Author Archives: Alexander Eichhorn

World Opera Production December 2011 in Tromsø

In December 2011 the World Opera in collaboration with University Tromsø, Kulturhuset Tromsø and the Verdione project produced their first 2-site distributed opera performance ‘La Serva Padrona’. The script was based on an opera from the 17th century written by Giovanni Battista Pergolesi. The production explored the space between the spaces, an artform that links multiple performance spaces in realtime through the net.

Art.on.Wires has streamed all three performances live to the Internet. Watch a short time-lapse clip of our preparations and rehearsals below:


Harald Bakkeby Moe – Baritone
Berit Nordbakken Solset – Soprano
Jenny Svensson – Dancer
Bjørn Andor Drage – Keyboard
Yuko Kawami – Violin
Bernt Simen Lund – Cello
Nasra Ali Omar – Drums
Niels W. Lund, General Director
Bjørn Andor Drage, Musical Director
Jason E. Geistweidt, Technical Director
Rakel Nystabakk, Production Manager

Electronic Imaging Paper Accepted: “Characterizing the response of charge-couple device digital color cameras”

The SPIE Electronic Imaging Conference 2012 has accepted a paper written in collaboration between our group and University College Gjøvik. The paper describes part of our work on color calibration for multi-camera arrays. We measured the spectral responses of two otherwise identical Gigabit Industry vision cameras containing a single-chip CCD sensor over a large spectrum of illuminations and exposure times. What we found is that even cameras of the same model and from the same production line exhibit variances in color responses that are significant for multi-view video reconstruction. Based on this observation and our measurements we developed a model to characterise the response of a camera. Assuming the characteristics of all cameras are known, we are able to color-calibrate all images across the entire array.

Abstract—The advance and rapid development of electronic imaging technology has lead the way to production of imaging sensors capable of acquiring good quality digital images with a high resolution. At the same time the cost and size of imaging devices have reduced. This has incited an increasing research interest for techniques that use images obtained by multiple camera arrays. Use of multi-camera arrays is attractive because it allows capturing of multi-view images of dynamic scenes, enabling the creation of novel computer vision and computer graphics applications, as well as next generation video and television systems.

There are additional challenges when using a multi-camera array, however. Due to inconsistencies in the fabrication process of imaging sensors and filters, multi-camera arrays exhibit inter-camera color response variations. For the majority of applications, which use multi-view images obtained from multi-camera arrays, it is insufficient to assume that the different camera’s response can be considered the same without prior verification. Therefore, it is necessary to characterize the response of the different cameras in the array.

Integrated Systems Europe 2011 TradeShow Visit

Last week I visited Amsterdam for the ISE 2011, one of Europes large trade shows for Audio/Video systems. It’s a little unusal for media researchers to go to trade shows, but I thought I’ll give it a try to see what industry is selling nowadays. I also hoped I will get some fresh ideas for one or the other research project, but I was a little disappointed on that. Anyways, here are my personal highlights.

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Art.on.Wires Festival 2010

openFrameworks Workshop

Art.on.Wires FestivalArt.on.Wires is a festival and laboratory space in which creative artists and researchers explore technology for live, interactive and mixed-reality spaces. Art.on.Wires was organised by Alexander Eichhorn, a research scientist at Simula Research Laboratories in Oslo, Norway. It was held as a four-day event from May 10-13 2010 at Kanonhallen, an old industry hall in Oslo.

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The Virtual Choir: Technology, Collaboration and Music

Global Voices published a blog post about a project from composer Eric Whitacre , who formed a virtual choir with 128 participants from around the world via the Internet. Singers get an instruction video, a music track and a video track from the conductor and can record their singing themselfes. Afterwards all voices are mixed into the final production. Although the idea does not use live streaming, it can tell us what others do in order to distribute conductor cues and synchronise individual audio tracks.

FMX 2010 Conference – Animation and Interactive Media

FMX 2010 is the 15th conference on Animation, Games, Effects and Interactve Media. It will be held from May 04 to May 07 in Stuttgart, Germany. The conference is a meeting place for the world’s leading experts in the creation, production and distribution of digital entertainment and interactive visualization. A 6-day pass costs 220 Euro and 105 Euro for students when purchased before April 26. The conference offers some workshops for hands-on experience. See the conference website for topics. This is a perfect opportunity to get in touch with industry partners for potential collaborations! Read more

‘Echo’ from United Visual Artists

UVA/Mimbre Echo Performance

UVA/Mimbre Echo Performance

United Visual Artists in collaboration with the dance group Mimbre made an incredible and beautiful live performance piece called Echo. The performance was first shown in the Turbine Hall, Tate Modern in London in 2006. In November 2009 Echo was performed in the monumental setting of Como’s Teatro Sociale in Italy. The dancers movement was captured using 3-D cameras and then translated in real time to a monumental backdrop creating a simultaneous performance. Here is a Quicktime video of the performance. To learn more about UVA’s work, read the CR blog on UVA and the Light Fantastic and check their website. Read more

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