Automating Joiners
(or Organized Memories)

Lihi Zelnik-Manor     and        Pietro Perona


Abstract
A single picture cannot always capture the full scene. It has thus become common among artists and amateur photographers to take multiple pictures of the same scene and compose them into image joiners (a term coined by artist David Hockney). Typically, these joiners are constructed by manually positioning and layering the images on a (digital) 2D canvas using software tools like Photoshop. This results in a fragmanted composition of images, where some images occlude others and boundaries across pictures are fully visible. In spite (or maybe due to) their fragmanted look, such representations are attracting a lot of attention and numerous examples are posted online in webpages such as Flickr (taged with joiners, Hockney, photocollage, etc.)

We are interested in automating the construction of such image joiners for two main objectives. The first is providing photgraphers with a good starting point from which they can more easily finalize their joiners. The second is providing a new way for exploring image collections now organized in correspondence with the underlying scene rather than by file names.



Paper
L. Zelnik-Manor and P. Perona, "Automating Joiners", To appear in NPAR 2007. (PDF)


Slides
Slides of a presentation given at Dick Lyon's photography course







Some Examples of our automatically generated joiners

Cacti Garden

Cacti

Arch

Arch
Pond

Pond
Anza-Borrego

Anza
Long Beach Airport

Long Beach Airport
Uccello
 Uccello reconstruction
Tractor

Tractor
Truck

Truck

Southewest

Southwest
Mickael McMillen

McMillen
Stav Zelnik

Stav


Some Examples of semi-automatic joiners
Between 2 and 4 point correspondences had to be provided manually. The rest (i.e., alignment and layering of images) was done automatically.

Family

Family
Bill Freeman

Bill
Impossible Bridge

Japanese Bridge


Homage to David Hockney's LA Visitors series
Between 4 and 6 point correspondences had to be provided manually. The rest (i.e., alignment and layering of images) was done automatically.

Francois Fleuret

Francois
Marco Ponti

Marco Ponti
Patrick Hughes

Patrick Hughes





Organized Memories
A more intuitive way for browsing image collections     Preliminary demo


Related Links
A similar approach has been developed in parallel by Yoshikuni Nomura, Li Zhang and Shree Nayar


Our previous work  on "squaring the circle in panoramas".




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