Video Display Research Articles

Transana Qualitative Video and Audio Analysis Software as a Tool for Teaching Intellectual Assessment Skills to Graduate Psychology Students

This article draws on the author's experience using qualitative video and audio analysis, most notably through use of the Transana qualitative video and audio analysis software program, as an alternative method for teaching IQ administration skills to students in a graduate psychology program. Qualitative video and audio analysis may be useful for psychology programs to more effectively and efficiently train students on IQ administration. Through use of Transana, video and audio footage and corresponding verbal and nonverbal transcripts of student-conducted IQ administrations can be coded and organized and later retrieved by any combination of codes, file or clip identifiers, or collections of clips and presented as a simultaneous, running display of video, audio, and corresponding transcripts that facilitates rich analysis and feedback.

Identification and assessment of product's measures to improve resource efficiency: the case-study of an Energy using Product

Abstract The article introduces the “Resource Efficiency Assessment of Products” (REAPro) method to assess and improve the resource efficiency of Energy Using Products, with a special focus to their end-of-life. The method allows to identify product's hot spots relevant for the following criteria: reusability/recyclability/recoverability (in mass and in terms of environmental impacts); recycled content (in mass and in terms of environmental impacts); use of hazardous substances. The method is structured into five steps: characterization of the product; assessment against the selected criteria; identification of product's hot spots; identification of improvement measures (at the product level); assessment of policy measures for resource efficiency (at the ‘product group’ level). The method includes the calculation of a comprehensive set of lifecycle based indices, including some original indices, as the “Reusability/Recyclability/Recoverability benefits rates” and the “Recycled content benefit rate”. The method is applied to a case-study Liquid Cristal Display (LCD) television. Some exemplary measures to improve resource efficiency of television are discussed as: the improvement of products recyclability through the setting of thresholds of the time for dismantling; the setting of a minimum recycled content of large plastic parts; the declaration of the content of indium in the displays. Potential environmental benefits associated to these measures have been estimated. The method also proved to be relevant to current European Union (EU) policies and some of the presented results are being used as input for some on-going policy processes.

A reflectance display

We present a reflectance display: a dynamic digital display capable of showing images and videos with spatially-varying, user-defined reflectance functions. Our display is passive: it operates by phase-modulation of reflected light. As such, it does not rely on any illumination recording sensors, nor does it require expensive on-the-fly rendering. It reacts to lighting changes instantaneously and consumes only a minimal amount of energy. Our work builds on the wave optics approach to BRDF fabrication of Levin et al. shortciteLevinBRDFFab13. We replace their expensive one-time hardware fabrication with a programable liquid crystal spatial light modulator, retaining high resolution of approximately 160 dpi. Our approach enables the display of a much wider family of angular reflectances, and it allows the display of dynamic content with time varying reflectance properties---"reflectance videos". To facilitate these new capabilities we develop novel reflectance design algorithms with improved resolution tradeoffs. We demonstrate the utility of our display with a diverse set of experiments including display of custom reflectance images and videos, interactive reflectance editing, display of 3D content reproducing lighting and depth variation, and simultaneous display of two independent channels on one screen.

The sustained attention to response task (SART) does not promote mindlessness during vigilance performance.

In this study, we evaluated the validity of the Sustained Attention to Response Task (SART) as a means for promoting mindlessness in vigilance performance. Vigilance tasks typically require observers to respond to critical signals and to withhold responding to neutral events. The SART features the opposite response requirements, which supposedly leads it to promote a mindless, non-thoughtful approach to the vigilance task To test that notion, we compared the SART to the traditional vigilance format (TVF) in terms of diagnostic accuracy assessed through decision theory measures of positive and negative predictive power (PPP and NPP), perceived mental workload indexed by the Multiple Resource Questionnaire, and oculomotor activity reflected in the Nearest Neighbor Index and fixation dwell times. Observers in TVF and SART conditions monitored a video display for collision flight paths in a simulated air traffic control task. Diagnostic accuracy in terms of NPP was high in both format conditions. While PPP was poorer in the SART than in the TVF, that result could be accounted for by a loss of motor control rather than a lack of mindfulness. Identical high levels of workload were generated by the TVF and SART tasks, and observers in both conditions showed similar dynamic scanning of the visual scene. The data indicate that the SART is not an engine of mindlessness. The results challenge the widespread use of the SART to support a model in which mindlessness is considered to be the principal root of detection failures in vigilance.

Design of Real-Time Large Field Video Display System Based on FPGA

In order to realize the large field or view digital video images into PAL format analog video output,this article introduce a real-time display system of large visual field in the basis of FPGA. Apply the EP2S30F672I4 chip of the StraixII series to be the core processing unit, which is from the Altera; and the CSC12M25BMP19 camera, from the Teli, to be the image data source, with 25 Hz of output frame rate and a resolution of 2048 x 2048 on images. The Cameralink interface is adopted to be the data transmission channel between the camera and interface card, which carries out the configuration of the camera, image data acquisition, caching, image reduction and PAL format conversion, and finally accomplishes the image real-time display.This paper discusses the FPGA implementation of double bilinear interpolation algorithm, including image data frames buffer, the vertical and horizontal interpolation. The experiments results show that our expects are achieved by the algorithm and the hardware implementation.

46.3: Improvement of Holographic Video Display using a Super Fast‐refresh Liquid Crystal Film

AbstractBased on a super fast‐response liquid crystal film, we have realized real‐time holographic video display. This paper will focus on the improvement of holographic display of this film, and our achievement is useful for its potential applications in a highdefinition, large‐size, and color holographic three‐dimensional display.

3D video bit rate adaptation decision taking using ambient illumination context

3-Dimensional (3D) video adaptation decision taking is an open field in which not many researchers have carried out investigations yet compared to 3D video display, coding, etc. Moreover, utilizing ambient illumination as an environmental context for 3D video adaptation decision taking has particularly not been studied in literature to date. In this paper, a user perception model, which is based on determining perception characteristics of a user for a 3D video content viewed under a particular ambient illumination condition, is proposed. Using the proposed model, a 3D video bit rate adaptation decision taking technique is developed to determine the adapted bit rate for the 3D video content to maintain 3D video quality perception by considering the ambient illumination condition changes. Experimental results demonstrate that the proposed technique is capable of exploiting the changes in ambient illumination level to use network resources more efficiently without sacrificing the 3D video quality perception.

English

AIM: Assessment of causes of eyestrain in emmetropic patients 10-18yrs of age. SETTINGS AND DESIGN: Cross sectional study. MATERIALS AND METHODS: We did an observational study of 100 patients, 10 to 18 years of age, coming to Ophthalmology O.P.D. of KIMS, Karad, who were emmetropes (post cycloplegic retinoscopy) but complained of eyestrain. After taking thorough history of these patients, they were subjected to anterior segment and posterior segment examination followed by squint and binocular vision synaptophoric assessment, the cause was diagnosed and they were treated accordingly. RESULTS: After assessing 100 such patients we found that, 24% of patients had Video Display Terminal Syndrome (VDTS), 23% had convergence insufficiency, 17% had squint, and 7 % had ocular surface disorder. The cause were not gender related (p value >0.005). Of these VDTS and convergence insufficiency were statistically significant (p value <0.005). CONCLUSION: These findings conclude that VDTS and convergence insufficiency are frequent among emmetropes with eyestrain in the age group of 10-18yrs.

Interfacing the Analog Camera with FPGA Board for Real-time Video Acquisition

Advances in FPGA technology have dramatically increased the use of FPGAs for computer vision applications. The primary task for development of such FPGAs based systems is the interfacing of the analog camera with FPGA board. This paper describes the design and implementation of camera interface module required for connecting analog camera with Xilinx ML510 (Virtex-5 FXT) FPGA board having no video input port. Digilent VDEC1 video daughter card is used for digitizing the analog video into digital form. The necessary control logics for video acquisition and video display are designed using VHDL and Verilog, simulated in ModelSim, and synthesized using Xilinx ISE 12.1. Designed and implemented interfaces provide the real-time video acquisition and display.

Smartphones, Video Display Terminals, and Dry Eye Disease in Children

Smartphones, Video Display Terminals, and Dry Eye Disease in Children

Design and Implementation of a TEM Stripline for EMC Testing

In this paper, a stripline for radiated field immunity testing of audio/video products is designed, constructed, calibrated, and verified. Since the canonical one is only suitable for testing equipments with height less than 70 cm, there is a need of a new device which is also in compliance with EN 55020 standard for testing new large sets, like 47'' thin-film transistor liquid crystal display (TFT LCD) television sets, in the frequency range of 150 kHz-150 MHz. Increasing the height and width of testing area causes important problems in terms of field uniformity regarding the higher order modes, characteristic impedance, and reflections in addition to the room resonances and field interference sources like corners at the edges of stripline. Comprehensive numerical study is performed to overcome these problems and obtain the optimum design before the construction. Measured data show that the new stripline is in very good agreement with the specifications determined by the standards and therefore it can be used for the electromagnetic compatibility (EMC) testing.

Precautionary Measures Necessary in Liquid Crystal Display (LCD) Television Maintenance by Electronic Technicians

The study was carried out to determine precautionary measures necessary in liquid crystal display (LCD) television maintenance by electronic technician. The population for the study was 3209 consisting of 11 electronic teachers and 3198 electronic technicians. 11 electronic teachers and 155 electronic technicians selected by simple random sampling were used for the study. Questionnaire consisting of 57 items was used to elicit responses from electronic teachers and electronic technicians regarding the two research questions. Data collected were analyzed using mean while t-test for independent sample was used to test the two null hypotheses at 0.05 level of significance. Analysis revealed the important components of LCD television that may occasionally developed faults and important precautionary measures that should be taken in LCD television maintenance. It was concluded that electronic technicians should carry out maintenance of LCD televisions by observing the precautionary measures to be taken in maintenance of LCD televisions.

Musculo-skeletal Disorders among Video Display Terminal Users: A Cross-Sectional Study in a Software Company, Kolkata.

IT has revolutionized economies throughout the world, more so in India. West Bengal has also got its share of IT boom. But with this, it has brought in the class of human resource of Video Display Terminal workers operators that and along with that can cause a host of occupational problems in them namely musculoskeletal, ocular and psychological systems. The current study had assessed some of the musculoskeletal disorders occurring due to VIDEO DISPLAY TERMINAL use. An analytical cross-sectional study was done in a Software Company of Sector V, Kolkata, the IT hub of West Bengal. Of all the employees, required sample size of 206 was selected by Simple Random Sampling. After proper permissions and consent, socio-demographic variables were collected by standardized instruments, musculoskeletal morbidity was collected by Nordic questionnaire, and ergonomic practices were obtained by checklists. 90.78% of population showed some form of musculo skeletal symptoms. They were highest in fingers, elbows, wrist, shoulder, upper, while legs and lower back showed low morbidities. Increasing age, female sex, increasing years of work, repetition of work, poorer ergonomic scores all showed to have increased the symptoms. The regionwise ergonomic scores revealed how the poorer scores affected the musculo skeletal systems adversely. Several individual adverse ergonomic practices were also elicited. The study goes hand to hand with many other studies throughout the world and also in India. However, a much higher morbidity has been found in this study probably due to a symptom based questionnaire. The adverse practices obtained here goes well with other relevant studies. This study puts occupational health problems of VIDEO DISPLAY TERMINAL users, and upholds the need of future multicentric cohort studies along with implementation of proper measures to ameliorate the effects of this occupational hazard.

融合多因素的疲劳健康监测

针对VDT (Video Display Terminal，视屏显示终端)作业引发的一系列健康问题，构建智能化疲劳健康检测系统。本系统利用多参数累计评分方法计算用户健康指数，基于用户对计算机的有效操作时间及健康指数计算疲劳值，用以智能化控制用户休息提示的时间间隔与评价用户疲劳状态。系统具备智能化疲劳休息提示，基于用户生理信息及其参数变化趋势的健康评价等功能。用户通过系统可了解自身健康，并在计算机操作过程中时常进行休息，避免长时间VDT作业对身体造成伤害。用户调研结果显示，本系统在功能体验上优于市场上同类别的健康系统，在大众健康保健方面具有良好的应用前景。 Long-time use of VDTs (video display terminal) causes negative influences on users’ health. The paper presents a user-adaptive health-care system. The system can give the VDT users’ suggestions to rest after a period and present their fatigue states of every moment. The length of the period for a user is determined by the user’s health index and his/her effective VDT using time. The health index is obtained by integrating multiple physiological factors, e.g. blood pressure and heart rate, of the user. Compared to other health-care systems, our system is more intelligent by adapting to different users. Besides, the system is capable of evaluating and quantifying the user’s fatigue state in real time. The user knows well about his/her fatigue state at each moment. The evaluation and the real-time presentation of fatigue states are also highlights of our system. User studies demonstrate that the system is better than the other health-care systems in user experience, which makes it promising for practical applications.

ACQ4: an open-source software platform for data acquisition and analysis in neurophysiology research

The complexity of modern neurophysiology experiments requires specialized software to coordinate multiple acquisition devices and analyze the collected data. We have developed ACQ4, an open-source software platform for performing data acquisition and analysis in experimental neurophysiology. This software integrates the tasks of acquiring, managing, and analyzing experimental data. ACQ4 has been used primarily for standard patch-clamp electrophysiology, laser scanning photostimulation, multiphoton microscopy, intrinsic imaging, and calcium imaging. The system is highly modular, which facilitates the addition of new devices and functionality. The modules included with ACQ4 provide for rapid construction of acquisition protocols, live video display, and customizable analysis tools. Position-aware data collection allows automated construction of image mosaics and registration of images with 3-dimensional anatomical atlases. ACQ4 uses free and open-source tools including Python, NumPy/SciPy for numerical computation, PyQt for the user interface, and PyQtGraph for scientific graphics. Supported hardware includes cameras, patch clamp amplifiers, scanning mirrors, lasers, shutters, Pockels cells, motorized stages, and more. ACQ4 is available for download at http://www.acq4.org.

A study on the media arts using interactive projection mapping

Digital technology has revolutionized the way we make and experience art today. As technology has been advanced, people are well acquainted with a variety of techniques for video display of visual imagery. People expect the light to be able to paint images that are as much as they can be to the dream world. Lately new media artist create an illusion of being mapping on surface of objects, structures, buildings and displayed in public spaces. A new trend of video mapping technology allow for interactive projection mapping. This study is focused on research on media arts using projection mapping techniques and based on these we produce a media art work “DYMANIC ROOM” through the conceptual development and the technical aspects of interactive video projection mapping.

PaperCAD: A System for Interrogating CAD Drawings Using Small Mobile Computing Devices Combined with Interactive Paper

Smartphones have become indispensable computational tools. However, some tasks can be difficult to perform on a smartphone because these devices have small displays. Here, we explore methods for augmenting the display of a smartphone, or other PDA, using interactive paper. Specifically, we present a prototype interface that enables a user to interactively interrogate technical drawings using an Anoto-based smartpen and a PDA. Our software system, called PaperCAD, enables users to query geometric information from CAD drawings printed on Anoto dot-patterned paper. For example, the user can measure a distance by drawing a dimension arrow. The system provides output to the user via a smartpen’s audio speaker and the dynamic video display of a PDA. The user can select either verbose or concise audio feedback, and the PDA displays a video image of the portion of the drawing near the pen tip. The project entails advances in the interpretation of pen input, such as a method that uses contextual information to interpret ambiguous dimensions and a technique that uses a hidden Markov model to correct interpretation errors in handwritten equations. Results of a user study suggest that our user interface design and interpretation techniques are effective and that users are highly satisfied with the system.

Paper] 3D Audio System Using Multiple Vertical Panning for Large-screen Multiview 3D Video Display

Abstract Inthispaper,a3Daudiosystemusingmultipleverticalpanning(MVP),whichmatchesaudiotoalarge-screenmultiview3Dvideodisplaysystem,isproposed. Theverticalpositionofsoundimagesissynthesizedbythepanningbetweentwoloudspeakersplacedattheupperandlowersidesofthescreen. Thehorizontalpositionofthesoundimagesiscontrolledbythepositionoftwoloudspeakers. Usingtheproposedsystem,multipleviewerscansimultaneouslyfeelthesoundimagesatthepositionof3Dobjects. Alisteningtestwasusedtoexaminewhetherviewerscanperceivethesynthesizedsoundimagesatthepositionbetweentwoloudspeakers. Theresultsofanaudio-visualexperimentshowthattheproposed3Daudiosystemwaseffectiveascomparedwithaconventionalsystembecauseviewerscouldalwaysfeelthesynthesizedsoundimagesatthepositionofthe3Dvideoobject. Key words: ultra-realistic communication, 3D audio system, vertical panning, multiview 3D video display system 1. Introduction Ultra-realistic communication techniques have beeninvestigatedintheNICT 1) . Ifthesetechniquesareap-plied, this will enable more realistic forms of commu-nication (e.g., 3DTV phone and 3D teleconferencing)thanthosecurrentlyofferedbyconventionalvideoandaudiotechniques(HDvideoand5.1-channelaudio).AttheNICT,aglasses-free3Dvideotechniqueusinga projector array has been proposed and a multiview3D video display system, in which the size of a screenis 200 inches

Polyphonic/Pseudo-synchronic: Animated Writing in the Comment Feed of Nicovideo

Nicovideo is a popular video-sharing site in Japan that incorporates several aspects of social media into its design. Key among these is the projection of user-made comments into the video display by having text scroll across the screen like an animated subtitle-track. The movement of comments across the screen and the ‘pseudo-synchronicity’ created by the way they are projected produces a feeling of ‘live’ viewing via a sense of virtual time shared between users. In this article I argue that the feeling of movement and time on the site directs users toward a certain kind of vision that, when considered alongside the modes of counter-transparent communication taken up by its user base through things like orthographic ‘mistypes’, is part of a shift between denotational and pictorial forms of text production that troubles the distinction between reading and other modes of vision. The article conceptualizes what kind of vision Nicovideo’s interface suggests and its relationship to a distinct kind of polyphonic, anonymous communication that intersects with ideas of animation and performance. It is particularly through the intensity of textual representation that I will pursue these questions.

The consumer’s choice among television displays: A multinomial logit approach

The consumer’s choice over a bundle of products depends on observable and unobservable characteristics of goods and consumers. This choice is made in order to maximize utility subject to a budget constraint. At the same time, firms make product differentiation decisions to maximize profit. Quality is a form of differentiation. An example of this occurs in the TV market, where several displays are developed. Our objective is to determine the probability for a consumer of choosing a type of display from among five kinds: standard tube, LCD, plasma, projection and LED. Using a multinomial logit approach, we find that electronic appliances like DVDs and audio systems, as well as socioeconomic status, increase the probability of choosing a high-tech television display. Our empirical approximation contributes to further understanding rational consumer behavior through the theory of utility maximization and highlights the importance of studying market structure and analyzing changes in welfare and efficiency.