• Title/Summary/Keyword: parallax barrier

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Development of parallax-barrier autostereoscopic display (Parallax-barrier방식 입체영상 디스플레이 개발)

  • 이용범;이남호;안상호
    • 제어로봇시스템학회:학술대회논문집
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    • 1997.10a
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    • pp.1880-1883
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    • 1997
  • An Parallax-Barrier type autostereoscopic display system is implemented to overcome the handicap of current glass-typed stereo imaging system which gives operators unnatural feeling and reluctance. This system is composed of image mixing part of two input images, A/D transformation part, scan conversion part to eliminate the rainbow interference phenomenon, and pin-hole type barrier lens. For the fine display the accurate slit width of barrier is calculated in consideration of retina size, and the samsung 10.4" TFT-LCO was used as flat display monitor.itor.

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Autostereoscopic Display based on Dual Layer Parallax Barrier (이중 계층 패렐랙스 배리어 기반의 무안경식 3D 디스플레이)

  • Lee, Hyun;Lee, Eung-Don;Um, Gi-Mun;Cheong, Won-Sik;Lee, Sung-Jung
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.48 no.6
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    • pp.68-76
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    • 2011
  • We introduce a parallax barrier type autostereoscopic display in order to overcome the limited viewing angle of the conventional parallax barrier type displays. The proposed method adopts a special structure of double pairs of ITO that have a common TN-LC at the core of the conventional parallax barrier. Compared with the conventional parallax barrier type displays, the proposed display uses moving parallax barriers and eye tracking system to make stereoscopic view images adapted to the movement of viewer. We implemented a prototype of the proposed dual layer parallax barrier system, and verified that the proposed autostereoscopic display maintains seamless 3D views even when a viewer's head is moving.

Study on Viewpoint Estimation for Moving Parallax Barrier 3D Display (이동형 패럴랙스 배리어 방식의 모바일 3D 디스플레이를 위한 시역계측기술에 관한 연구)

  • Kim, Gi-Seok;Cho, Jae-Soo
    • Journal of Institute of Control, Robotics and Systems
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    • v.18 no.1
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    • pp.7-12
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    • 2012
  • In this paper, we present an effective viewpoint estimation algorithm for the Moving parallax barrier method of 3D display mobile device. Moving parallax barrier is designed to overcome the biggest problem, the limited view angle. To accomplish it, the position of the viewer's eyes or face should be estimated with strong stability and no latency. We focus on these requirements in the poor performance of mobile processors. We used a pre-processing algorithm in order to overcome the various illumination changes. And, we combined the conventional Viola-Jones face detection method and Optical-flow algorithm for robust and stable viewpoint estimation. Various computer simulations prove the effectiveness of the proposed method.

STEREOSCOPIC EYE-TRACKING SYSTEM BASED ON A MOVING PARALLAX BARRIER

  • Chae, Ho-Byung;Lee, Gang-Sung;Lee, Seung-Hyun
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2009.01a
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    • pp.189-192
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    • 2009
  • We present a novel head tracking system for stereoscopic displays that ensures the viewer has a high degree of movement. The tracker is capable of segmenting the viewer from background objects using their relative distance. A depth camera is used to generate a key signal for head tracking application. A method of the moving parallax barrier is also introduced to supplement a disadvantage of the fixed parallax barrier that provides observation at the specific locations.

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Autostereoscopic Display System Using a Variable Parallax Barrier (가변형 패럴랙스배리어를 이용한 무안경 디스플레이 시스템)

  • Wi, Sung-Min;Lee, Seung-Hyun
    • Korean Journal of Optics and Photonics
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    • v.19 no.2
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    • pp.95-102
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    • 2008
  • An advantage of parallax barrier displays is that they can also display 2D and 3D contents and can be automatically switched between the two types. But, as the viewer changes position, different views of the scene will be directed by the barrier to the visual system. Moving horizontally beyond a certain point will produce "image flipping" of the different views of the scene. These limitations make unavoidable the use of another autostereoscopic display solutions like eye tracking or increasing the number of views. In this paper, a method of the moving parallax barrier design is introduced to supplement a disadvantage of the fixed parallax barrier that provides observation at specific locations. For making the moving parallax barrier, the cross connector with 640 lines FPC is designed. A commercially available web camera is utilized to implement eye-tracking system and shows the experimental result.

Autostereoscopic 3D display system with moving parallax barrier and eye-tracking (이동형 패럴랙스배리어와 시점 추적을 이용한 3D 디스플레이 시스템)

  • Chae, Ho-Byung;Ryu, Young-Roc;Lee, Gang-Sung;Lee, Seung-Hyun
    • Journal of Broadcast Engineering
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    • v.14 no.4
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    • pp.419-427
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    • 2009
  • We present a novel head tracking system for stereoscopic displays that ensures the viewer has a high degree of movement. The tracker is capable of segmenting the viewer from background objects using their relative distance. A depth camera using TOF(Time-Of-Flight) is used to generate a key signal for eye tracking application. A method of the moving parallax barrier is also introduced to supplement a disadvantage of the fixed parallax barrier that provides observation at the specific locations.

A Multi-View Images Interleaving for Slanted Parallax Barrier based Display Device (사선형 시차 장벽 기반 입체 디스플레이 장치를 위한 다중 시점 영상 생성)

  • Jung, Kyung-Boo;Park, Jong-Il;Choi, Byung-Uk
    • Journal of Broadcast Engineering
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    • v.17 no.3
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    • pp.491-502
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    • 2012
  • Flat panel-based parallax barrier or lenticular based 3D display devices that have been developed recently are designed to feel depth. In order to see a three-dimensional(3D) image by the display device, a multi-view image displayed on the flat panel must be regenerated from images of multi-views using a subsampling method. Previous subsampling methods are focused on reducing crosstalk. In this paper, we focus on a misalignment that is occurred on manufacture process of slanted parallax barrier based autostereoscopic display device. Therefore, we propose a interleaving method that considers tilt of slanted parallax barrier, aperture size, and distance between an autostereoscopic display device and a viewer to see a 3D image regardless of a viewer position.

A Three-dimensional Transparent Display with Enhanced Transmittance and Resolution Using an Active Parallax Barrier with See-through Areas on an LCD Panel

  • Park, Minyoung;Choi, Hee-Jin
    • Current Optics and Photonics
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    • v.1 no.2
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    • pp.95-100
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    • 2017
  • The transmittance of the three dimensional (3D) transparent display is an important factor and can be enhanced by adding a see-through area to the displayed 3D image in order to transmit an ambient light with maximum transparency. However, there is a side effect that the perceived 3D resolution can be degraded due to the see-through area. In this paper, we propose an advanced method to resolve the above trade-off relation between the transparency and the 3D resolution by using an active parallax barrier (PB) with a see-through area. The experimental results are also presented to prove the proposed principle.

Eye-Tracking 3D Display System Using Variable Parallax Barrier and DDC/CI (가변형 패럴랙스 배리어와 DDC 통신을 이용한 시점추적형 3D 디스플레이 시스템)

  • Che, Ho-Byoung;Yoo, Young-Rok;Kim, Jin-Soo;Lee, Sang-Hun;Lee, Seung-Hyun
    • Korean Journal of Optics and Photonics
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    • v.20 no.2
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    • pp.102-109
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    • 2009
  • In this paper, we introduce an eye-tracking 3D display system using variable parallax barrier and DDC communication. A barrier of variable parallax barrier composed of 4 sub-barriers and a commercially available web camera is utilized to implement the eye-tracking system. The coordinates of a viewer is extracted from the web camera transfer to 3D display via DDD/CI communication. The variable barrier attached to the LCD moves electrically according to the right eye position for 3D images. This system is compared experimentally with the commercial parallax barrier methods.

Estimating Location in Real-world of a Observer for Adaptive Parallax Barrier (적응적 패럴랙스 베리어를 위한 사용자 위치 추적 방법)

  • Kang, Seok-Hoon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.23 no.12
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    • pp.1492-1499
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    • 2019
  • This paper propose how to track the position of the observer to control the viewing zone using an adaptive parallax barrier. The pose is estimated using a Constrained Local Model based on the shape model and Landmark for robust eye-distance measurement in the face pose. Camera's correlation converts distance and horizontal location to centimeter. The pixel pitch of the adaptive parallax barrier is adjusted according to the position of the observer's eyes, and the barrier is moved to adjust the viewing area. This paper propose a method for tracking the observer in the range of 60cm to 490cm, and measure the error, measurable range, and fps according to the resolution of the camera image. As a result, the observer can be measured within the absolute error range of 3.1642cm on average, and it was able to measure about 278cm at 320×240, about 488cm at 640×480, and about 493cm at 1280×960 depending on the resolution of the image.