Enabling concurrent dual views on common LCD screens

Kim, Seokhwan; Cao, Xiang; Zhang, Haimo; Tan, Desney

doi:10.1145/2207676.2208369

Cited by 33 publications

(19 citation statements)

References 12 publications

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“…The risk of shoulder-surfing a users' presentation style during password creation can be mitigated by using LCD screens with concurrent dual views [8]. Even if an adversary observes or somehow determines a user's presentation style, it may help them predict the first click-points but not the remaining four.…”

Section: Discussion Of Security Implicationsmentioning

confidence: 99%

The presentation effect on graphical passwords

Thorpe

Al-Badawi

MacRae

et al. 2014

Proceedings of the SIGCHI Conference on Human Factors in Computing Systems

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We provide a simple yet powerful demonstration of how an unobtrusive change to a graphical password interface can modify the distribution of user chosen passwords, and thus possibly the security it provides. The only change to the interface is how the background image is presented to the user in the password creation phase-we call the effect of this change the "presentation effect". We demonstrate the presentation effect by performing a comparative user study of two groups using the same background image, where the image is presented in two different ways prior to password creation. Our results show a statistically different distribution of user's graphical passwords, with no observed usability consequences.

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Section: Discussion Of Security Implicationsmentioning

confidence: 99%

The presentation effect on graphical passwords

Thorpe

Al-Badawi

MacRae

et al. 2014

Proceedings of the SIGCHI Conference on Human Factors in Computing Systems

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“…Finally, similar to Wigdor et al [39], color was not investigated, as color consistency across the wall is hard to achieve under differing viewing angles, creating a likely confound. This is especially true in our setup, as color perception is heavily influenced by the viewing angles of particular LCD models [22,26], and some viewing angles can even invert color perception. The interactive object and the remote modulus were drawn with a distinct color of ∼ 81% intensity (#7FFFD4, #FFB6C1).…”

Section: Visual Variablementioning

confidence: 99%

“…Its effect for comparison tasks, however, will have to be further investigated. Yet, given the high influence of LCD screens' viewing angles on color perception [22,26] results may be difficult to generalize for other large wall setups.…”

Section: Implications For Designmentioning

confidence: 99%

Perception of Visual Variables on Tiled Wall-Sized Displays for Information Visualization Applications

Bezerianos

Isenberg

2012

IEEE Trans. Visual. Comput. Graphics

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Fig. 1. Two viewers analyzing data visualizations from different viewpoints in front of a large high-resolution wall display (a). A participant conducting a trial during our first experiment (b).Abstract-We present the results of two user studies on the perception of visual variables on tiled high-resolution wall-sized displays. We contribute an understanding of, and indicators predicting how, large variations in viewing distances and viewing angles affect the accurate perception of angles, areas, and lengths. Our work, thus, helps visualization researchers with design considerations on how to create effective visualizations for these spaces. The first study showed that perception accuracy was impacted most when viewers were close to the wall but differently for each variable (Angle, Area, Length). Our second study examined the effect of perception when participants could move freely compared to when they had a static viewpoint. We found that a far but static viewpoint was as accurate but less time consuming than one that included free motion. Based on our findings, we recommend encouraging viewers to stand further back from the display when conducting perception estimation tasks. If tasks need to be conducted close to the wall display, important information should be placed directly in front of the viewer or above, and viewers should be provided with an estimation of the distortion effects predicted by our work-or encouraged to physically navigate the wall in specific ways to reduce judgement error.

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“…Lenticular displays, using sheets of lenticular lenses atop a standard LCD screen allowing for different views based on gaze angle; Parallax-barrier or Masked Displays, employing masks, be they singular portholes [22] or a series of holes or slits [44], in order to control what subpixels are viewed at a given angle; or even modified Twisted Nematic Displays e.g. Kim et al [21]. Today's state of the art multi-view technology currently is that of high refresh rate, low pixel-persistence 12 displays combined with active shutter glasses which can selectively reveal or mask frames as they are displayed.…”

Section: Facilitatingmentioning

confidence: 99%

A review of collocated multi-user TV

McGill

Williamson

Brewster

2015

Pers Ubiquit Comput

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The TV plays a central role in our homes, bringing friends and family together by providing a common reference point for live, on-demand and interactive media. However the capabilities of the modern day TV poorly reflect this social, multi-user context. The TV is in the process of being supplemented, and in some cases replaced, by other devices and displays (e.g. phones, tablets) in what is termed "multi-screening". This allows users to engage in separate and private activities alongside TV usage. The result of this is that users are "together alone" inhabiting private digital bubbles, their activity and interactions cut off from those around them. This paper outlines why facilitating multi-user use of the TV is important within the context of existing multi-screen usage, and reviews how we might go about designing TVs that better support the social contexts in which they reside. Firstly we discuss how we interact with and share use of the TV, before examining how our TV usage has been augmented by multi-screening. We then review designs for multi-user TV: from shared use TV interfaces, to using the TV as a medium by which multi-screen activity can be shared, to TVs capable of providing multiple independent physical views, allowing for both private and collaborative activity on a single shared display. Finally we discuss new technologies that might have a part to play in determining the future role of the TV. This paper demonstrates that, contrary to existing usage, the TV can be of increasing relevance in the multi-user, multi-screen era.

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Enabling concurrent dual views on common LCD screens

Cited by 33 publications

References 12 publications

The presentation effect on graphical passwords

The presentation effect on graphical passwords

Perception of Visual Variables on Tiled Wall-Sized Displays for Information Visualization Applications

A review of collocated multi-user TV

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