RESEARCH

Claus B. Madsen, Ph.D.
Computer Vision and Media Technology Lab
Aalborg University

Papers linked here are without publication detail. For more precise information about the puplications, please refer to my publication list (bio, CV, and publication list)

Augmented Reality

Estimating outdoor daylight parameters from a single image using knowledge of date, time, and location on Earth GRAPP 2008 PAPER	Real-time glossy surface visualization based on fitting parametric reflected radiance functions to images acquired from a multitude of viewpoints under constant illumination GRAPP 2008 PAPER VIDEO	Comparing the performance of two techniques for approximating an environment map with directional light sources. How many sources are needed to achieve a certain accuracy? SCIA 2007 PAPER

A scalable approach to rendering photorealistic augmented reality in real-time including shadows and interactions between real and virtual shadows GRAPP 2007 PAPER VIDEO1 VIDEO2	A linear approach to determining the illumination (sky and sun contributions) in outdoor daylight scenes. ICPR 2006 PAPER	An AR system rendering objects into scenes with image-based lighting but adaptive to the illumination conditions of the scene GRAPP 2006 PAPER VIDEO

A study showing that it is possible to influence the manner in which test subjects explore a virtual space by using visual augmentation PRESENCE 2005 PAPER POSTER	A technique for relighting a single image to simulate the appearance of a scene under arbitrary illumination VVG 2005 PAPER VIDEO	A non-linear optimization technique for finding the directions and power of directional light sources to approximate an HDR environment map for real-time rendering with natural light EUROGRAPHICS 2003 PAPER

A small story about the importance of shadows in augmented reality PRESENCE 2003 PAPER VIDEO	Automatic shadow detection in images and how to use this information to determine appearance of virtual shadows SCIA 2003 PAPER

Image-Based Rendering

Real-time glossy surface visualization based on fitting parametric reflected radiance functions to images acquired from a multitude of viewpoints under constant illumination GRAPP 2008 PAPER VIDEO	A technique for relighting a single image to simulate the appearance of a scene under arbitrary illumination VVG 2005 PAPER VIDEO	BENOGO. EU funded project on real-time Image-Based Rendering. www.benogo.dk VIDEO

Autonomous Agents

PUPPET. EU funded project on making a dramaturgically based computer game for children aged 4 to 8. This paper focuses on the technology designed to support various child interaction. Book chapter, Springer 2003 PAPER VIDEO	PUPPET. This paper describes work in the field of autonomous agent perception and action selection. Book chapter, Springer 2000 PAPER VIDEO	Bouncy is a small interactive character that reacts to user voice and gesture input in a very simple, entertaining manner Technical report PAPER VIDEO

Computer Vision

	Combining real-time stereo imaging with chromaticity analysis to detect dynamic shadows DYNAMIC 3D IMAGING 2009 PAPER INPUT VIDEO DETECTED SHADOWS VIDEO

Graph cut based shadow segmentation and removal from single images. Especially taking soft shadows (penumbra regions) into account. SCIA 2007 PAPER	A daylight model taking umbra, penumbra and sunlight into account for automated shadow removal. MIRAGE 2007 PAPER	Automatic shadow detection in images and how to use this information to determine appearance of virtual shadows SCIA 2003 PAPER

Analysis of the noise sensitivity of robot self-localization based on triangulation of visual landmarks ROBOTICS AND AUTOMATION 1998 PAPER	PCA based recognition of the hand alphabet SCIA 1997 PAPER	Analysis of the noise sensitivity of pose estimation based on tri-hedral vertices MACHINE VISION AND APPLICATIONS 1997 PAPER

What is the probability of the true angle of a two legged junction? IEEE T-PAMI 1997 PAPER	What is the stability of length and orientation of an edge segment? Selected papers from SCIA 1995 Springer PAPER