TY  - RPRT
A1  - Wetzstein, Gordon
A1  - Bimber, Oliver
T1  - Radiometric Compensation through Inverse Light Transport
N2  - Radiometric compensation techniques allow seamless projections onto complex everyday surfaces. Implemented with projector-camera systems they support the presentation of visual content in situations where projection-optimized screens are not available or not desired - as in museums, historic sites, air-plane cabins, or stage performances. We propose a novel approach that employs the full light transport between a projector and a camera to account for many illumination aspects, such as interreflections, refractions and defocus. Precomputing the inverse light transport in combination with an efficient implementation on the GPU makes the real-time compensation of captured local and global light modulations possible.
KW  - Association for Computing Machinery / Special Interest Group on Graphics
KW  - CGI <Computergraphik>
KW  - Maschinelles Sehen
KW  - Projektionssystem
KW  - radiometrische Kompensation
KW  - Licht Transport
KW  - Projector-Camera Systems
KW  - Radiometric Compensation
KW  - Inverse Light Transport
Y1  - 2007
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-8126
ER  - 
TY  - RPRT
A1  - Bruns, Erich
A1  - Brombach, Benjamin
A1  - Zeidler, Thomas
A1  - Bimber, Oliver
T1  - Enabling Mobile Phones To Support Large-Scale Museum Guidance
N2  - We present a museum guidance system called PhoneGuide that uses widespread camera equipped mobile phones for on-device object recognition in combination with pervasive tracking. It provides additional location- and object-aware multimedia content to museum visitors, and is scalable to cover a large number of museum objects.
KW  - Objektverfolgung
KW  - Neuronales Netz
KW  - Handy
KW  - Objekterkennung
KW  - Museum
KW  - mobile phones
KW  - object recognition
KW  - neural networks
KW  - museum guidance
KW  - pervasive tracking
Y1  - 2005
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-6777
ER  - 
TY  - RPRT
A1  - Föckler, Paul
A1  - Zeidler, Thomas
A1  - Bimber, Oliver
T1  - PhoneGuide: Museum Guidance Supported by On-Device Object Recognition on Mobile Phones
N2  - We present PhoneGuide – an enhanced museum guidance approach that uses camera-equipped mobile phones and on-device object recognition. Our main technical achievement is a simple and light-weight object recognition approach that is realized with single-layer perceptron neuronal networks. In contrast to related systems which perform computational intensive image processing tasks on remote servers, our intention is to carry out all computations directly on the phone. This ensures little or even no network traffic and consequently decreases cost for online times. Our laboratory experiments and field surveys have shown that photographed museum exhibits can be recognized with a probability of over 90%. We have evaluated different feature sets to optimize the recognition rate and performance. Our experiments revealed that normalized color features are most effective for our method. Choosing such a feature set allows recognizing an object below one second on up-to-date phones. The amount of data that is required for differentiating 50 objects from multiple perspectives is less than 6KBytes.
KW  - Neuronales Netz
KW  - Objekterkennung
KW  - Handy
KW  - Museum
KW  - Mobile phones
KW  - object recognition
KW  - neural networks
KW  - museum guidance
Y1  - 2005
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-6500
ER  -