• Title/Summary/Keyword: video resolution

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Using a high-resolution LED display Dual Scanning Image Control System Design (듀얼 스캐닝을 이용한 고해상 LED 전광판 영상제어장치설계)

  • Ha, Young-Jea;Kim, In-Jea;Kim, Sun-Hyung
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.7
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    • pp.1415-1422
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    • 2011
  • In this paper, full color billboards for the efficient expression of the resolution to offer dual-scanning control method, using the LED display it on a fixed pixel video signal to the pixel dot pattern was changed. And DICT(Dynamic Image Correction Technology) using the main controller in accordance with video information, histogram equalization of image gray scale values to be uniformly distributed, and dynamically improves image quality by converting the area, and a dual auto-scan input video switching controller board as the pixels in the LED Module by controlling the physical manifestation of the existing board LED pixel dots than 4 times the resolution proposes a technique that can be expressed and made it through testing verified the performance.

Research Trends of Generative Adversarial Networks and Image Generation and Translation (GAN 적대적 생성 신경망과 이미지 생성 및 변환 기술 동향)

  • Jo, Y.J.;Bae, K.M.;Park, J.Y.
    • Electronics and Telecommunications Trends
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    • v.35 no.4
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    • pp.91-102
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    • 2020
  • Recently, generative adversarial networks (GANs) is a field of research that has rapidly emerged wherein many studies conducted shows overwhelming results. Initially, this was at the level of imitating the training dataset. However, the GAN is currently useful in many fields, such as transformation of data categories, restoration of erased parts of images, copying facial expressions of humans, and creation of artworks depicting a dead painter's style. Although many outstanding research achievements have been attracting attention recently, GANs have encountered many challenges. First, they require a large memory facility for research. Second, there are still technical limitations in processing high-resolution images over 4K. Third, many GAN learning methods have a problem of instability in the training stage. However, recent research results show images that are difficult to distinguish whether they are real or fake, even with the naked eye, and the resolution of 4K and above is being developed. With the increase in image quality and resolution, many applications in the field of design and image and video editing are now available, including those that draw a photorealistic image as a simple sketch or easily modify unnecessary parts of an image or a video. In this paper, we discuss how GANs started, including the base architecture and latest technologies of GANs used in high-resolution, high-quality image creation, image and video editing, style translation, content transfer, and technology.

Implementation of Real-Time Multi-Camera Video Surveillance System with Automatic Resolution Control Using Motion Detection (움직임 감지를 사용하여 영상 해상도를 자동 제어하는 실시간 다중 카메라 영상 감시 시스템의 구현)

  • Jung, Seulkee;Lee, Jong-Bae;Lee, Seongsoo
    • Journal of IKEEE
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    • v.18 no.4
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    • pp.612-619
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    • 2014
  • This paper proposes a real-time multi-camera video surveillance system with automatic resolution control using motion detection. In ordinary times, it acquires 4 channels of QVGA images, and it merges them into single VGA image and transmit it. When motion is detected, it automatically increases the resolution of motion-occurring channel to VGA and decreases those of 3 other channels to QQVGA, and then these images are overlaid and transmitted. Thus, it can magnifies and watches the motion-occurring channel while maintaining transmission bandwidth and monitoring all other channels. When it is synthesized with 0.18 um technology, the maximum operating frequency is 110 MHz, which can theoretically support 4 HD cameras.

Multi-Resolution Layered Coding for Real- Time transmission using block transforms on MPEG-2 Video stream (MPEG-2 블록층 변환을 이용한 Multi-Resolution Layered Coding에 관한 연구)

  • 손호신;유우종;김형철;전창근;유관종
    • Proceedings of the Korean Information Science Society Conference
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    • 1998.10a
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    • pp.465-467
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    • 1998
  • MPEG-2 는 Layered Coding방식을 채택하여 하나의 base layer와 4개의 enhancement layer로 이루어져 있으나 동영상 재생을 위해 필요한 최소한의 layer인 base layer 만으로도 데이터 양이 많기 때문에 인터넷 환경에 적용하기가 어렵다. 이에 base layer를 다시 세분화된 layer로 나누기 위해 인코딩 중에는 또는 인코딩 결과로 만들어지는 MPEG-2 Video steam 의 하부 구조인 블록층에 존재하는 8$\times$8블록의 AC 계수들을 layering한다. Layered된 base layer의 데이터는 통신망 및 단말기의 QoS에 따라 서로 다른 전송 채널을 통해 서버에서 클라이언트 디코더로 전송된 후 디코더에 실시간적으로 병합한 후 재생된다. 본 논문에서 제안하는 기법을 이용하여 기존에 encoding MPEG-2 Video steam의 AC계수를 layering할 경우에 QoS에 따라 가변적으로 데이터 양을 서버 쪽에서 조절할 수 있었고, 통신 선로 상에서 이동하는 데이터 양의 원래의 MPEG-2 Video steam 을 이용했을 때보다 인코딩 중에 블록을 변환하면 51% 정도 감소하고 인코딩 되어진 데이터를 이용했을 경우에는25%정도 감소하는 것을 알 수 있었다.

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Implementation of Uncompressed HD Video Visualization Service for Ultra High Resolution Display (초고해상도 디스플레이를 위한 비압축 HD 가시화 서비스 구현)

  • Choi, Ki-Ho;Renambot, Luc;Kim, Jong-Won
    • 한국HCI학회:학술대회논문집
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    • 2007.02a
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    • pp.713-718
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    • 2007
  • 본 논문에서는 실시간적인 요소와 높은 경험의 질을 요구하는 다자간 협업 환경에서 고해상도 비디오를 제공하기 위하여, 무손실과 저지연, 저비용의 특징을 갖는 비압축 HD 비디오를 처리할 수 있는 '비압축 HD 비디오 전송 응용' (Scalable Video Tool)을 구현하여 초고해상도 디스플레이를 위한 비압축 HD 가시화 서비스'를 구성한다. Scalable Video Tool (SVT)은 Microsoft 사의 Direct Show를 기반으로, 비압축 HD 카메라와 DV 카메라, WebCam의 영상도 실시간으로 처리가 가능하다. 초고해상도 디스플레이에 고해상도 비디오와 이미지 가시화를 지원하는 SAGE(Scalable adaptive graphics environment)[2]와 SVT를 연동하여 다자간 협업 환경에서 다양한 형태의 고해상도 비디오와 그래픽스 자료를 공유할 수 있는 시스템을 구성한다. 본 논문의 마지막에서는 $5{\times}11$의 격자 형태로 구성된 타일드 디스플레이 (Tiled Display)를 이용하여 제안된 시스템을 검증한다.

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Three-Dimensional Subband Coding of Video using Wavelet Packet Algorithm (웨이브릿 패킷 알고리즘을 이용한 3차원 비디오 서브밴드 코딩)

  • Chu, Hyung Suk;An, Chong Koo
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.54 no.11
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    • pp.673-679
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    • 2005
  • This Paper presents the 3D wavelet transformation based video compression system, which possesses the capability of progressive transmission by increasing resolution and increasing rate for multimedia applications. The 3D wavelet packet based video compression system removes the temporal correlation of the input sequences using the motion compensation filter and decomposes the spatio-temporal subband using the spatial wavelet packet transformation. The proposed system allocates the higher bit rate to the low frequency image of the 3D wavelet sequences and improves the 0.49dB PSNR performance of the reconstructed image in comparison with that of H.263. In addition to the limitation on the propagation of the motion compensation error by the 3D wavelet transformation, the proposed system progressively transmits the input sequence according to the resolution and rate scalability.

A High-Resolution Image Reconstruction Method Utilizing Automatic Input Image Selection from Low-Resolution Video (저해상도 동영상에서의 자동화된 입력영상 선별을 이용한 고해상도 영상 복원 방법)

  • Kim Sung-Deuk
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.43 no.2 s.308
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    • pp.12-18
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    • 2006
  • This paper presents a method to extract a good high-resolution image from a low-resolution video in an automatic manner. Since a high-resolution image reconstruction method utilizing several low-resolution input images works better than a conventional interpolation method utilizing single low-resolution input image only if the input images are well registered onto a common high-resolution grid, low-resolution input images should be carefully chosen so that the registration errors can be carefully considered. In this paper, the statistics obtained from the motion-compensated low-resolution images are utilized to evaluate the feasibility of the input image candidates. Maximum motion-compensation error is estimated from the high-resolution image observation model. U the motion-compensation error of the input image candidate is greater than the estimated maximum motion-compensation error, the input image candidate is discarded. The number of good input image candidates and the statistics of the motion-compensation errors are used to choose final input images. The final input images chosen from the input image selection block are given to the following high-resolution image reconstruction block. It is expected that the proposed method is utilized to extract a good high-resolution image efficiently from a low-resolution video without any user intervention.

Selection of Scalable Video Coding Layer Considering the Required Peak Signal to Noise Ratio and Amount of Received Video Data in Wireless Networks (무선 네트워크에서 요구되는 평균 최대 신호 대 잡음비와 수신 비디오 데이터양을 고려하는 스케일러블 비디오 코딩 계층 선택)

  • Lee, Hyun-No;Kim, Dong-Hoi
    • Journal of Digital Contents Society
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    • v.17 no.2
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    • pp.89-96
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    • 2016
  • SVC(Scalable Video Coding), which is one form among video encoding technologies, makes video streaming with the various frame rate, resolution, and video quality by combining three different scalability dimensions: temporal, spatial, and video quality scalability. As the above SVC-encoded video streaming consists of one base layer and several enhancement layers, and a wireless AP(Access Point) chooses and sends a suitable layer according to the received power from the receiving terminals in the changeable wireless network environment, the receiving terminals supporting SVC are able to receive video streaming with the appropriate resolution and quality according to their received powers. In this paper, after the performance analysis for the received power, packet loss rate, PSNR(Required Peak Signal to Noise Ratio), video quality level and amount of received video data based on the number of SVC layers was performed, an efficient method for selecting the number of SVC layer satisfying the RSNR and minimizing the amount of received video data is proposed.

High Spatial Resolution Optical Characterization of LCDs and their Components

  • Boher, P.;Bignon, T.;Leroux, Thierry
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.859-862
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    • 2008
  • We present a new tool to measure precisely the emissive properties of displays at the pixel level with submicrometric spatial resolution. It is useful to check the technological defects and their impact on the emissive properties of the displays. Backlight films and transflective and reflective displays are measured.

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Development of portable game device with uncompressed HD video and high quality sound output (비압축 HD급 영상 및 고음질 음성 출력을 지원하는 휴대용 게임기 구현)

  • Lee, Chung-Hee;Lee, Jong-Hun;Jung, Woo-Young
    • Proceedings of the KIEE Conference
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    • 2006.10c
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    • pp.391-393
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    • 2006
  • In this paper, we develop a portable game device with uncompressed HD video and high quality sound output. Portable game devices support not only game function but also various complex functions recently. It especially supports TV-Out port to play realistic game, connecting a large screen display device. But the video and audio output signals of conventional TV-out port have the low performance and these signals are analog output. So, it is difficult that the users enjoy realistic game with benefit of high resolution digital TV. We propose the game device output with uncompressed digital signal, which has no delay of video/audio signal, also has strong immunity to external noise. Since it supports a high resolution video and high quality sound, users can playa realistic game. First, we implement the HDMI to the game device and we test reliability with the various resolutions video inputs and audio inputs. The proposed method can be applied multimedia devices requiring high performance output function as well as portable devices.

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