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Displaying 1-10 of 10 articles from this issue
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Article type: Cover
Pages Cover1-
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (16K) -
Article type: Index
Pages Toc1-
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (44K) -
Shigeyuki Sakazawa, Yasuhiro Takishima, Tetsushi Yamashita, Masahiro W ...Article type: Article
Session ID: MIP'99-60/NIM'99-86
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper proposes a design of a new AV transmission system focused on IP network environment. The system is capable of MPEG-2 video encoding and storing as well as transmitting it through IP networks without throughput degradation even in high-delay links such as satellite or international channels. This store-and-forward operation overcoming all the other problems of IP network transmission is further fortified in a prototype system by background operation and distance administration functions.View full abstractDownload PDF (830K) -
Ryoichi KAWADA, Shuichi MATSUMOTOArticle type: Article
Session ID: MIP'99-61/NIM'99-87
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe conventional full-redundant duplicate transmission scheme, which is often adopted in video transmission that requires high reliability such as contribution and primary distribution, has a drawback in that the efficiency of utilization of transmission links is low. In order to improve this, it would be effective to realize "flat multi-scalable video transmission", in which the picture can be reconstructed by using any single channel, while combining more than one channel leads to the reconstruction of the picture with even higher quality. In this paper, for this purpose, the authors propose a "complementary sampling method". In this method, the improvement in picture quality is achieved by canceling out the coding noise which is included in more than one channel. Moreover, it is shown that in this scheme, the objective assessment of picture quality can be performed based only on the received pictures. The authors hope that this study will help to construct a visual communication system with high efficiency and high reliability.View full abstractDownload PDF (771K) -
Akio Yoneyama, Yasuyuki Nakajima, Hiromasa Yanagihara, Masaru Sugano, ...Article type: Article
Session ID: MIP'99-62/NIM'99-88
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSMPEG has became an important technique for various video handling. Since the MPEG video coding standards specify only bitstream syntax for a compressed video, a number of algorithms have been proposed in order to improve the picture quality. In this paper, we propose an MPEG video coding algorithm fully adaptive frame/field structures and GOP structures and show that the proposed method can greatly improve the coding efficiency when compared with a fixed coding structure case.View full abstractDownload PDF (780K) -
Isao NAGAYOSHI, Hiroyuki KASAI, Hideyoshi TOMINAGAArticle type: Article
Session ID: MIP'99-63/NIM'99-89
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSAs the transform method of video bitstream to the required bitrate, the video transcoder is adopted to various applications. In this paper, we focus on the MPEG video transcoder with the requantization in DCT domain, and propose the rate control method for the MPEG video transcoder considering the estimation of the drift-error propagation. First, we show the transcoder architechture with the calculation of "Drift-Error Propagation Ratio". Next, we explain proposed rate control method with minimization of Requantization-Error and Drift-Error. Last, from the simulation, we show the effectiveness of proposed rate control method in comparison to the traditional rate control method in terms of complexity, buffer size, picture quality.View full abstractDownload PDF (795K) -
Xiaohua ZHANG, Masayuki NAKAJIMAArticle type: Article
Session ID: MIP'99-64/NIM'99-90
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe rapid expansion of multimedia techniques has made stereo display systems more prevalent than ever. Due to the insufficiency of stereoscopic image sources, peoples are endeavoring to generate stereo images. In this paper, we present a new approach for creating stereo images from monocular video data. The approach is adaptable to video data with not only horizontal motions, but also arbitrary 2D motions. This approach does not need 3D reconstruction. We use a hierarchical strategy to estimate the motion of image structure. After motion estimation, each pixel in the image is shifted to synthesize a new image which can be formed a stereo pair with on of the original image. The shifting distance of each pixel is decided by the scalar norm of motion vector at each pixel point.View full abstractDownload PDF (1177K) -
Hussein Karam, Masayuki NAKAJIMAArticle type: Article
Session ID: MIP'99-65/NIM'99-91
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSHausdorff dimension is an important quantity for characterizing both of the geometric structure of chaotic attractor sets and the data texture in a large number of physical and biological sciences. The problem of estimating the Hausdorff dimension of chaotic attractors, profile or an image patterns is more difficult and devious than theory suggests. Many different methods have been proposed for estimating the Hausdorff dimension. The most popular methods are the Box-counting and the correlation methods. The major problems of these methods are that, the calculation of Hausdorff dimension is limited by large memory and time requirements. Moreover, these methods leads to results with a very high percentage of error. This paper recovers such problems by manipulating the computation of the correlation method with a new algorithm, which we will call Box-neighbor correlation algorithm. The proposed technique is efficient in time computation, relatively easy and converges rapidly. Moreover, it can be applied in many different application fields such as medical imaging because of its optimal speed and its use of a less storage memory.View full abstractDownload PDF (906K) -
Akira SUZUKI, Akio SHIO, Hiroyuki ARAI, Sakuichi OHTSUKAArticle type: Article
Session ID: MIP'99-66/NIM'99-92
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper describes a method that can improve the visibility of features in shadowed regions in aerial images while retaining the quality of non-shadowed regions. The method first calculates the probabilities of each pixel belonging to shadowed class and non-shadowed class using color features from a smoothed image made with a morphological filter, and then compensates the intensity and saturation of each pixel according to the probability of its belonging to the shadowed class. Experimental results indicate that the accuracy of the proposed classification is about 95%, and that it improves the visibility of shadowed features while retaining the quality of non-shadowed regions.View full abstractDownload PDF (1302K) -
Article type: Appendix
Pages App1-
Published: August 26, 1999
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (87K)
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