Digital Imaging Primer

Parkin, Alan

doi:10.1007/978-3-540-85619-1

Cited by 11 publications

(3 citation statements)

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“…The shape of the empirical horopter depends on viewing distance. An empirical horopter is close to theoretical horopter (curvature radius ≒ viewing distance/2) at a viewing distance of approximately 25 cm, gets flatter as the viewing distance increases, approaches a straight line at a viewing distance of approximately 6 m, and becomes a convex curve at a viewing distance >6 m (Parkin, 2015;von Helmholtz, 1962). The better performance of 1200R and 600R, in terms of visual search accuracy, compared with that of 400R is presumably related to the degree of image distortion due to the slightly excessive display curvature for 400R, although this should be verified in a future study.…”

Section: Horizontal Viewing Angle and Horoptermentioning

confidence: 70%

Curved Versus Flat Monitors: Interactive Effects of Display Curvature Radius and Display Size on Visual Search Performance and Visual Fatigue

Kyung

Park

2020

Hum Factors

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Objective The aim of this study is to examine the interactive effects of display curvature radius and display size on visual search accuracy, visual search speed, and visual fatigue. Background Although the advantages of curved displays have been reported, little is known about the interactive effects of display curvature radius and size. Method Twenty-seven individuals performed visual search tasks at a viewing distance of 50 cm using eight configurations involving four display curvature radii (400R, 600R, 1200R, and flat) and two display sizes (33″ and 50″). To simulate curved screens, five flat display panels were horizontally arranged with their centers concentrically repositioned following each display curvature radius. Results For accuracy, speed, and fatigue, 33″–600R and 50″–600R provided the best or comparable-to-best results, whereas 50″–flat provided the worst results. For accuracy and fatigue, 33″–flat was the second worst. The changes in the horizontal field of view and viewing angle due to display curvature as well as the association between effective display curvature radii and empirical horopter (loci of perceived equidistance) can explain these results. Conclusion The interactive effects of display curvature radius and size were evident for visual search performance and fatigue. Beneficial effects of curved displays were maintained across 33″ and 50″, whereas increasing flat display size from 33″ to 50″ was detrimental. Application For visual search tasks at a viewing distance of 50 cm, 33″–600R and 50″ 600R displays are recommended, as opposed to 33″ and 50″ flat displays. Wide flat displays must be carefully considered for visual display terminal tasks.

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Section: Horizontal Viewing Angle and Horoptermentioning

confidence: 70%

Curved Versus Flat Monitors: Interactive Effects of Display Curvature Radius and Display Size on Visual Search Performance and Visual Fatigue

Kyung

Park

2020

Hum Factors

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“…or crossed, as mentioned on page 218 in book [33], but is similar to the viewing methods with extra optical components or systems, such as those mentioned on page 220-224 of this book. The lateral distance of the two cameras is 65 mm, which is equal to the average interocular distance of humans.…”

Section: Methodsmentioning

confidence: 98%

“…Figure 9 demonstrates the captured images for the dual-viewer vision, respectively, whilst watching 3D at the maximum-left and -right view angles, ±12 method, which is widely used in the other literature [8,18]. The naked eye 3D display method studied in this paper is distinguished from the direct viewing method, uncrossed or crossed, as mentioned on page 218 in book [33], but is similar to the viewing methods with extra optical components or systems, such as those mentioned on page 220-224 of this book. The lateral distance of the two cameras is 65 mm, which is equal to the average interocular distance of humans.…”

Section: Methodsmentioning

confidence: 99%

Directionally Illuminated Autostereoscopy with Seamless Viewpoints for Multi-Viewers

Zhang,

Chen,

Wang

et al. 2024

Micromachines

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Autostereoscopy is usually perceived at finite viewpoints that result from the separated pixel array of a display system. With directionally illuminated autostereoscopy, the separation of the illumination channel from the image channel provides extra flexibility in optimizing the performance of autostereoscopy. This work demonstrates that by taking advantage of illumination freedom, seamless viewpoints in the sweet viewing region, where the ghosting does not cause significant discomfort, are realized. This realization is based on illuminating the screen with a polyline array of light emitting diodes (LEDs), and continuous viewpoints are generated through independent variation in the radiance of each individual LED column. This new method is implemented in the directionally illuminated display for both single and multiple viewers, proving its effectiveness as a valuable technique for achieving a high-quality and high-resolution autostereoscopic display with seamless viewpoints.

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Colour Environments

Parkin¹

2018

Computing Colour Image Processing

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Digital Imaging Primer

Cited by 11 publications

References 0 publications

Curved Versus Flat Monitors: Interactive Effects of Display Curvature Radius and Display Size on Visual Search Performance and Visual Fatigue

Curved Versus Flat Monitors: Interactive Effects of Display Curvature Radius and Display Size on Visual Search Performance and Visual Fatigue

Directionally Illuminated Autostereoscopy with Seamless Viewpoints for Multi-Viewers

Colour Environments

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