• Title/Summary/Keyword: Image display system

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Design and Implementation of High-Resolution Integral Imaging Display System using Expanded Depth Image

  • Song, Min-Ho;Lim, Byung-Muk;Ryu, Ga-A;Ha, Jong-Sung;Yoo, Kwan-Hee
    • International Journal of Contents
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    • v.14 no.3
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    • pp.1-6
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    • 2018
  • For 3D display applications, auto-stereoscopic display methods that can provide 3D images without glasses have been actively developed. This paper is concerned with developing a display system for elemental images of real space using integral imaging. Unlike the conventional method, which reduces a color image to the level as much as a generated depth image does, we have minimized original color image data loss by generating an enlarged depth image with interpolation methods. Our method was efficiently implemented by applying a GPU parallel processing technique with OpenCL to rapidly generate a large amount of elemental image data. We also obtained experimental results for displaying higher quality integral imaging rather than one generated by previous methods.

Efficient Tiled Stereo Display System for Tangible Meeting

  • Kim, Ig-Jae;Ahn, Sang-Chul;Kim, Hyoung-Gon
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08b
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    • pp.1239-1241
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    • 2007
  • In this paper, we present a tiled display system for tangible meeting. We built our system as a distributed system and use GPU based warping and image blending technique for real-time processing. For efficiency, we update specific area only, where the remote user exist, in real-time and blended it with static panoramic image of remote site.

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The correlation of the halo mura and off-axis light leakage level in LCDs with 2D dimmable LED backlight system

  • Kwon, Jang-Un;Byun, Min-Chul;Ham, Jung-Hyun;Baek, Heume-Il;Moon, Hong-Man;Shin, Hyun-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.590-593
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    • 2009
  • In the 2D local dimmable LED backlight system, each LED segment can be controlled separately. This can enhance the contrast ratio and reduce overall power consumption of LCDs. However, an artifact such as 'halo mura' can be observed around the bright object in the dark background. This is caused by the light leakage from the bright area into the dark one. Therefore, the 'halo mura' can be more easily observed in the oblique viewing direction. Thus, in this study, the perceivable degree of the halo mura is evaluated according to the level of the off-axis light leakage of LCDs. It is found that an acceptable degree of halo mura can be obtained in 2.0 cd/$m^2$ of the diagonal light leakage. In addition, the halo mura is unperceivable under 0.7 cd/$m^2$ of the diagonal light leakage which can be achieved with optimally compensated polarizers.

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Three-Dimensional Television using Optical Scanning Holography

  • Poon, Ting-Chung
    • Journal of Information Display
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    • v.3 no.3
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    • pp.12-16
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    • 2002
  • We first review a real-time three-dimensional (3-D) holographic recording technique called optical scanning holography (OSH) and discuss holographic reconstruction using spatial light modulators (SLMs). We then present how the overall system can be used for 3-D holographic television (TV) display with a wide-angle view of a 3-D image, and address some of the issues encountered. Finally, we suggest some techniques to alleviate the issues encountered in such a 3-D holographic TV system.

New Image Mapping Algorithm for 3D Integral Imaging Display System used in Virtual Reality

  • Suk, Myung-Hoon;Min, Sung-Wook
    • 한국정보디스플레이학회:학술대회논문집
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    • 2005.07a
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    • pp.41-45
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    • 2005
  • A new algorithm of the image mapping which is a technique of the elemental image generation is proposed. The proposed method is based on the characteristics of the lens array such as the number, the size and the focal length of the elemental lens. The 3D image generated by 3D graphic API such as OpenGL can be directly adopted without the complex adaptation. Since the image mapping using the proposed method can enhance the speed of the elemental image generation, the computer- generated integral imaging system can be applied to virtual reality system.

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Development of the HDTV Camera and Monitor for Stereoscopic 3D Display

  • Kim, Nam;Kwon, Ki-Chul;Park, Jae-Hyeung
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.1033-1036
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    • 2008
  • In this paper, we describe the development of the polarized-light stereoscopic monitoring system based on full HDTV. The system consists of the stereoscopic camera part, image processing device for the stereoscopic image recording and stereoscopic display. The developed stereoscopic imaging display system reduces eyestrain and viewer fatigue.

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Development of 32-Channel Image Acquisition System for Thickness Measurement of Retina (망막 두께 측정을 위한 32채널 영상획득장치 개발)

  • 양근호;유병국
    • Proceedings of the Korea Institute of Convergence Signal Processing
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    • 2003.06a
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    • pp.110-113
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    • 2003
  • In this paper, the multi-channel high speed data acquisition system is implemented. This high speed signal processing system for 3-D image display is applicable to the manipulation of a medical image processing, multimedia data and various fields of digital image processing. In order to convert the analog signal into digital one, A/D conversion circuit is designed. PCI interface method is designed and implemented, which is capable of transmission a large amount of data to computer. In order to, especially, channel extendibility of images acquisition, bus communication method is selected. By using this bus method, we can interface each module effectively. In this paper, 32-channel A/D conversion and PCI interface system for 3-dimensional and real-time display of the retina image is developed. The 32-channel image acquisition system and high speed data transmission system developed in this paper is applicable to not only medical image processing as 3-D representation of retina image but also various fields of industrial image processing in which the multi-point realtime image acquisition system is needed.

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Image and Display Quality Evaluation

  • Ha, Yeong-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.1224-1227
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    • 2009
  • When evaluating the quality of images and displays, it is important to combine the characteristics as perceived by the human visual system and measured by equipment using subjective and objective methods, respectively. In the case of objective methods, the quality of a display is measured using colorimetric or radiometric devices according to existing standards covering the color temperature, gamut size, gamma characteristic, and device characterization. Meanwhile, subjective methods assess the quality of an image using the human visual system based on a comparison with a reference or counterpart using such metrics as the sharpness, noise, contrast, saturation, and color accuracy. Objective and subjective methods are usually used together in comparison, as ultimately it is observers watching images on a display. In addition to existing objective methods, a new image quality metric is also introduced as regards the JPEG compression ratio that is reflected in the relationship between the gamut size and the color fidelity in CIELAB color space.

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Three-dimensional Display of Microscopic Specimen using Integral Imaging Microscope and Display (집적 영상 현미경과 집적 영상 디스플레이를 이용한 미세시료의 3차원 영상 재생)

  • Lim, Young-Tae;Park, Jae-Hyeung;Kwon, Ki-Chul;Kim, Nam
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.34 no.11B
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    • pp.1311-1319
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    • 2009
  • Microscopic specimen was captured by an integral imaging microscope and displayed as a three-dimensional image by an integral imaging display system. We applied the generalized relationship between pickup and display using two different lens arrays to our integral imaging microscope and display system. In order to display three-dimensional microscopic image, scaling of the captured elemental images is required. We analyzed the effect of the scaling coefficient in terms of the distortion of the displayed three-dimensional image and the loss of the captured elemental images. In our experiment, microscopic specimen is picked up by an integral imaging microscope having $125{\mu}m$ elemental lens pitch and displayed as three-dimensional image by an integral imaging display system having 1mm elemental lens pitch. The scaling coefficient was chosen to minimize the elemental image loss.

A Study of Head-Up Display System for Automotive Application (Head-Up Display 장치의 자동차 적용을 위한 연구)

  • Yang, In-Beom;Lee, Hyuck-Kee;Kim, Beong-Woo
    • Transactions of the Korean Society of Automotive Engineers
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    • v.15 no.4
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    • pp.27-32
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    • 2007
  • Head-Up Display system makes it possible for the driver to be informed of important vehicle data such as vehicle speed, engine RPM or navigation data without taking the driver's eyes off the road. Long focal length optics, LCD with bright illumination, image generator and vehicle interface controllers are key parts of head-up display system. All these parts have been designed, developed and applied to the test vehicle. Virtual images are located about 2m ahead of the driver's eye by projecting it onto the windshield just below the driver's line of sight. Developed head-up display system shows satisfactory results for future commercialization.