Spherical pano stitched from sweep panoramas, an experiment

This post also deals with the answer to Huck’s question whether it is possible to make a full spherical panorama from sweep panoramas made with the Sony NEX-5:

The camera can pan vertically 185 degrees. It can catch the nadir and zenith. It would have more than 45 degrees horizontally so about 5 shots should get you everything. If these could be stitched you could have a spherical panorama with 5 shots. Have you ever tried this? Do you know if it could be done?

As an introduction to the subject please read my answers to Huck’s question here before you continue.

Sweep Pano Head Setup

I mounted the camera on a weird looking panorama head. The setup may not have been perfect in the NPP, but good enough because there were no objects near the setup. I switched the camera to the panorama mode “Vertical Up” in “Wide” mode. One resulting sweep panorama has 2160×5536 pixels. To get enough overlap I took eight of them, starting from the bottom to the top. I locked the exposure for every stripe around the horizon by pressing down the shutter half way. The finished panorama was about 12000×6000 pixels in size.

Here is the best result I could achieve with the source material. You find my PTGui project for the panorama for starting your own stitching experiments here.


Geotag Icon Show on map

The result may not look that bad at first sight, but when looking closer you will see heavy distorted parts (due to the really weird a, b and c parameters from the optimizer) and moving poeple cut in parts:

To make a long story short: The poor result does not warrant the huge effort!

I got a much better result taking individual shots from the panorama head. With the 16mm pancake lens in portrait mode you can make a complete sphere with a final size of about 20000×10000 pixel: You need three rows: 6 shots tilted 60° up, 8 shots at the horizon and again 6 shots tilted 50° down. This closes the hole at the zenith and leaves one at the nadir. However this can easily be fixed by removing the tripod and making a down shot using the view point correction technique described here or here.

When you download the sample sweep panoramas and try it for yourself, please let me know when you were able to stitch a better result from the source material. And what’s most important: Try to describe the process in detail! 

Related Posts
From the 85m high tower of Munich's town hall you have a great view over the city centre. When you're lucky you can even see the Bavarian alps in the distance. The tower can easily be ascend via elevator.


READ MORE
Bad Hindelang with Tilt-Shift effects
See some experiments with the Lensbaby Tilt Transformer on the Sony NEX 5 using the Lensbaby Composer Focus Front and two differnet Nikon lenses.


READ MORE
This year we started with a photographic experiment. We recruited two assistants and used sparklers to write 2012 in the air.


READ MORE
Experiments with creating a cinemagraph.

Experimenting With a Cinemagraph
READ MORE
The Novoflex NEX/NIK adapter makes it possible to mount Nikon lenses on the Sony NEX camera line.

Nikon Nikkor 20mm f/2.8 AI-s on a Novoflex NEX/NIK Adapter
READ MORE
A cylindrical panoramic image taken with the NEX-5 and the SEL55210 lens from Sony.

View over Bad Oberdorf and Bad Hindelang
READ MORE
This panorama is a tribute to Joseph von Fraunhofer (* March 6, 1787 – † June 7, 1826) a German physicist and optician. He was born in Straubing and died in Munich. This panorama shows his tomb in Munich.


READ MORE
White Easter in Bad Hindelang.


READ MORE
The Lensbaby Tilt Transformer makes it possible to mount Nikon lenses on the Sony NEX camera line.

Nikon 24mm/F2.8 and Lensbaby Tilt Transformer
READ MORE
There is no excerpt because this is a protected post.
READ MORE
Munich Town Hall Tower North East Corner
Bad Hindelang with Tilt-Shift effects
Happy new year 2012
Experimenting With a Cinemagraph
Nikon Nikkor 20mm f/2.8 AI-s and Novoflex NEX/NIK
View over Bad Oberdorf and Bad Hindelang
At Joseph Fraunhofer’s Tomb
White Easter in Bad Hindelang
Nikon Nikkor 24mm f/2.8 AI and Lensbaby Tilt
Protected: Open Monday im Hackerspace-FFM

Author: PanoTwin Markus

PanoTwin Markus → My Google+ Profile

2 thoughts on “Spherical pano stitched from sweep panoramas, an experiment”

  1. Watching the panorama made me laugh. If I didn’t know the panorama was distorted I would have thought these were some strange (and maybe even creative) buildings.

Comments are closed.