The effects of field of view on the perception of 3D slant from texture

Todd, James T.; Thaler, Lore; Dijkstra, Tjeerd M. H.

doi:10.1016/j.visres.2005.01.003

Cited by 51 publications

(77 citation statements)

References 47 publications

(64 reference statements)

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“…The observers' judgments of slant in Experiment 1 (see Figure 3) were generally accurate: Our observers did not exhibit the underestimation that has been obtained in many previous studies (see, e.g., Andersen et al, 1998;Rosas et al, 2004;Saunders, 2003;Todd et al, 2005). Given that our surfaces were physically slanted in depth (instead of being simulated computationally and then displayed on a frontoparallel monitor or projection screen), it is possible that other monocular factors, such as accommodative blur (Ciuffreda, Wang, & Vasudevan, 2007;Frisby, Buckley, & Horsman, 1995;Watt, Akeley, Ernst, & Banks, 2005), contributed to the accurate performance of our observers in Experiment 1.…”

Section: Methodssupporting

confidence: 75%

“…Past research on the perception of slant, conducted mostly with computer-generated texture patterns, has typically shown underestimation (e.g., Andersen et al, 1998;Gibson, 1950b;Newman et al, 1973;Rosas et al, 2004;Saunders, 2003;Todd et al, 2005). The observers in our Experiment 2 also exhibited underestimation when they judged the surface slants by using magnitude estimation (see Figure 8).…”

Section: Discussionmentioning

confidence: 46%

“…One of the primary purposes of the present set of experiments was to evaluate the observers subtended 21.8º visual angle (cf. Todd et al, 2005). The viewing distance from the observers' eye to the nearest part of the textured surfaces was 25 cm; the farthest visible portion of the textured surfaces across the various slant conditions was 50 cm.…”

mentioning

confidence: 95%

See 2 more Smart Citations

Aging and the perception of slant from optical texture, motion parallax, and binocular disparity

Norman

Crabtree

Bartholomew

et al. 2009

Perception & Psychophysics

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Section: Methodssupporting

confidence: 75%

Section: Discussionmentioning

confidence: 46%

See 1 more Smart Citation

Aging and the perception of slant from optical texture, motion parallax, and binocular disparity

Norman

Crabtree

Bartholomew

et al. 2009

Perception & Psychophysics

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“…Another limitation examined by Todd and colleagues (Todd, Thaler, & Dijkstra, 2005;Todd, Thaler, Dijkstra, Koenderink, & Kappers, 2007) is that the equations relating surface slant to variations in texture density are expressed in units of visual angle. Accordingly, Fig.…”

Section: Textured Imagesmentioning

confidence: 99%

Fechner, information, and shape perception

Lappin

Norman

Phillips

2011

Atten Percept Psychophys

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How do retinal images lead to perceived environmental objects? Vision involves a series of spatial and material transformations-from environmental objects to retinal images, to neurophysiological patterns, and finally to perceptual experience and action. A rationale for understanding functional relations among these physically different systems occurred to Gustav Fechner: Differences in sensation correspond to differences in physical stimulation. The concept of information is similar: Relationships in one system may correspond to, and thus represent, those in another. Criteria for identifying and evaluating information include (a)resolution, or the precision of correspondence; (b)uncertainty about which input (output) produced a given output (input); and (c)invariance, or the preservation of correspondence under transformations of input and output. We apply this framework to psychophysical evidence to identify visual information for perceiving surfaces. The elementary spatial structure shared by objects and images is the second-order differential structure of local surface shape. Experiments have shown that human vision is directly sensitive to this higher-order spatial information from interimage disparities (stereopsis and motion parallax), boundary contours, texture, shading, and combined variables. Psychophysical evidence contradicts other common ideas about retinal information for spatial vision and object perception. The fundamental problem of vision is to understand how retinal images lead to perceived environmental objects Spatial vision is so marvelously effective that usually it is taken for granted. We perceive environmental objects but not the visual instrument by which they are revealed. Spatial vision pervades our conscious experience, but our understanding of the underlying visual mechanisms has substantial gaps.Gaps in understanding occur especially at the interfaces between visual subsystems, where information is transferred from one physical and spatial format to another. How does vision transcend vast changes in format-involving 3-D objects and spaces, 2-D optical images, neural spike trains and synaptic interactions in multiple neural areas, conscious perceptions, and behavioral actions? How do immaterial knowledge and experience arise from material objects and events? The present article offers a theoretical framework for addressing these issues-based on the concept of information, involving corresponding relational structures in physically separate domains. We describe criteria for identifying and evaluating structural correspondence and then apply these criteria to research on shape perception. Fechner' s insightIn the 19th century, Gustav Fechner struggled for years to find a scientific rationale for linking the material and mental worlds. Material objects have mass and spatial extent, but mental experience has neither. Some have concluded that mental events belong to a spiritual world. Fechner, however, believed that mind and body are inseparable and that mental events are emerg...

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“…• The mirror plane is mapped with a texture, which is a simple structured pattern, to improve the perception of mirror's orientation relative to the virtual scene [23].…”

Section: Technique and Designmentioning

confidence: 99%

Laparoscopic Virtual Mirror New Interaction Paradigm for Monitor Based Augmented Reality

Navab

Feuerstein

Bichlmeier

2007

2007 IEEE Virtual Reality Conference

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A major roadblock for using augmented reality in many medical and industrial applications is the fact that the user cannot take full advantage of the 3D virtual data. This usually requires the user to move the virtual object, which disturbs the real/virtual alignment, or to move his head around the real objects, which is not always possible and/or practical. This problem becomes more dramatic when a single camera is used for monitor based augmentation, such as in augmented laparoscopic surgery. In this paper we introduce an interaction and 3D visualization paradigm, which presents a new solution to this old problem. The interaction paradigm uses an interactive virtual mirror positioned into the augmented scene, which allows easy and complete interactive visualization of 3D virtual data.This paper focuses on the exemplary application of such visualization techniques to laparoscopic interventions. A large number of such interventions aims at regions inside a specific organ, e.g. blood vessels to be clipped for tumor resection. We use highresolution intra-operative imaging data generated by a mobile Carm with cone-beam CT imaging capability. Both the C-arm and the laparoscope are optically tracked and registered in a common world coordinate frame. After patient positioning, port placement, and carbon dioxide insufflation, a C-arm volume is reconstructed during patient exhalation and superimposed in real time on the laparoscopic live video without any need for an additional patient registration procedure. To overcome the missing perception of 3D depth and shape when rendering virtual volume data directly on top of the organ's surface view, we introduce the concept of a laparoscopic virtual mirror: A virtual reflection plane within the live laparoscopic video, which is able to visualize a reflected side view of the organ and its interior. This enables the surgeon to observe the 3D structure of, for example, blood vessels by moving the virtual mirror within the augmented monocular view of the laparoscope.

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The effects of field of view on the perception of 3D slant from texture

Cited by 51 publications

References 47 publications

Aging and the perception of slant from optical texture, motion parallax, and binocular disparity

Aging and the perception of slant from optical texture, motion parallax, and binocular disparity

Fechner, information, and shape perception

Laparoscopic Virtual Mirror New Interaction Paradigm for Monitor Based Augmented Reality

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