links // 2007.02.21 08:29:06 [hh]
Foto-Panoramen: einige sehr sehenswerte Projekte
Im Bereich kreativer Panoramas scheint sich derzeit eine ganze Menge zu tun. Screen2.0 stellt einige sehr sehenswerte Projekte mit ungewöhnlichen Projektionen oder extrem feiner Auflösung vor.
Die hier vorgestellten Projekte zeigen vor allem, was softwaretechnisch heute "State of the Art" ist.
Planet "Eiffel": Panoramen als "Wee Planets"
Aus 80 Panoramen im 360-Grad-Rundumblick generiert Alexandre Duret-Lutz sehr beeindruckende runde Panoramen ("Planetoids"), an deren Rändern der Horizont ist. Einige seiner Kreationen finden sich auf flickr in seinem "Wee Planets"-Photoset.
Ein kurzer Text beschreibt, wie er diese Panoramen generiert hat:
"All these pictures are 360° panoramas projected to look like small planets.
The initial panorama is built from many individual pictures with the following tools:
- autopano-sift to create control points,
- hugin to figure out, from the control points, how each picture should be distorted,
- enblend, to stitch the distorted pictures together.
Rob Park's tutorial about the above tools really helped me when I started making panoramas (I have a separate set for "straighter" panoramas).
Converting the panorma into a planet can be done in different ways:
- Dirk Paessler posted a tutorial showing how you can use the "polar coordinates" filter of your photo editor (The Gimp has one)
- Sébastien Perez-Duarte (Seb Przd on Flickr) explored stereographic projections instead, and I find it usually looks far better. Consequently, that's what I've been using too. This can be achieved with the mathmap plug-in for The Gimp. (Do not use the "stereographic projection" that comes with mathmap, it doesn't do what you want. Just work from this formula.)
My camera is a point-and-shoot Sony DSC-T5 (nothing to be proud of) and unfortunately I have no easy way to preserve a constant exposure while shooting a panorama. Sadly I haven't found any way to fix this afterwards, so the different exposures are usually killing my panorama. (Before you suggest aiming at a fixed spot and half pressing the shutter, consider that shooting such panoramas involve spinning yourself while shooting 50-80 pictures...) (EDIT: it's no longuer entirely true, thanks to Seb Przd for pointing me to PTblender for doing color correction, with very varying results.)
I have been shooting handheld until 2006-11-12 at which point I bought a simple tripod without panoramic head. Even though the tripod won't rotate the camera around its nodal point, it still helps to reduce the errors. My brother then offered me a panoramic head which I've been using since 2007-01-01: no more parallax errors.
I'm of course dying to have a decent camera (with lockable exposure) and a wide angle lense, but it's not for anytime soon."
Es lebe die Gigantomanie: Gigapixel-Panoramas mit Spiegelreflex, Tele und Stativ
Ein weiteres interessantes Projekt von Scott Howard bietet Panoramas mit bis zu 1500 Megapixel Auflösung. Generiert werden diese Panoramen mittels unzähliger Tele-Aufnahmen, die dann softwaremäßig (mit
"AutoPano Pro") zu einem riesigen Panorama zusammengesetzt werden.
Eine kleine Auswahl:
Werbung