Large-screen Display Research Articles

Augmented Reality Fashion Apparel Simulation using a Magic Mirror

Digital technology innovations have led to significant changes in everyday life, made possible by the widespread use of computers and continuous developments in information technology (IT). Based on the utilization of systems applying 3D(three-dimensional) technology, as well as virtual and augmented reality techniques, IT has become the basis for a new fashion industry model, featuring consumer-centered service and production methods. Because of rising wages and production costs, the fashion industry’s international market power has been significantly weakened in recent years. To overcome this situation, new markets must be established by building a new knowledge and technology-intensive fashion industry. Development of virtual clothing simulation software, which has played an important role in the fashion industry’s IT-based digitalization, has led to continuous technological improvements for systems that can virtually adapt existing 2D(two-dimensional) design work to 3D design work. Such adaptions have greatly influenced the fashion industry by increasing profits. Both here and abroad, studies have been conducted to support the development of consumercentered, high value-added clothing and fashion products by employing digital technology. This study proposes a system that uses a depth camera to capture the figure of a user standing in front of a large display screen. The display can show fashion concepts and various outfits to the user, coordinated to his or her body. Thus, a “magic mirror” effect is produced. Magic mirror-based fashion apparel simulation can support total fashion coordination for accessories and outfits automatically, and does not require computer or fashion expertise. This system can provide convenience for users by assuming the role of a professional fashion coordinator giving an appearance presentation. It can also be widely used to support a customized method for clothes shopping.

Eye Height Manipulations

Virtual reality technology can be considered a multipurpose tool for diverse applications in various domains, for example, training, prototyping, design, entertainment, and research investigating human perception. However, for many of these applications, it is necessary that the designed and computer-generated virtual environments are perceived as a replica of the real world. Many research studies have shown that this is not necessarily the case. Specifically, egocentric distances are underestimated compared to real-world estimates regardless of whether the virtual environment is displayed in a head-mounted display or on an immersive large-screen display. While the main reason for this observed distance underestimation is still unknown, we investigate a potential approach to reduce or even eliminate this distance underestimation. Building up on the angle of declination below the horizon relationship for perceiving egocentric distances, we describe how eye height manipulations in virtual reality should affect perceived distances. In addition, we describe how this relationship could be exploited to reduce distance underestimation for individual users. In a first experiment, we investigate the influence of a manipulated eye height on an action-based measure of egocentric distance perception. We found that eye height manipulations have similar predictable effects on an action-based measure of egocentric distance as we previously observed for a cognitive measure. This might make this approach more useful than other proposed solutions across different scenarios in various domains, for example, for collaborative tasks. In three additional experiments, we investigate the influence of an individualized manipulation of eye height to reduce distance underestimation in a sparse-cue and a rich-cue environment. In these experiments, we demonstrate that a simple eye height manipulation can be used to selectively alter perceived distances on an individual basis, which could be helpful to enable every user to have an experience close to what was intended by the content designer.

영상정보디스플레이용 비대칭 비구면 삼각 프리즘 광학계 연구

We have investigated anamorphic prism lenses with distortions of 0.3-0.5%. We designed the plastic triangular lens and confirmed the minimum resolution using MTF graphs. Also we confirmed that the SVGA optical system can realize a resolution of <TEX>$864{\times}648$</TEX> 56 megapixels. A distortion of about 0.5% aberration appears in the maximum field, and a finite beam aberration of about <TEX>$15{\mu}m$</TEX> is confirmed. We made a mold based on the design data and completed the prism lens through exodus molding. We confirmed the shape error (< <TEX>$30{\mu}m$</TEX>) and surface roughness (> 40 nm) of the three sides. We made the video-information-display prototype glasses using prism lens by measuring the performance, we determined the distortion aberration (0.3%) and SVGA resolution. Our approach will enable fabrication of a portable large-screen display device for glasses and sunglasses for the domestic market and, after 2015, for the world market.

User-designed movement interactions. An exploratory study for natural interactions

The context of this paper is movement and gesture-based interaction for natural user interaction (NUI) design. Naturalness is not an intrinsic but a perceived quality; and although movement seems an ideal candidate for NUIs, it bears its own limitations. Although experience can be drawn from other interaction styles (e.g. desktop graphical interfaces, touch), we advocate that movement - based natural interaction should also be tackled from a fresh perspective. Many existing works are technology - driven; our approach focuses on users’ definitions of interactions, leaving the technical issues for later works. In this paper, we present an experiment that identifies a set of user-defined gestures for a set of core tasks in freehand movement interaction using a large screen display. The experiment is divided into two steps, for exploration and validation. The exploratory step uses a bottom-up approach. We use the context of a large screen television. Subjects were asked to spontaneously perform gestures to achieve a set of typical tasks (e.g. pointing, selecting, engaging/disengaging) in a wizard-of-Oz setup. We isolated the favored interactions for such tasks. The validation step uses a top-down approach. We used a motion capture device to produce skeleton videos of the gestures retained from step one. An online questionnaire allowed validating the first findings and assessing how the suggested interactions can be perceived. From those experiment we drew five natural, typical interactions corresponding to five tasks, that are heavily preferred by subjects and which form good candidates as controls in future interaction designs.

Can I Recognize My Body's Weight? The Influence of Shape and Texture on the Perception of Self

The goal of this research was to investigate women's sensitivity to changes in their perceived weight by altering the body mass index (BMI) of the participants' personalized avatars displayed on a large-screen immersive display. We created the personalized avatars with a full-body 3D scanner that records the participants' body geometry and texture. We altered the weight of the personalized avatars to produce changes in BMI while keeping height, arm length, and inseam fixed and exploited the correlation between body geometry and anthropometric measurements encapsulated in a statistical body shape model created from thousands of body scans. In a 2 × 2 psychophysical experiment, we investigated the relative importance of visual cues, namely shape (own shape vs. an average female body shape with equivalent height and BMI to the participant) and texture (own photo-realistic texture or checkerboard pattern texture) on the ability to accurately perceive own current body weight (by asking the participant, “Is it the same weight as you?”). Our results indicate that shape (where height and BMI are fixed) had little effect on the perception of body weight. Interestingly, the participants perceived their body weight veridically when they saw their own photo-realistic texture. As compared to avatars with photo-realistic texture, the avatars with checkerboard texture needed to be significantly thinner in order to represent the participants' current weight. This suggests that in general the avatars with checkerboard texture appeared bigger. The range that the participants accepted as their own current weight was approximately a 0.83% to − 6.05% BMI change tolerance range around their perceived weight. Both the shape and the texture had an effect on the reported similarity of the body parts and the whole avatar to the participant's body. This work has implications for new measures for patients with body image disorders, as well as researchers interested in creating personalized avatars for games, training applications, or virtual reality.

Attentional costs and failures in air traffic control notifications

Large display screens are common in supervisory tasks, meaning that alerts are often perceived in peripheral vision. Five air traffic control notification designs were evaluated in their ability to capture attention during an ongoing supervisory task, as well as their impact on the primary task. A range of performance measures, eye-tracking and subjective reports showed that colour, even animated, was less effective than movement, and notifications sometimes went unnoticed. Designs that drew attention to the notified aircraft by a pulsating box, concentric circles or the opacity of the background resulted in faster perception and no missed notifications. However, the latter two designs were intrusive and impaired primary task performance, while the simpler animated box captured attention without an overhead cognitive cost. These results highlight the need for a holistic approach to evaluation, achieving a balance between the benefits for one aspect of performance against the potential costs for another.Practitioner summary: We performed a holistic examination of air traffic control notification designs regarding their ability to capture attention during an ongoing supervisory task. The combination of performance, eye-tracking and subjective measurements demonstrated that the best design achieved a balance between attentional power and the overhead cognitive cost to primary task performance.

The Implementation of Sub-Window Contrast Adjustment in Large Screen Displayer for Aircraft

With the development of modern aircraft, and the increasing aircraft performance day by day, the pilot need gain more and more information. The application of the large screen makes a lot of flight information on one display monitors. The large screen display picture is composed of several child pictures, which need several displayers formerly, but the display operation is not as convenient as traditional independent operating monitors. This paper proposes a method based on sprite in large screen display contrast and adjustment, through the collection of pilots’ touch screen operation information on the screen. And then it implements the sprite window open and the adjustment of the contrast in the FPGA. Using the proposed approach, the pilot can easily adjust the contrast of sprite in the large screen display, meeting the modern aircraft in all aspects of the mission requirements.

Tiled large-screen three-dimensional display consisting of frameless multi-view display modules

To realize large-screen three-dimensional (3D) displays, frameless multi-view display modules are arranged two-dimensionally. This paper proposes a multi-view display module in which a multi-view flat-panel display is projected onto a screen of the module to provide a frameless screen. The display module consists of a multi-view flat-panel display, an imaging lens, an aperture, a screen lens, and a vertical diffuser. Prototype display modules were constructed having a screen size of 27.3 in., a 3D resolution of 320 × 200, and 144 viewpoints. Four modules were tiled vertically to provide a screen size of 62.4 in. Distortions in the screen imaging and viewpoint generation were corrected.

Electronic patient journey boards a vital piece of the puzzle in patient flow.

Internationally, there is growing interest in the applicability of visual management in healthcare, although little is known about the extent of its effectiveness. In the past 5 years technical advances have permitted the integration of all relevant data into a singular display that can improve staff efficiency, accelerate decisions, streamline workflow processes and reduce oversights and errors in clinical practice. The aim of the case study is to describe the features and application of electronic patient journey boards (EPJBs) as an enabler to accelerate patient flow that has been demonstrated and evaluated in Queensland Health hospitals. In 2012 and 2013 we collected ward-specific data that was sourced from the Queensland Hospital Admitted Patient Data Collection, determining the top 10 overnight diagnostic-related groups (DRGs) for each ward participating in the pilots. The Statistical Output Unit within Queensland Health then provided data and analysis on the ALOS for each of these DRGs for the period following an EPJB installation, along with the ALOS for the same DRGs for the corresponding period in the previous year. Patient length of stay reduced and display of estimated discharge dates improved with the introduction of EPJBs along with improved communication and information management resulting in time savings from 20 min per staff member per shift to 2.5h per ward a day. Queensland and South Australian Health systems have succeeded in 'making the hospital patient journey visible' through an innovative combination of information management and prominent display of key information related to patient care portrayed on large liquid crystal display (LCD) screens in hospital wards.

A COMPACT MULTIBAND PLANAR MONOPOLE ANTENNA FOR SLIM MOBILE HANDSET APPLICATIONS

A planar compact multiband monopole antenna is presented for ultra-slim mobile handset applications. The proposed antenna operates over 0.885 GHz-0.962 GHz and 1.69 GHz-3.8 GHz frequency bands with −6 dB impedance bandwidth that covers GSM900, GSM1800, GSM1900, UMTS, IMT2100, WLAN, WiMAX along with most of the higher LTE bands of modern mobile phone applications. The radiation characteristics of the antenna is analyzed in term of radiation patterns, peak realized gain, total radiation efficiency, and surface current distribution. The radiation patterns of the proposed antenna are dipole like which is suitable for mobile applications with 73-93% total radiation efficiency. The proposed antenna is investigated in free space as well as in actual mobile environment consisting of mobile plastic housing along with large metallic display screen and battery. No significant effect on the operating bands of the mobile antenna due to the actual mobile environment on the impedance bandwidth is observed. Specific absorption rate (SAR) computation is carried out on human head phantom. The computed values of SAR lie well below the specified limit over 1 g and 10 g of tissues. The parametric analysis is also carried out to understand the effect of the shape parameters.

Realization of Electronic Scoring Device on Ball Games

Aim to the current popularity of various sports which scoring device is inconvenient and defective scoring, this design uses 51 MCU control, battery power, digital display, input keys and wireless control module to develop a portable smart match electronic scoring device. The device has a charging indicator, ball selection, single-sided display settings, size of the Bureau of scores shows that beep audio prompts, change sides scores mobile, long distance remote control and other functions; particularly compact and portable, which one could keep working dozens of hours without any power, and you can add large-screen display, which perfectly suited all size of table tennis, badminton, volleyball and basketball games in the stadiums.

The effects of whole-class interactive instruction with Single Display Groupware for Triangles

Whole-class interactive instruction is an instructional approach in which all of the students in a class create knowledge together in an interactive way, mediated by the teacher. The current mixed-method study compared the effects of a specific implementation of whole-class interactive instruction, Single Display Groupware (SDG), with traditional classical instruction of geometry, for 69 third-grade students. In SDG students work in groups that share one area on a large display screen in front of the class. Each individual student in a group has a mouse and together the students in each group need to perform assignments by using “silent collaboration”. In the current study, the assignment for the students was to identify and create different kinds of triangles. Outcomes of interest were learning gains (quantitative) and effectiveness of “silent collaboration” (qualitative). Learning gains were significantly higher for students in the SDG condition than for students following traditional instruction. An analysis of emerging activity patterns showed that students found natural ways to silently collaborate.

Flat Knitting Machine Design Based on Display Accelerator

In this paper, the application of a FPGA-based large-screen and high-resolution display accelerator technology in full-automatic textile machinery (computerized flat knitting machine) is studied. The design of traditional computerized knitting machine system is difficult to support the display of large screen and high resolution operating interface. Therefore, a displaying accelerator is designed in this paper. It comprises of FPGA, configuration chip, SDRAM and LVDS transmitter chip, is located between the embedded main processor and high resolution TFT LCD screen of computerized flat knitting machine, and implements the modules such as display acceleration logic and SDRAM controller relying on Verilog HDL programming in FPGA. The computerized flat knitting machine, applying displaying acceleration technology, can present its dynamic color interface on an 800 x 600 resolution TFT LCD (10.4") on the condition that real time, reliability and cost can be ensured.

Can Interface Features Affect Aggression Resulting from Violent Video Game Play? An Examination of Realistic Controller and Large Screen Size

Aggressiveness attributed to violent video game play is typically studied as a function of the content features of the game. However, can interface features of the game also affect aggression? Guided by the General Aggression Model (GAM), we examine the controller type (gun replica vs. mouse) and screen size (large vs. small) as key technological aspects that may affect the state aggression of gamers, with spatial presence and arousal as potential mediators. Results from a between-subjects experiment showed that a realistic controller and a large screen display induced greater aggression, presence, and arousal than a conventional mouse and a small screen display, respectively, and confirmed that trait aggression was a significant predictor of gamers' state aggression. Contrary to GAM, however, arousal showed no effects on aggression; instead, presence emerged as a significant mediator.

Multi-view display module employing MEMS projector array

A frameless multi-view display module that consists of an array of microelectromechanical system (MEMS) based projectors, a sparse lenticular lens, and a vertical diffuser is proposed to provide a large-screen autostereoscopic display. The projectors are positioned in a horizontal vector form or in a matrix form in front of the transfer screen in order to produce the same number of three-dimensional (3D) pixels in each cylindrical lens constituting the lenticular lens to increase the horizontal resolution of the module. The projectors generate a slanted two-dimensional array of dots on the vertical diffuser to provide a large number of viewpoints. The experimental display system was constructed using four projectors. The system had a 3D resolution of 160 × 120, and it provided 64 views. The screen size was 14.4 in.

Study of Short-Wavelength Yb:Fiber Laser

Yb:fiber lasers have shown excellent performance in 980- to 1100-nm wavelength range. Below 980 nm, the small ratio between emission and absorption cross sections hindered its development. To find out a feasible solution for short-wavelength Yb:fiber laser, the temperature-dependent emission and absorption cross sections, fiber length, pumping method, and suppression of high-gain wavelengths are analyzed and discussed. It is interesting to find that elevated temperature of the gain fiber is beneficial for short-wavelength Yb:fiber laser generation, which is opposite to general perception of quasi-three-level lasers. In this paper, a 960-nm Yb:fiber laser with 20.1% slope efficiency is successfully developed at 101 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">°</sup> C, which is the shortest wavelength of Yb:fiber laser to our knowledge. And this 960-nm Yb:fiber laser can be applied in generating blue light for large-screen laser display.

The All-Optical Fiber Perimeter Alarm System

A all-fiber perimeter alarm system is designed which is composed of the optical Fiber Sensor Module(FSM) laid along the perimeter and Security Information Control Center(SICC) (including display terminals-the large screen display, the terminal of personnel operation, the system control host, etc.) and optical fiber fence (or sensor board). It uses optical fiber (cable) as the sensing and transmission device, through directly contacting with optical fiber (cable) or through the carrying material, passing various disturbances to the fiber (cable), carrying continuous real-time monitoring and collecting disturbance data. Through the back-end analysis, processing and intelligent identification, it can determine the different types of external disturbances. The system can automatically obtain the real-time alarm information that the optical cable generates and process these warning messages according to predefined business logic, then generate sound and light warning prompt and provide several functions of statistics, query on the warning message.

Evaluation of Spatial Audio for Improving Change Detection on Large Screen Displays

In the context of military command and control operations, operators are under an incredible amount of pressure to perform time-sensitive tasks in a rapidly changing environment. When the task involves a large screen display, it is easy to miss a critical event due to the overabundance of information present. In the current task, we investigated the potential of a spatial auditory cue for improving performance on a command and control monitoring task. We found that for a change detection task on a large screen display, a localized auditory cue can provide a useful and salient method of alerting operators to a change on the display. Additionally, because a spatial audio cue contains information about the location off an event on the screen, it gives the operator a better chance of detecting and responding to relevant events as they occur. Since a spatialized cue alerts the operator to the location of importance, it provides an especially critical advantage in areas of the screen which are normally associated with lower rates of detection.

Design and Evaluation of a Cell Phone Pointing Interface for Interaction with Large Projector based Displays

The availability of mobile phones enhanced with different sensors increased the possibility of using the mobile devices in various applications in ubiquitous computing. Mobile phones can be used as interaction device with other devices such as large projected displays. In this paper we propose a design of a cell phone pointing interface based on its embedded accelerometer sensor for interaction with large projector based displays. The main idea is to use a simple hand gestures for pointing to a certain point, for object selection, for object movement or for drawing various forms on large display screen. Rigorous and systematic evaluation of the proposed interface has been conducted and its efficiency has been experimentally evaluated on various tasks. The results have shown that embedded accelerometer sensor in mobile phones in combination with a simple hand gestures are a promising approach for interaction with large display screen and that potential users see ease of use, intuitiveness and enjoyment as advantages of this interaction technique.

Application of FPGA-Based Large-Screen and High-Resolution Display Accelerator in Computerized Flat Knitting Machine

In this paper, the application of a FPGA-based large-screen and high-resolution display accelerator technology in full-automatic textile machinery (computerized flat knitting machine) is studied. The design of traditional computerized knitting machine system is difficult to support the display of large screen and high resolution operating interface. Therefore, a displaying accelerator is designed in this paper. It comprises of FPGA, configuration chip, SDRAM and LVDS transmitter chip, is located between the embedded main processor and high resolution TFT LCD screen of computerized flat knitting machine, and implements the modules such as display acceleration logic and SDRAM controller relying on Verilog HDL programming in FPGA. The computerized flat knitting machine, applying displaying acceleration technology, can present its dynamic color interface on an 800 x 600 resolution TFT LCD (10.4") on the condition that real time, reliability and cost can be ensured.