The optical properties available for an object are most often fragmented and insufficient for photorealistic rendering of the object. We propose a procedure for digitizing a translucent object with sufficient information for predictive rendering of its appearance. Based on object material descriptions, we compute optical properties and validate or adjust this object appearance model based on comparison of simulation with spectrophotometric measurements of the bidirectional scattering-surface reflectance distribution function (BSSRDF). To ease this type of comparison, we provide an efficient simulation tool that computes the BSSRDF for a particular light-view configuration. Even with just a few configurations, the localized lighting in BSSRDF measurements is useful for assessing the appropriateness of computed or otherwise acquired optical properties. To validate an object appearance model in a more common lighting environment, we render the appearance of the obtained digital twin and assess the photorealism of our renderings through pixel-by-pixel comparison with photographs of the physical object.
Multi-modal deep learning for joint prediction of otitis media and diagnostic difficulty
Josefine Vilsbøll Sundgaard, Morten Rieger Hannemose, Søren Laugesen, Peter Bray, James Harte, Yosuke Kamide, Chiemi Tanaka, Rasmus R. Paulsen, and Anders Nymark Christensen
Laryngoscope Investigative Otolaryngology, Oct 2024
Video-based Skill Assessment for Golf: Estimating Golf Handicap
Christian Keilstrup Ingwersen, Artur Xarles Esparraguera, Albert Clapés, Meysam Madadi, Janus Nørtoft Jensen, Morten Rieger Hannemose, Anders Bjorholm Dahl, and Sergio Escalera
In Proceedings of the 6th International ACM Workshop on Multimedia Content Analysis in Sports, Oct 2023
Multi-modal data generation with a deep metric variational autoencoder
Josefine V. Sundgaard, Morten R. Hannemose, Søren Laugesen, Peter Bray, James Harte, Yosuke Kamide, Chiemi Tanaka, Rasmus R. Paulsen, and Anders N. Christensen
In Proceedings of the Northern Lights Deep Learning Workshop, Oct 2023
Generalizability and usefulness of artificial intelligence for skin cancer diagnostics: An algorithm validation study
Niels K. Ternov, Anders N. Christensen, Peter J. T. Kampen, Gustav Als, Tine Vestergaard, Lars Konge, Martin Tolsgaard, Lisbet R. Hölmich, Pascale Guitera, Annette H. Chakera, and Morten R. Hannemose
Artificial intelligence can be trained to outperform dermatologists in image-based skin cancer diagnostics. However, the networks’ sensitivity to biases and overfitting may hamper their clinical applicability. Objectives The aim of this study was to explain the potential consequences of implementing convolutional neural networks for stand-alone melanoma diagnostics and skin lesion triage. Methods In this algorithm validation study on retrospective data, we reproduced and evaluated the performance of state-of-the-art artificial intelligence (convolutional neural networks) for skin cancer diagnostics. The networks were trained on 25,331 annotated dermoscopic skin lesion images from an open-source data set (ISIC-2019) and tested using a novel data set (AISC-2021) consisting of 26,591 annotated dermoscopic skin lesion images. We tested the trained algorithms’ ability to generalize to new data and their diagnostic performance in two simulations (melanoma diagnostics and skin lesion triage). Results The trained algorithms performed significantly less accurate diagnostics on images of nevi, melanomas and actinic keratoses from the AISC-2021 data set than the ISIC-2019 data set (p < 0.003). Almost one-third (31.1%) of the melanomas were misclassified during the melanoma diagnostics simulation, irrespective of their Breslow thickness. Furthermore, the algorithms marked 92.7% of the lesions ‘suspicious’ during the triage simulation, which yielded a triage sensitivity and specificity of 99.7% and 8.2%, respectively. Conclusions Although state-of-the-art artificial intelligence outperforms dermatologists on image-based skin lesion classification within an artificial setting, additional data and technological advances are needed before clinical implementation.
Was that so Hard? Estimating Human Classification Difficulty
Morten Rieger Hannemose*, Josefine Vilsbøll Sundgaard*, Niels Kvorning Ternov, Rasmus R. Paulsen, and Anders Nymark Christensen
Applications of Medical Artificial Intelligence, Oct 2022
Design of Automated Robotic System for Draping Prepreg Composite Fabrics
Lars-Peter Ellekilde, Jakob Wilm, Ole W. Nielsen, Christian Krogh, Ewa Kristiansen, Gudmundur G. Gunnarsson, Thor Stærk Stenvang, Johnny Jakobsen, Morten Kristiansen, Jens A. Glud, Morten Hannemose, Henrik Aanæs, Joachim Kruijk, Ingolf Sveidahl, Asim Ikram, and Henrik G. Petersen