Super High Definition Images Research Articles

4-1 超高精細画像によるB-ISDN利用遠隔医療コンファレンス実験

4-1 超高精細画像によるB-ISDN利用遠隔医療コンファレンス実験

Digital Cinema and Super-High-Definition Content Distribution on Optical High-Speed Networks

Digital cinema is a promising application that utilizes high-speed optical networks to transfer super-high-definition (SHD) images. The networks are primarily used for distributing digital cinema contents in packet data form, and are also used to support new services such as the live streaming of musicals and sport games to movie theaters. While current transfer services offer high-definition (HD) quality video, live-streaming applications will soon shift to providing cinema quality 4K content to both business and movie theaters users. The extra-high-quality 4K format enables a realistic telepresence, and will be combined with special tools such as video editing systems to realize effective remote collaboration for business workspaces. This paper introduces successive research on SHD image transmission and its application, especially in digital cinema and associated application fields.

A Study on Non-octave Scalable Image Coding and Its Performance Evaluation Using Digital Cinema Test Material

JPEG2000, an international standard for still image compression, offers 1) high coding performance, 2) unified lossless/lossy compression, and 3) resolution and SNR scalability. Resolution scalability is an especially promising attribute given the popularity of Super High Definition (SHD) images like digital-cinema. Unfortunately, its current implementation of resolution scalability is restricted to powers of two. In this paper, we introduce non-octave scalable coding (NSC) based on the use of filter banks. Two types of non-octave scalable coding are implemented. One is based on a DCT filter bank and the other uses wavelet transform. The latter is compatible with JPEG2000 Part2. By using the proposed algorithm, images with rational scale resolutions can be decoded from a compressed bit stream. Experiments on digital cinema test material show the effectiveness of the proposed algorithm.

Super high definition image (WHD: Wide/Double HD) transmission system

AbstractThis paper describes a WHD image transmission system constructed from a display projector, CODECs, and a camera system imaging a super high definition image (WHD: Wide/Double HD) corresponding to two screen portions of common high‐vision images. This system was developed as a transmission system to communicate with or transmit information giving a reality‐enhanced feeling to a remote location by using images of super high definition. In addition, the correction processing for the distortions of images occurring due to the structure of the camera system, an outline of the transmission experiments using the proposed system, and subjective evaluation experiments using WHD images are presented. © 2002 Wiley Periodicals, Inc. Syst Comp Jpn, 33(9): 41–49, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/scj.10063

A Study of Cooperative Proofreading Work Using Super High Definition Images and Its Evaluation

A Study of Cooperative Proofreading Work Using Super High Definition Images and Its Evaluation

Design of an SHD-distributed database over IP to support telemedicine.

We have conducted tests utilizing superhigh-definition CRTs (hereafter, referred to as a "super high-definition image system," or "SHD ": 2,048 x 2,048 pixels, 24-bit RGB gradation, noninterlace system) for autonomous and distributed medical image database systems. The system is capable of providing six times the image definition of a hi-vision television (HDTV). The aim in designing and testing the system is to enable gigabit network connectivity while displaying images on a DOS- V machine. This paper discusses how we devised an integrated environment for managing and operating distributed an SHD image database to support Telemedicine linking with ATM, with INS-1500, and with dial-up IP connection.

Super-high-definition image systems for telemedicine.

Super-high-definition (SHD) images are those with more than 2048 pixels x 2048 lines. They are of interest in the medical field because of their very high quality. We have developed a new SHD system for still pictures which is based on an SHD card that can be installed in a PC. We think that certain telemedicine applications will be facilitated by the use of SHD images.

Application of Super High Definition Images in Telemedicine: System Requirements and Technologies for Teleradiology and Telepathology

It was recognized early on that the digitization of medical information would advance the efficiency of diagnostic technology. However, the digitization of image data, which makes up the majority of medical information, is dependent on advances in technologies such as input, processing, transmission, storage, and display. Insufficient advances in such technologies has effectively limited the digitization of image data for medical use. The result of this has been non-networked systems or LANs confined to a single hospital. Such isolated systems integrate only portions of digital medical images such as x-ray computer tomography (CT), magnetic resonance (MR), and computed radiography (CR). Fortunately, recent advances in the areas of super high definition image I/O, high-quality encoding, super high speed transmission, and high-capacity storage has turned the tide in favor of the digitization and networking of all medical information. This paper will focus on the digitization and networking of medical image information used within hospitals and provide a multifaceted study of the technologies necessary for these advances. This will allow us to discuss the present state of related technical developments and the level that has been attained so far. In addition, we have targeted image information that demands the highest level of quality (radiological and pathological images) for application in medical diagnosis using super high definition images, the image technology being developed by the authors of this paper. We will cover the concrete issues and approaches to solutions that must be investigated when building and networking a digital system.

High quality image oriented telemedicine with multimedia technology

Researchers at Osaka and Kyoto University hospital performed three experiments, beginning in 1995, which looked at high quality-oriented telemedicine. This paper describes the system design for the three projects. Experiment 1 applied high-definition TV images and B-ISDN for distance learning and medical information exchange. Experiment 2 developed a super high-definition medical image filing system and the images were transmitted via B-ISDN for teleconferences and experiment 3 utilized digital, high-definition, TV images and communication satellites for teleconferences. Multimedia and communication technologies were considered to be fundamental components of telemedicine. The three projects were evaluated initially for quality of images, operability and utility. The experimental design and its implementation showed that it was possible to provide high quality image-oriented telemedicine in the health care environment. Obstacles to establishing practical telemedicine are also discussed.

Obtaining higher resolution in Asia

Important advances in digital signal processing for HDTV have occurred in Asia. This article outlines these advances, including trends in standard resolution television (STV) and progress in superhigh definition (SHD) imaging. Video coding, video recording, SHD image processing, and digital satellite broadcasting are covered, and trends in digital satellite TV and the challenges facing successful implementation of the technology are presented, as well as future research and development targets for HDTV.

High-fidelity coding for super high-definition images

The super high-definition images (SHDI) expected to be prominent in the systems of the 21st century consist of approximately 4000 scan lines and have extremely high fidelity. This paper describes a coding scheme for still SHDI. Predictive coding is thought to be a coding technique capable of not spoiling the quality of SHDI images. Thus, an extrapolative/interpolative prediction scheme that has been proposed [1] for high-efficiency coding of HDTV is used for intraframe coding of SHDI. The extrapolative prediction error is coded with a first-order Huffman code. Comparatively, the prediction efficiency of interpolative prediction is superior to that of extrapolative prediction [2]. Furthermore, since the pixel correlations of the images used in this paper are extremely high [9], the probability of the 0 representative level of the quantizer is high. Thus, in this paper, the prediction error is converted to binary levels when interpolative prediction is used and it is proposed that a coding method based on a type of arithmetic code, the QM-Coder [4], which is used in JPEG, be used to code the resulting binary information. When binary information is coded, the resulting conditional entropy of the reference pixels is shown to be rather constant; and, thus, the number of states can be reduced without an increase in the rate. Image coding simulation results show that the coding performance is improved with this method where extrapolative/interpolative prediction is used by 0.350 ∼ 0.458 bits/pel when compared with the case that uses a first-order Huffman code. Accordingly, high-fidelity images whose signal-to-noise ratio (SNR) is greater than 50 dB with rates less than at 1.653 bits/pel are obtained. © 1997 Scripta Technica, Inc. Electron Comm Jpn Pt 1, 80(3): 47–57, 1997

Perspective for super-high definition image systems

The authors are developing a super-high-definition image system with the aim of integrating all existing media without any distinction between still and moving images. This article describes JPEG and MPEG-2 as compression encoding methods required for the efficient transport and storage of SHD images with their vast amounts of data, and relates the results of investigations of their characteristics. While the characteristics of such encoding algorithms depend on the nature of the image data, using enhanced MPEG-2 algorithms on SHD images can compress a 6 Gb/s original to 150 Mb/s with nearly no loss in quality. The authors also point out the technical issues involved in implementing a system for SHD moving images and describe their actual approaches.

Super high definition image coding using wavelet vector quantization

A method of coding super high definition (SHD) still images based on vector quantization of wavelet coefficients is proposed. A compression scheme for SHD images should achieve data compression without any visible picture quality deterioration. We demonstrate that the proposed method meets this requirement. In this coding technique, each vector of wavelet coefficients is coded by a series of vectors of decreasing magnitudes, resulting in a successive approximation process. It also exploits the structural similarities among the bands. This provides efficient coding together with the ability to guarantee arbitrary distortion levels for each band, which can be exploited to achieve subjectively optimum performance. Conventional image compression techniques such as transform, sub-band, and vector quantization have already been tested for the coding of SHD images. Simulation results show that the proposed method outperforms the other SHD image coding methods reported in the literature.

Special Issue Image Technology of Next Generation. Film-based Motion Picture Digitizing System for Super High Definition Images.

Special Issue Image Technology of Next Generation. Film-based Motion Picture Digitizing System for Super High Definition Images.

Hierarchical sub-band coding of super high definition image with adaptive block-size multistage VQ

A hierarchical image coding algorithm based on sub-band coding and adaptive block-size multistage vector quantization (VQ) is proposed, and its coding performance is examined for super high definition (SHD) image. First, the concept on SHD image is briefly described. Next, the signal power spectrum is evaluated, and the sub-band analysis pattern is determined from its characteristics. Several quadrature mirror filters are examined from the viewpoints of reconstruction accuracy, coding gain, and low-pass signal quality. Then an optimum filter is selected for the sub-band analysis. The two-stage VQ using the adaptive bit allocation is also introduced to control quantization accuracy and to achieve high-quality image reproduction. Coding performance and hierarchical image reconstruction are demonstrated using SNR and some photographs.

All-digital super high definition images

In this paper, we will present a survey of the all-digital super high definition (SHD) image specifications currently under development by the authors to support this type of media integration. We will discuss specification requirements, encoding and support technologies, and present a survey of signal processing systems. Especially, we will focus on the NOVI-II experimental system which was created to develop signal processing architectures for all-digital SHD image processing, as well as to evaluate compression schemes for SHD images. Of course, any discussion of media integration cannot fail to touch on hypermedia, so we will also examine the relationship of hypermedia to super high definition images.