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Zhang, Kaixuan (author), Shi, Zhaochen (author), Zujovic, Jana (author), de Ridder, H. (author), van Egmond, R. (author), Neuhoff, David L. (author), Pappas, T. (author)We present a systematic approach for training and testing structural texture similarity metrics (STSIMs) so that they can be used to exploit texture redundancy for structurally lossless image compression. The training and testing is based on a set of image distortions that reflect the characteristics of the perturbations present in natural...journal article 2024
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Zhao, Y. (author), Stumpel, J.F.H.J. (author), de Ridder, H. (author), Wijntjes, M.W.A. (author)Most studies on the perception of style have used whole scenes/entire paintings; in our study, we isolated a single motif (an apple) to reduce or even eliminate the influence of composition, iconography, and other contextual information. In this article, we empirically address two fundamental questions of the existence (Experiment 1) and...journal article 2023
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Chaves-de-Plaza, Nicolas F. (author), Mody, P. (author), Hildebrandt, K.A. (author), Staring, M. (author), Astreinidou, Eleftheria (author), de Ridder, Mischa (author), de Ridder, H. (author), van Egmond, R. (author)Delineation of tumours and organs-at-risk permits detecting and correcting changes in the patients' anatomy throughout the treatment, making it a core step of adaptive external beam radiotherapy. Although auto-contouring technologies have sped up this process, the time needed to perform the quality assessment of the generated contours remains a...book chapter 2022
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Mody, Prerak (author), Chaves-de-Plaza, Nicolas F. (author), Hildebrandt, K.A. (author), van Egmond, R. (author), de Ridder, H. (author), Staring, Marius (author)Deep learning models for organ contouring in radiotherapy are poised for clinical usage, but currently, there exist few tools for automated quality assessment (QA) of the predicted contours. Bayesian models and their associated uncertainty, can potentially automate the process of detecting inaccurate predictions. We investigate two Bayesian...journal article 2022
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Mei, Yanni (author), Li, Jie (author), de Ridder, H. (author), Cesar, Pablo (author)Cake customization services allow clients to collaboratively personalize cakes with pastry chefs. However, remote (e.g., email) and in-person co-design sessions are prone to miscommunication, due to natural restrictions in visualizing cake size, decoration, and celebration context. This paper presents the design, implementation, and expert...conference paper 2021
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Dekkers, T. (author), Melles, M. (author), Vehmeijer, S.B.W. (author), de Ridder, H. (author)Background: Web-based patient education is increasingly offered to improve patients’ ability to learn, remember, and apply health information. Efficient organization, display, and structural design, that is, information architecture (IA), can support patients’ ability to independently use web-based patient education. However, the role of IA in...journal article 2021
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Zhang, F. (author), de Ridder, H. (author), Barla, Pascal (author), Pont, S.C. (author)We previously presented a systematic optics-based canonical approach to test material-lighting interactions in their full natural ecology, combining canonical material and lighting modes. Analyzing the power of the spherical harmonics components of the lighting allowed us to predict the lighting effects on material perception for generic...journal article 2020
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Wang, Jing (author), Zujovic, Jana (author), Choi, June (author), Chakraborty, Basabdutta (author), van Egmond, R. (author), de Ridder, H. (author), Pappas, Thrasyvoulos N. (author)The authors explore the influence of the structure of a texture image on the perception of its color composition through a series of psychophysical studies. They estimate the color composition of a texture by extracting its dominant colors and the associated percentages. They then synthesize new textures with the same color composition but...journal article 2020
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- Christoph, M. (author), Cleij, D (author), Ahlström, H (author), Bakker, B. (author), Beggiato, M. (author), Borowsky, A. (author), van Egmond, R. (author), van Grondelle, E.D. (author), de Ridder, H. (author) report 2019
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Zhang, F. (author), de Ridder, H. (author), Barla, Pascal (author), Pont, S.C. (author)Photographers and lighting designers set up lighting environments that best depict objects and human figures to convey key aspects of the visual appearance of various materials, following rules drawn from experience. Understanding which lighting environment is best adapted to convey which key aspects of materials is an important question in...journal article 2019
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Vegt, N.J.H. (author), Visch, V.T. (author), Vermeeren, A.P.O.S. (author), de Ridder, H. (author), Hayde, Zsolt (author)This article describes a user-centered design experiment investigating positive and negative effects of adding game rules to brainstorms. We studied effects on brainstorm output and user experience and behavior. A coin-based gamification was developed with rules intended to improve brainstorm output in relation to quality and quantity of...journal article 2019
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Kartashova, T. (author), de Ridder, H. (author), te Pas, S. F. (author), Pont, S.C. (author)In this paper, we introduce a toolbox for the perceptually based visualization of light in a volume, focusing on the visual effects of illumination. First, our visualizations extend the conventional methods from a two-dimensional representation on surfaces to the whole volume of a scene. Second, we extend the conventional methods from showing...journal article 2019
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Dekkers, T. (author), Melles, M. (author), Groeneveld, B.S. (author), de Ridder, H. (author)Background: Patients with orthopedic conditions frequently use the internet to find health information. Patient education that is distributed online may form an easily accessible, time- and cost-effective alternative to education delivered through traditional channels such as one-on-one consultations or booklets. However, no systematic...review 2018
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Vegt, N.J.H. (author), Visch, V.T. (author), Vermeeren, A.P.O.S. (author), de Ridder, H. (author)In this article, we aim to provide insights into the design and implementation of game elements for teamwork on the work floor and to study their effect. Inventing games to break monotonous jobs is a long-standing practice, yet conscious implementation of motivational elements of games at work is a recent phenomenon. Generally, gamification is...journal article 2018
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Kartashova, T. (author), de Ridder, H. (author), te Pas, S.F. (author), Pont, S.C. (author)In this article, we studied perception of a particular case of light fields that is characterized by a difference in its consistent structure between parts of a scene. In architectural lighting design, such a consistent structure in a part of a light field is called a light zone. First, we explored whether human observers are sensitive to...journal article 2018
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Zhang, F. (author), de Ridder, H. (author), Pont, S.C. (author)To better understand the interactions between material perception and light perception, we further developed our material probe MatMix 1.0 into MixIM 1.0, which allows optical mixing of canonical lighting modes. We selected three canonical lighting modes (ambient, focus, and brilliance) and created scenes to represent the three illuminations....journal article 2018
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- Zhang, F. (author), de Ridder, H. (author), Barla, Pascal (author), Pont, S.C. (author) poster 2017
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Jansen, R.J. (author), van Egmond, R. (author), de Ridder, H. (author)The role of task prioritization in performance tradeoffs during multi-tasking has received widespread attention. However, little is known on whether people have preferences regarding tasks, and if so, whether these preferences conflict with priority instructions. Three experiments were conducted with a high-speed driving game and an auditory...journal article 2016
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Vegt, N.J.H. (author), Visch, V.T. (author), Vermeeren, A.P.O.S. (author), de Ridder, H. (author)Serious gaming is used as a means for improving organizational teamwork, yet little is known about the effect of individual game elements constituting serious games. This paper presents a game design experiment aimed at generating knowledge on designing game elements for teamwork. In previous work, we suggested that interaction- and goal-driven...journal article 2016
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Kartashova, T. (author), Sekulovski, D (author), de Ridder, H. (author), te Pas, SF (author), Pont, S.C. (author)Human observers have been demonstrated to be sensitive to the local (physical) light field, or more<br/>precisely, to the primary direction, intensity, and diffuseness of the light at a point in a space. In the<br/>present study we focused on the question of whether it is possible to reconstruct the global visual light field, based on observers’...journal article 2016