. This will make it impossible to remove all ghosting artifacts. You'll find this is true regardless of what stitching software you use.

My advice to get the best result would be to (1) turn off the image warping and (2) turn off the alignment fine tuning. To turn off image warping, select "Swing lens or rotational camera" for the type of camera. This will disable the choice for focal length--focal length is not significant except for the image warping. You can turn off alignment fine tuning with a checkbox on Wizard Step 3 or on the Alignment properties dialog.

Image warping is designed to correct images that are taken from the same point by rotating the camera between images. Turning off the warp should give you the best result.

The alignment fine tuning will be confused by the parallax differences. So I recommend turning this off too, although you might want to experiment a little. You might find it worthwhile to try manual fine tuning (see Fine tune the stitched image).

You'll probably find that it is important to keep the camera level and in the same plane. That is, rotation of the camera between one shot and the next is likely to cause problems. And it's also probably important to move in a perfectly straight line. Otherwise there will be scale changes from one picture to the next that the software will not be able to correct.
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A Jordan
New member
Username: Ixlatall

Post Number: 4
Registered: 9-2005
Posted on Tuesday, October 31, 2006 - 4:11 pm:   Edit PostDelete Post

With this discussion in mind, I just shot a pano from a revolving restaurant (like the space needle) that has not revolved in years (broken). I moved the camera location from window pane to window pane (about 27 total) and shot each window from the same distance on a tripod. I have the latest version of PF (v4). Is there new technology that will allow me to stitch these photos together?


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