Issue VI


Computer Vision

Volume: 2010, Issue No. 6

Date: December 2010

Guest Editors: Dídac López-Viñas, Marc Bigas-Bach, Viktu Pons-Colomer and László Szirmay-Kalos

Contents: Download the full issue here

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In this issue 


The papers included in this section cover a variety of topics related to the theme of imaging. This field has progressed greatly in recent times due to the rapid growth of the 3D virtual world, where the future of 3D digital entertainment, health, security, industry, etc. is quite promising. With papers describing the techniques involved with computer game animation to improving the methods involved with seabed imaging, this section of CEPIS UPGRADE also includes an interview about 3D technologies with Steve Schklair, the founder and CEO of 3ality Digital. Download

UPgrade European NETwork

This section features a paper by Akos Rona-Tas and Stefanie Hiß that analyses the consumer and corporate credit ratings and their role in the subprime crisis. The paper was first published, in German, by Informatik-Spektrum, a journal published by the CEPIS Member societies, Gesellschaft für Informatik (GI) from Germany and the Swiss Informatics Society (SI). This paper describes how both consumer and corporate credit ratings played a role in the U.S. subprime mortgage crisis. Download

Learn about the 45th CEPIS Council meeting that was held in Brussels, Belgium in November 2010 during which new members were elected to the Executive Committee. An exclusive interview with the CEPIS Women in ICT Award Winner is included along with information about the new CEPIS Working Groups, active in areas such as Green ICT, Professionalism, and the Data Privacy Initiative by the Austrian CEPIS Member Society OCG. This section includes information about the latest initiatives from the European Commission relating to the EU2020 strategy, the "New Skills for New Jobs" initiative and how €780 million has just been allocated for strategic ICT research in Europe. Download



Computer Vision

This introduction written by all four guest editors describes how the theme for the monograph was decided upon around the topic of imaging and the revolutionary effect that 3D technology continues to have in this field. Also the mini-biographies of each of the four guest editors of this issue of CEPIS UPGRADE are included. Download

GPU-based Ambient Occlusion and Indirect Illumination

This paper describes the technique for computing diffused light transfer and shows how it can be used to compute global illumination for animated scenes in computer games and real-time systems which require realistic representation of images at high frame rates. The technique is efficient enough when implemented on a fast GPU (Graphic Processing Unit) to calculate ambient occlusion and indirect lighting data on the fly for each rendered frame. It does not have the limitations of pre-computed radiance transfer (PRT) or pre-computed ambient occlusion techniques, which are limited to rigid objects that do not move relative to one another. Here we present a simplified illumination model which is derived from the rendering equation and develop computation algorithms that can be efficiently executed by the GPU. The model consists of two parts, the ambient occlusion part describing the influence of the far part of the scene, and the indirect illumination part, which is responsible for local interactions. Both parts are directional integrals, and we discuss and compare different alternatives for their accurate estimation. Download

Three-Dimensional Perception, Measuring Reality

This paper is about developing techniques that enable a machine to recognize and interact with its environment. Humans use two eyes to perceive three dimensions. Similarly, we use digital cameras to perceive and program algorithms that attempt to emulate the human brain in order to recognize and measure the reality that surrounds us. Download

Technologies for 3D: Looking at the Future: Interview with Steve Schklair

3D technologies have been booming recently and they are already an alternative presence at home, movie theatres, etc. These developments are commented on in an in-depth interview with an outstanding 3D expert and entrepreneur, Steve Schklair, founder and CEO of 3ality Digital, a company based in Burbank, California, USA, specialized in advanced technologies for digital stereoscopics. Download

Non-Photorealistic Rendering for Motion Picture Production

A critical problem of movie rendering is that while frames are calculated independently, the image sequence should not present flickering or inconsistency. A piece of curve must be consistent with the 3D geometry and move and deform with the object. On the other hand, it must also be consistent with the 2D image since in the traditional drawing process the artist draws in 2D. Hand drawn lines are roughly independent of the distance of the object from the viewer since rendering happens directly on the paper. Finally, manual drawing involves a great deal of randomness - the artist is not able to draw the same line twice. Being synchronized in both object and also in image spaces seems to be contradicting requirements. The rendering process should resolve this contradiction while presenting the natural randomness inherent in manual work. This paper presented an NPR (Non-Photorealistic Rendering) system and its application in the movie rendering pipeline. Our system implements three NPR effects: contouring, hatching, and painterly rendering. The algorithms that have been developed guarantee that these effects remain consistent with the animation and the deformation of the 3D geometry, avoid flickering, while still maintaining the look of hand drawn images. This project also proves that NPR effects can be made flexible enough to allow the artist to express his/her own ideas and produce images meeting his/her expectations. Download

On Creativity and Multimedia: "Serious Games"

Memorable experiences intend to deliver intense usable moments with the support of different platforms and social networks. Higher degrees of motivation ensure efficiency and performance. "Serious Games" deliver powerful and truthful experiences on the basis of providing the user with goals, challenges, problem-solving and rules, along with a clear internal value and an interactive experience. Our software and hardware-based tools should have the power to teach and change us, while making us better problem-solvers and professionals. This article intends to educate on Serious Games and Entertainment Technologies as a strategic source of developments that can be applied to very diverse fields such as Sports, Education, Tourism, Physical Therapy, Medicine, Entertainment, Culture, Historical Heritage Recovery and Marketing, amongst others. Download

20,000 Photographs Under the Sea

Positioning oneself underwater is a difficult task which was never really resolved. Now, researchers from the Universitat de Girona, Spain, found a solution to the problem based on the interpretation of seabed images. Moreover, this technique also opened new doors for biologists and geologists studying the seabed. Download