• Title/Summary/Keyword: 3 Screen Data

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LCD Module Initialization and Panel Display for the Virtual Screen of LN2440SBC Embedded Systems (LN2440SBC 임베디드 시스템의 가상 스크린을 위한 LCD 모듈 초기화 및 패널 디스플레이)

  • Oh, Sam-Kweon;Park, Geun-Duk;Kim, Byoung-Kuk
    • Journal of Advanced Navigation Technology
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    • v.14 no.3
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    • pp.452-458
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    • 2010
  • In case of an embedded system with computing resource restrictions such as system power and cpu, the overhead due to displaying data on the computer screen may have a significant influence on the system performance. This paper describes an initialization method for LCD-driving components such as an ARM Core, an LCD controller, and an SPI(serial peripheral interface). It also introduces a pixel display function and a panel display method using virtual screen for reducing the display overhead for an LN2440SBC system with an ARM9-based S3C2440A microprocessor. A virtual screen is a large space of computer memories allocated much larger than those needed for one-time display of an image. Displaying a specific region of a virtual screen is done by assigning it as a view-port region. Such a display is useful in an embedded system when concurrently running tasks produce and display their respective results on the screen; it is especially so when the execution result of each task is partially modified, instead of being totally modified, on its turn and displayed. If the tasks running on such a system divide and make efficient use of the region of the virtual screen, the display overhead can be minimized. For the performance comparison with and without using the virtual screen, two different images are displayed in turn and the amount of time consumed for their display is measured. The result shows that the display time of the former is about 5 times faster than that of the latter.

Realization of Information Visualization of Electric Power Monitoring System for MV/LV Distribution Customers

  • Kim Jae-Chul;Chu Cheol-Min;Knag Bong-Seok;Kim Yeong-Il;Choi Duck-Su;Kim Kwang-Soon;Ryu Seung-Ki
    • Journal of Electrical Engineering and Technology
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    • v.1 no.3
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    • pp.287-294
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    • 2006
  • Recently, switchboards for MV/LV distribution customers have been united and digitalized rapidly. This paper proposes the effective information visualization method for the data measured from cubicle switchboards for MV/LV distribution customers. We developed the algorithm that analyzes abundant data measured by switchboards and displays them to overall users, such as fire information index, power condition index, switchboard safety index, and power diminution index. Using a touch screen made users to operate it easily. User interface was also improved by taking graphic visualization. We guess the information visualization method suggested in this paper shows the new direction that heavy electrical equipments including switchboards are going to develop in the future.

Basic Study on the Regenerator of Stilting Engine (II) - Heat transfer and flow friction loss characteristics of the regenerator with wire screen matrix - (스털링기관용 재생기에 관한 기초연구 (II) - 철망을 축열재로 한 재생기의 전열 및 유동손실특성 -)

  • 김태한;이시민;이정택
    • Journal of Biosystems Engineering
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    • v.27 no.6
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    • pp.529-536
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    • 2002
  • The performance of stilting engine, in particular, its energy conversion efficiencies are critically influenced by the regenerator characteristics. The regenerator characteristics are influenced by effectiveness, void fraction. heat transfer loss and fluid friction loss in the regenerator matrix. These factors were influenced by the surface geometry and material properties of the regenerator matrix. The regenerator design goals arc good heat transfer and low pressure drop of working Bas across the regenerator. Various data for designing a wire screen matrix have been given by Kays and London(1984). The mesh number of their experiment. however, was confined below the No. 60. which seems rather small for the Stirling engine applications. In this paper. in order to provide a basic data for the design of regenerator matrix, characteristics of heat transfer and flow friction loss were investigated by a packed mettled of matrix in oscillating flow as the same condition of operation in a Stirling engine. Seven kinds of sing1e wire screen meshes were used as the regenerator matrices. The results are summarized as follows; 1. While the working fluid flew slowly in the regenerator. the temperature difference was great at the both hot-blow(the working fluid flows from healer to cooler) and cold-blow(the working fluid flows from cooler to healer). On the other hand. while the working fluid flew fast. the temperature difference was not distinguished. 2. The No.150 wire screen used as the regenerator matrix showed excellent performance than tile others. 3. Phase angle variation and filling rate affected heat transfer or regenerator matrices. 4. Temperature difference between the inlet and outlet of the regenerator is very hish in degree of 120 phase angle.

A Study on Content Characteristics, Consumer Behavior and Economic Value According to the Degree of Consideration of Graphic Content (그래픽 콘텐츠 고려 정도에 따른 콘텐츠 특성, 소비자 행동, 경제적 가치에 관한 연구)

  • Lee, Sangho;Cho, Kwangmoon
    • Journal of Internet of Things and Convergence
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    • v.7 no.4
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    • pp.85-94
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    • 2021
  • This study verified what differences in screen golf content characteristics, intention to reuse, customer satisfaction and economic value experienced by consumers according to the image feeling, expression method, and image color provided by screen golf graphic content. In addition, the purpose of this study was to analyze what kind of influence the content characteristics of screen golf have on the economic value and what kind of influence the intention to reuse and customer satisfaction have in this process. From September 1, 2021 to September 30, 2021, a survey of 225 copies of consumers using the screen golf course was conducted. For data processing, frequency analysis, factor analysis, reliability analysis, cluster analysis, chi-square analysis and 3-step mediated regression analysis were performed. The research results are as follows. First, the preferred image feeling showed a high level of clean and sophisticated feeling and the preferred expression method showed a high realistic image. In addition, the preferred image color showed a high level of green color. Second, there were differences in competitiveness, ease of use, sense of solidarity and realism according to the degree of consideration of graphic content and differences in consumer's intention to reuse, customer satisfaction, and economic value. Third, in the relationship between screen golf content characteristics and economic value, customer satisfaction and re-use intention had a mediating effect. Through this study, by providing basic data to derive the graphic design model of screen golf, the operating entity suggested a way to improve economic benefits and tried to contribute to the growth of the screen golf industry.

Development of Virtual Reality Multi Screen Simulation System based on BIM (BIM 기반의 가상현실 다면투사 시뮬레이션 시스템 구축)

  • Seo, Myoung-Bae;Park, Hyung-Jin
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.30 no.3
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    • pp.231-238
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    • 2017
  • Using 3D based BIM(Building Information Modeling) enables a variety of construction simulations. The is no case to simulate BIM demonstration experiment on deeply immersed virtual reality environment in korea. This paper develops a multi screen based simulation system to enable 3D based immersed environment to diverse decision making and virtual construction simulation. In a developed simulation laboratory, we can carry out BIM drawing review, disaster evacuation simulation, constructability review on wild land and design urban planning using haptic device on 3-side space with 4K resolution . Also, It can review large amount of drawings without data conversion because of compatibility with BIM software.

Screen Disparity and Size Perception Function of Various 3D Stimuli (양안시차에 따른 다양한 3D 자극의 크기지각 예측함수 개발)

  • Park, JongJin;Li, Hyung-Chul O.;Kim, ShinWoo
    • Journal of Broadcast Engineering
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    • v.18 no.1
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    • pp.66-76
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    • 2013
  • Although there has been much advance in the development of 3D displays of various purpose, 3D contents are not yet so used as expected in those displays. One well-known obstacle in the enjoyment of 3D contents is visual fatigue, but another major issue is image distortion of 3D contents. In the previous research, Shin, Li, & Kim (2012) reported systematic linear relationship between screen disparity and size perception of a simple object whose retinal size was constant across different disparities. In this research, we intended to generalize the previous finding by using various 3D stimuli in the test of the relationship between screen disparity and size perception of those stimuli. Consistent with previous findings, our data indicated that size perception linearly changes as a function of screen disparity and the linearity was observed in all stimuli types we used in this research. We described the empirical relationship between screen disparity and size perception in the form of prediction function for size perception in which visual angle is the predictor. This function will be very useful in the creation of 3D contents as one can make reasonable predictions on the to-be-perceived size of an object being filmed using screen disparity of their camera setting.

An Efficient Anti-Aliasing Algorithm for Real-Time Rendering (실시간 렌더링을 위한 효율적인 Anti-Aliasing)

  • Han, Tae-Kuen;Ahn, Do-Rang;Lee, Dong-Wook
    • Proceedings of the KIEE Conference
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    • 2000.11d
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    • pp.712-714
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    • 2000
  • In the field of computer graphics, it approached the investigation of outstanding performance and high speed. Although most introduced Anti-Aliasing method were to meet these, it was not to improve speed. Because Anti-Aliasing method was focus on only qualify. Anti-Aliasing Effect is compensated from movement of object on the screen. Speed is important in the REAL-TIME application program like as 3D games. Cause Anti-Aliasing which needs great amount of time is not used in general. This Paper suggest the Efficient Anti-Aliasing method which apply Two-Point Anti-Aliasing Method that informs brightness data of the screen and use adjacent brightness data for real-time rendering.

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Development of Hazardous Food Notification Application Using CNN Model (CNN 모델을 이용한 위해 식품 알림 애플리케이션의 개발)

  • Yoon, Dong Eon;Lee, Hyo Sang;Oh, Am Suk
    • Journal of Korea Multimedia Society
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    • v.25 no.3
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    • pp.461-467
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    • 2022
  • This research is to raise awareness of food safety by designing and supporting a hazard food information notification platform for consumers. To this end, the design was carried out by dividing the process into a data extraction process, an application screen design process, and a CNN-based food inference process. Data was collected through public data APIs and crawling, and it was sent to each activity screen designed for Android studios so that it could be output. As a result, when the platform is executed, information on hazardous food names, registration dates, food classification, manufacturing dates, recovery grades, recovery reasons, recovery methods, company names, barcode numbers, and packaging units can be intuitively and conveniently checked. In addition, CNN-based food inference processes allowed mobile cameras to infer harmful food and applied various quantization techniques such as Dynamic Range, Integer, and Float16 to compare the degree of improvement in inference performance. As a result, the group that applied basic quantization and treated device resources with GPU showed the greatest improvement in inference performance. Through this platform, it is expected that the reliability of food safety will be improved by making it more convenient for consumers to recognize food risks.

Multicomponent RVSP Survey for Imaging Thin Layer Bearing Oil Sand (박층 오일샌드 영상화를 위한 다성분 역VSP 탐사)

  • Jeong, Soo-Cheol;Byun, Joong-Moo
    • Geophysics and Geophysical Exploration
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    • v.14 no.3
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    • pp.234-241
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    • 2011
  • Recently, exploration and development of oil sands are thriving due to high oil price. Because oil sands reservoir usually exists as a thin layer, multicomponent VSP, which has the advantage of the high-resolution around the borehole, is more effective than surface seismic survey in exploring oil sand reservoir. In addition, prestack phase-screen migration is effective for multicomponent seismic data because it is based on an one-way wave equation. In this study, we examined the applicability of the prestack phase-screen migration for multicomponent RVSP data to image the thin oil sand reservoir. As a preprocessing tool, we presented a method for separating P-wave and PS-wave from multicomponent RVSP data by using incidence angle and rotation matrix. To verify it, we have applied the developed wavefield separation method to synthetic data obtained from the velocity model including a horizontal layer and dipping layers. Also, we compared the migrated image by using P-wave with that by using PS-wave. As a result, the PS-wave migrated image has higher resolution and wide coverage than P-wave migrated image. Finally, we have applied the prestack phase-screen migration to the synthetic data from the velocity model simulating oil sand reservoir in Canada. The results show that the PS-wave migrated image describe the top and bottom boundaries of the thin oil sand reservoir more clearly than the P-wave migrated image.

Constructing the Development of Solids by Personal Computer (개인용 컴퓨터를 이용한 전개도 작성에 관한 연구)

  • 채희창;정인성
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.14 no.2
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    • pp.367-375
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    • 1990
  • A data structure representing 3-D objects was designed for the personal computer. It is very simple to be used in the personal computers which have small memory and low speed. A homogeneous transformation for developing 3-D objects was derived. Each developing procedure consists of five transformations : one translational-three rotational-one translational. Developing a solid is a creative work. So the results of developing vary with the order of surfaces to be developed. One method to reduce the length of seam was considered. The programs used in this study were written in Pascal and Assembly and a modeller that generates 3-D primitives was included. This program is an interactive dual-screen system. While all the menus in Korean are displayed at the monochrome monitor, the development figures with projective views are drawn at the color monitor. The program has wide applications for plate works.