![pano2vr-player pano2vr-player](https://alisofts.net/wp-content/uploads/2019/10/2233-42-300x165.jpg)
This can be a simple as copying CPs from the left sphere to the right one, and vice-versa - unfortunately not easy to do with present stitching software. In this case the panohead should be stable enough that you can use the same roll and pitch settings for all views.Ī third approach is to combine control points from both cameras, in such a way that the parallax errors largely “average out”, giving a reasonable approximation to an alignment at infinity. It will have to be above or below the main pair of cameras, and is used only for horizontal alignment. A better scheme is to use 3 cameras, with the center one on-nodal. This has the disadvantage that the parallax errors in the other sphere will now be twice as big. With a two camera rig, mount one camera with its npp on the rotation axis. This method achieves the ideal of aligning the images “at infinity”, which is to say, at the true pointing directions of the cameras.Other methods rely on control points and are therefore subject to errors due to the perspective changes between photos.Ī reliable way to make a template from control points is to take one sphere “on-nodal” so that there is no alignment error due to parallax. One way is to use a high precision pano head that can reposition the cameras with an error of less than a pixel, and simply give the stitcher those preset angles. There are several ways to make such a template. So one needs to use the same yaw, pitch and roll angles for both spheres. Once rectified, he left and right images of each stereo pair must be aligned the same any variation will lead to incorrect stereo views. This is actually a more appropriate correction than pitch, in many cases.
![pano2vr-player pano2vr-player](https://static.filehorse.com/screenshots/imaging-and-digital-photo/pano2vr-screenshot-01.png)
Another very useful trick is to adjust the vertical lens shift parameter to reduce vertical parallax between left and right spheres. It is possible in PTGui to “lock” the pitch or roll angles, making them the same for all images, and this can be used to correct alignment errors. Camera alignment errors are a bit harder to correct in the stitcher, so it is best to align the cameras on the rig very carefully. The best approach for stereo panography is to calibrate each camera by stitching a 360 degree series, shot on-nodal with plenty of overlap, and use those calibrations for stitching the spheres. Stereo Photo Maker is good for rectifying normal images but not so good for fish-eye images. First of all, any difference between the lenses or the pointing directions of the cameras must be corrected, a process known as “rectifying” a stereo pair. This is often called the “cha-cha” method because of the sideways shift.Ī stereo panorama must faithfully represent the left-eye and right-eye points of view.
Pano2vr player series#
For the “few views” method, two series of photos are taken with the camera shifted sideways + or - 35 mm from the normal centered position, and each series is stitched to one sphere. Left and right spheres are stitched from narrow strips selected from the right and left sides respectively of the images. For the “many views” method, the camera is mounted with the pivot axis 35 - 50 mm behind the pupil of a wide fish-eye lens, and a single series of images is taken. Moving subjects can be handled by masking, as in normal panography.īoth methods have single-camera variants, that need a truly static subject because the left and right views are taken at different times. Take a small number of stereo views, as for a regular panorama, and hide the errors by careful composition and masking. This method is very reliable but has problems with moving subjects. If they are narrow enough, the errors between adjacent strips will be too small to see. Then the panorama contains just a narrow vertical strip from each photo. Take a large number of closely spaced stereo views. There are two basic ways to handle this problem: But such photos will not easily stitch to two seamless spheres, because each series was taken from a moving viewpoint, not from a single fixed point as assumed by standard stitching software. The most obvious way to make a stereo panorama is to stitch together a series of stereo photos, taken by turning a pair of cameras.