Searched for: author:"Van Doorn, A.J."
(1 - 20 of 31)

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Pont, S.C. (author), van Doorn, A.J. (author), Koenderink, J.J. (author)
We studied whether human observers can estimate the illumination direction from 3D textures of random Brownian surfaces, containing undulations over a range of scales. The locally Lambertian surfaces were illuminated with a collimated beam from random directions. The surfaces had a uniform albedo and thus texture appeared only through shading...
journal article 2017
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Karabulut, B. (author), van Doorn, A.J. (author), van der Voordt, D.J.M. (author)
BREEAM-NL wordt veel gebruikt om duurzame gebouwen te realiseren en te certificeren. Voor aannemers is afval scheiden op de bouwplaats vrij lastig. De eisen voor transport & logistiek zijn vooral gericht op registraties en niet op verduurzaming hiervan. Toepassing van Smart Building Logistics (SBL) zorgt voor betere afvalscheiding en minder...
journal article 2013
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Nefs, H.T. (author), Van Bilsen, A. (author), Pont, S.C. (author), De Ridder, H. (author), Wijntjes, M.W.A. (author), Van Doorn, A.J. (author)
In this paper, we focus on how people perceive the aspect ratio of city squares. Earlier research has focused on distance perception but not so much on the perceived aspect ratio of the surrounding space. Furthermore, those studies have focused on “open” spaces rather than urban areas enclosed by walls, houses and filled with people, cars, etc....
journal article 2013
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Koenderink, J.J. (author), Richards, W. (author), Van Doorn, A.J. (author)
We consider operations that change the size of images, either shrinks or blow-ups. Image processing offers numerous possibilities, put at everyone’s disposal with such computer programs as Adobe Photoshop. We consider a different class of operations, aimed at immediate visual awareness, rather than pixel arrays. We demonstrate cases of blow-ups...
journal article 2012
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Pont, S.C. (author), Koenderink, J.J. (author), Van Doorn, A.J. (author), Wijntjes, M.W.A. (author), Te Pas, S.F. (author)
We present a novel setup in which real objects made of different materials can be mixed optically. For the materials we chose mutually very different materials, which we assume to represent canonical modes. The appearance of 3D objects consisting of any material can be described as linear superposition of 3D objects of different canonical...
conference paper 2012
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Koenderink, J.J. (author), Richards, W. (author), Van Doorn, A.J. (author)
Local space-time scrambling of optical data leads to violent jerks and dislocations. On masking these, visual awareness of the scene becomes cohesive, with dislocations discounted as amodally occluding foreground. Such cohesive space-time of awareness is technically illusory because ground truth is jumbled whereas awareness is coherent....
journal article 2012
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van Doorn, A.J. (author), van der Voordt, D.J.M. (author)
Als de ambitie en doelstellingen voor het duurzame ontwerpproject helder zijn, is de volgende stap om deze te vertalen naar het Programma van Eisen (PvE). Hierin legt de opdrachtgever al zijn eisen, wensen en randvoorwaarden vast voor het project. Het PvE is een van de belangrijkste middelen die de opdrachtgever tot zijn beschikking heeft om te...
book chapter 2012
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Koenderink, J.J. (author), Van Doorn, A.J. (author), Pont, S.C. (author)
Shape from shading arose from artistic practice, and later experimental psychology, but its formal structure has only been established recently by computer vision. Some of its algorithms have led to useful applications. Psychology has reversely borrowed these formalisms in attempts to come to grips with shading as a depth cue. Results have been...
journal article 2012
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Wamelink, J.W.F. (author), Koolwijk, J.S.J. (author), van Doorn, A.J. (author)
Process innovation related to integrated project delivery is an important topic in the building industry. Studies on process innovation through the use of integrated contracts usually focus on contractors, and particularly on the possibility of forward integration into the building process. Three years ago, the first author investigated the...
conference paper 2012
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Van Doorn, A.J. (author), Koenderink, J.J. (author), Todd, J.T. (author), Wagemans, J. (author)
Human observers group local shading patterns into global super-patterns that appear to be illuminated in some unitary fashion. Many years ago, this was noticed for the case of uniform, unidirectional illumination. Recently, we found that it also applies to convergent and divergent illumination flows, but that human observers are blind to...
journal article 2012
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Van Doorn, A.J. (author), Koenderink, J.J. (author), Leyssen, M.H.R. (author), Wagemans, J. (author)
We study the effect of stylistic differences on the nature of pictorial spaces as they appear to an observer when looking into a picture. Four pictures chosen from diverse styles of depiction were studied by 2 different methods. Each method addresses pictorial depth but draws on a different bouquet of depth cues. We find that the depth...
journal article 2012
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Koenderink, J.J. (author), Van Doorn, A.J. (author)
“Pictorial space” is the mental structure that appears to be the scaffold for the visual awareness when looking “into” (as opposed to “at”) a picture. Its structure differs from the “visual space” that is the scaffold for the visual awareness when looking into the scene in front of the observer. The structure of pictorial space has been probed...
journal article 2012
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Pont, S.C. (author), Van Doorn, A.J. (author), Te Pas, S.F. (author), Wijntjes, M.W.A. (author), Koenderink, J.J. (author)
We present a novel setup in which real objects made of two different materials can be mixed optically in a linearly weighted manner. We conducted a psychophysical experiment in which observers rated optical mixtures of the three combinations of glossy, matte, and velvety green birds. The observers rated the materials on four scales: matte-glossy...
conference paper 2012
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Van Doorn, A.J. (author)
De hernieuwde aandacht voor duurzaamheid, die ruim vijf jaar geleden is ingezet, begint te resulteren in een golf van hoogwaardige projecten. Daarbij ligt de nadruk vaak op bouwkundige maatregelen die de impact op het milieu minimaliseren. Dat veel duurzame ambities in de praktijk blijven steken in goede bedoelingen, komt echter niet door een...
journal article 2011
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Van Doorn, A.J. (author), Wagemans, J. (author), De Ridder, H. (author), Koenderink, J.J. (author)
A "picture" is a at object covered with pigments in a certain pattern. Human observers, when looking "into" a picture (photograph, painting, drawing, . . . say) often report to experience a three dimensional "pictorial space." This space is a mental entity, apparently triggered by so called pictorial cues. The latter are sub-structures of color...
conference paper 2011
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Wagemans, J. (author), Van Doorn, A.J. (author), Koenderink, J.J. (author)
In the physical environment familiar size is an effective depth cue because the distance from the eye to an object equals the ratio of its physical size to its angular extent in the visual field. Such simple geometrical relations do not apply to pictorial space, since the eye itself is not in pictorial space, and consequently the notion ...
journal article 2011
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Koenderink, J.J. (author), Van Doorn, A.J. (author), Wagemans, J. (author)
Depth is the feeling of remoteness, or separateness, that accompanies awareness in human modalities like vision and audition. In specific cases depths can be graded on an ordinal scale, or even measured quantitatively on an interval scale. In the case of pictorial vision this is complicated by the fact that human observers often appear to apply...
journal article 2011
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Van Doorn, A.J. (author), van der Voordt, D.J.M. (author), Rogaar, M. (author)
Duurzaamheid is steeds vaker onderdeel van de ontwerpopgave. De motivatie voor duurzaam bouwen varieert van maatschappelijke verantwoordelijkheid tot verplicht duurzaam inkopen of het versterken van het bedrijfsimago. Het is een uitdaging om de duurzaamheidsambities tijdens het ontwikkelproces overeind te houden. Het lijkt vanzelfsprekend dat...
journal article 2011
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Van Doorn, A.J. (author)
Duurzaamheid is een blijvende trend. Veel architecten zien het inspelen op deze ontwikkeling daarom als bedrijfsmatige kans. Bureaus met een onderscheidende aanpak op dit gebied doen tegen de economische trend in goede zaken en groeien zelfs in plaats van te krimpen. Duurzaam ontwerpen en het maken van hoogwaardige architectuur gaan in alle...
journal article 2011
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Van Doorn, A.J. (author)
journal article 2011
Searched for: author:"Van Doorn, A.J."
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