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Article type: Cover
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Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Article type: Index
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Published: February 04, 2003
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Kiyohito TOKUDA, Shoichi NAKABAYASHI, Takashi OHYAMA
Article type: Article
Session ID: HIR2003-41/ME2003-41
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Inter-Vehicle Picture Communication (IVPC) system for instantaneous picture transmitting is developed based on Dedicated Short Range Communications (DSRC) type Inter-Vehicle Communication (IVC) system which is studied on Intelligent Transport Systems (ITS). This paper describes evaluation of transmission time from actual field test. It is clarified that IVPC system has possibility of practical use.
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Hitoshi YAMAUCHI, Hiromitsu TAKAHASHI
Article type: Article
Session ID: HIR2003-43/ME2003-43
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Recently, methods and techniques for ITS are researched actively. Many road environment detection systems that assists drivers' judgement and makes up oversight of road environments are proposed. In many of these systems, recognition of road signs are achieved by resizing image and employing template matching. Though, resizing image will reduce it's quality, and will cause the system to fail in matching. In this paper, a recognition method based on vectors is proposed. After calculating of vectors on each pixel, outline vector lists are generated by tracing the vectors. Then, signatures of the image are generated from detected outline vector lists. Recognition is processed by matching these signatures to template signatures using string matching technique.
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Takeshi KAJIYAMA, Wataru MITUHASHI
Article type: Article
Session ID: HIR2003-44/ME2003-44
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Two problems must be solved in order to estimate the motion of an uncalibrated camera between two viewpoints. One is the determination of the camera's parameters and the other is the correspondence matching of features in images taken at different positions. In this paper, we propose a new technique to extract corner structures automatically in an image and then match the features between two images. The method proposed incorporates the correct matching of the image corners in a unified algorithm for camera calibration and motion estimation.
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Mei KODAMA, Masashi MURASAKI
Article type: Article
Session ID: HIR2003-45/ME2003-45
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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We had already proposed "Multimedia Scalability Package:MSP" as structure data in integrated multimedia services. In addition, we studied telelecturing system using MSP data. In this system, proceeding data and video data are used, and MSP function operates these data, play, edit, transmit and so on. We propose a video transcoding method for information updating over network to select high resolution or low resolution video. Moreover, a video contents delivery system is indicated using MSP contents. We consider contents tranmition and transformation methods based on MSP data. Especially, transformation methods are explained and these procedures are shown. By simulation results, it is efficient for users to play multi resolution video contents.
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Shinji KUNITANI, Kenji KOBAYASHI, Wataru MITSUHASHI
Article type: Article
Session ID: HIR2003-46/ME2003-46
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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A new configuration of spatial localized reticles is proposed for applications in real-time object tracking task. While the proposed method is based on spatial filter velocimetry, the motion of a planar object in a three-dimentional environment is decomposed into global affine-motion parameters in the image plane. Global affine-parameters, such as translation, dilation, rotation, and shear can be isolated and identified by measuring the temporal frequency of the reticles arranged on concentric circles in the image plane. Experiments were performed in order to maintain the size and the position of the object's image by controlling the attitude of a camera on the basis of the estimated motion parameters. The proposed system, composed of only a commercially available PC, exhibited good tracking performances with processing rate of 15 frames per second.
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Ryohei OGUSHI, Shinichi TAKAGI, Akihisa KODATE, Hideyoshi TOMINAGA
Article type: Article
Session ID: HIR2003-47/ME2003-47
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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As the elemental technique for partial match retrieval and identifying illegal using of the partial image,it is essential to identify quickly the implication relations between an original image and its partial image. Therefore,this paper proposes the method of identifying the subsumption relations between two images using region features and pattern matching. In this paper,only scaling of partial image is changed. As the first step,we estimate partial image's scaling and location in the original image to reduce the pattern matching computations.In the second place,comparing the two images around estimated scaling and location using histogram intersection,we calculate the similarity of them. At Last,considering the similarity,we identify the implication relations.
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Yohei HAMADA, Shingo ANDO, Masato NAKAJIMA
Article type: Article
Session ID: HIR2003-48/ME2003-48
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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When we take a picture against the light, we get black out or white out effected picture. Usual camera has anarrow dynamic range, so this effect is caused. We are developing a camera preventing black out and white out effect with using under and over exposed images. Two images are compounded partly to reject black out or white out parts. The compounded image has a good view of dark area and bright area. We could prove this algorism is available to develop the camera that can take pictures without black out or white out effect.
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Kaoru SUGITA, Takeshi NAEMURA, Hiroshi HARASHIMA
Article type: Article
Session ID: HIR2003-49/ME2003-49
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Recently, graphics processing units (CPUs) have programmable components called "programmable shaders." The aim of this paper is to realize a real-time image processing platform using such CPUs. It is possible to accelerate the image processing tasks and realize more advanced interactive applications on personal computers. In this paper, we examine technical requirements for applying CPUs to image processing tasks. The proposed image processing platform integrates a lot of techniques for utilizing unique functions on CPUs. Users can easily develop several image processing applications using our platform. This paper presents bridging efforts between graphics rendering and image processing.
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Chihiro HARADA, Masakazu MORIMOTO, Kensaku FUJII
Article type: Article
Session ID: HIR2003-50/ME2003-50
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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It is difficult to extract a precise shape of object automatically from an image which is taken in an environment with no limitation (e.g. object's kind can't be specified, the camera isn't fixed, many movement objects exist in the background, and so on.) In this paper we present the precise object automatic extraction algorithm for such difficult scene. By use the color information of reference image and disparity map estimated from a stereo image, we realize a high precision object automatic extraction even if the background color is similar to the object color or there are no textured regions. And, we examine about the influence on the extraction precision with planning the simplification of the system by using a low resolution camera for one of the stereophonic cameras.
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Go KOSHII, Yuki OSAKI, Shinichi TAKAGI, Akihisa KODATE, Hideyoshi TOMI ...
Article type: Article
Session ID: HIR2003-51/ME2003-51
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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This paper proposes the efficient video mosaicing method of high resolution image generated from a video sequence with zooming-in and scanning operations. By zooming-in and scanning operations, synthesized image of arbitrary resolutions can be generated theoretically, although the distortion caused by cumulative errors degrades the picture quality of mosaiced image very heavily. As a solution of this problem, we have newly developed a video mosaicing method based on the following information: 1. Reference image, 2. Coverd area by Camera 3. Camera position. In this paper, followed by the description of concept and algorithm of our method, some experimental results are also discussed.
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Kiyoaki SAWAI, Shin-ichi MURAKAMI
Article type: Article
Session ID: HIR2003-52/ME2003-52
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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This Paper describes an action recognition method from motion pictures picked up by a single TV camera. In This method 2D-Feature points such as a head top, shoulder edges, hands and so on are extracted and matched with the reference data of a 3D model.Under the hypothesis that an object person stands on a floor, the position of the above feature points of an object person can be estimated by a triangulation. Through these processes ,the human actions can be analyzed.
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Yogendra Trihan, Toshihiko Misu, Masahide Naemura, Yoshinori Izumi
Article type: Article
Session ID: HIR2003-53/ME2003-53
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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The rapidity with which digital information, particularly video, is being generated by broadcast networks world over has necessitated the development of tools for compact representations of such media. In this paper, we propose a method to obtain compact visual representations for Human postures. The novelty of our technique is its ability to cope with Human postures in terms of both scalability and variability. Our algorithm uses a combination of contour analysis and skeletonization to obtain compact data for semantic descriptors of such visual information. These compact data can be used in limited bandwidth applications.
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Takasi YAHARA, Junji MAEDA
Article type: Article
Session ID: HIR2003-54/ME2003-54
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Humans generally focus on a few areas in an image rather than scan all areas of a scene. Extraction of perceptully important regions is useful for a wide applications such as object recognition, image compression and machine vision. We present a method to automatically produce an importance map, that predicts the perceptual importance for each segmented region in the image, using various factors which influence human visual attention. We used region growing algorithm as image segmentation technique. By using fuzzzy inference to develop an importance map, we obtained the results that coincide with human sence.
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Tomoya ISHIDA, Miki HASEYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2003-55/ME2003-55
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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This paper presents a novel approach to texture analysis using the features which are based on a multiscale analysis. Since edges or line elements in an image have been utilized as texture elements in the traditional approach, they cannot accurately analyze contaminated images by blur, additive noise, etc. In the proposed method, features of convex and concave surfaces obtained by applying Gaussian niters are defined as texture elements. Even when the texture images including the contamination are observed; the proposed method can provide the accurate analysis results, since the elements are robust against the contamination. Therefore, some experimental results are shown for the high performance of the proposed method to be verified.
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Kazunori MORI, Junji MAEDA
Article type: Article
Session ID: HIR2003-56/ME2003-56
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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We present the segmentation method of color images which controls an excessive partition. Segmentation of images including both man-made objects and natural objects sometimes produces the excessive partition due to the texture regions such as trees, leaves and walls. The purpose of the proposed method is to provide rough segmentation of texture regions in natural objects while maintaining precise segmentaion of important edge regions in man-made objects. The experimental results demonstrate the effectiveness of the proposed method in comparison with the conventional method.
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Hiroki MIURA, Hiroshi TSUJI, Junji MAEDA
Article type: Article
Session ID: HIR2003-57/ME2003-57
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Various factors such as noise and miscellaneous small features that obstruct proper image segmenation generally exist in an image. We extend an anisotropic diffusion algorithm combining morphology to color images, that is an edge-preserving smoothing for grey scale images, as pre-processing of segmenting color noisy images. We improve a morphology filter by using new structuring elements and propose to select each element according to edge information. The proposed method shows the capability of providing good pre-processing for color noisy images.We also make a try to determine the diffusion coefficient and the number of diffusion automatically.
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Satoshi UEMURA, Miki HASEYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2003-58/ME2003-58
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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This paper presents a novel expansion technique for self-affine fractal objects using Extended Fractal Interpolation Functions (EFIF). When EFIF is applied to a given object, the map parameter, which play a significant role to represent the object, must be determined by solving the inverse problem. However, the inverse problem concerned with the expanded object which associates with the given object cannot be solved, since the expanded object includes unknown data which must be interpolated. Therefore, in this paper, we demonstrate a flexible property that the map parameter concerned with the expanded object can be simply described by using those concerned with the given object. Using such flexible property in our EFIF, a given self-affine fractal object can be easily expanded with an arbitrary rate.
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Keiko KONDO, Miki HASHYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2003-59/ME2003-59
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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The conventional impulse detection methods tend to work well for fixed-valued impulse noise but poorly for random-valued impulse noise. This paper proposes an impulse detection method which can accurately detect both fixed-valued and random-valued impulse noise. The proposed method consists of two systems. The first system detects the impulse noise by considering the difference between the intensity of a target pixel and the output of the median filter. The second system verifies whether the noise detection results obtained by the first system are correct. By using these systems, the proposed method can accurately detect both the types of impulses and can be effectively used as a preprocessor for noise reduction filtering.
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Atsushi MATSUMURA, Miki HASEYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2003-60/ME2003-60
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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This paper presents a novel method for retrieving binary images by using a binary tree. In the proposed method, a binary tree, in which each leaf has a group of the images belonging to the database, is used. To retrieve the desired images, the tree is traced by comparing the similarities between the input image and the images which correspond to the leaves in the tree, and then the group, which corresponds to the reached leaf in the tree, of the images to be displayed for the user is determined. Moreover, the proposed method uses training and reclustering. The training assigns the Weights to the partial features based on the similarity between the input image and the desired image, and after training, the desired image is reclustered. By these methods, the time for the computation of the similarities to retrieve the desired images is decreased.
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Hideaki TAMORI, Naofumi AOKI, Tsuyoshi YAMAMOTO
Article type: Article
Session ID: HIR2003-61/ME2003-61
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Most robust digital watermarking, which is based on orthogonal transform, has high security because signature data is embedded in the domain of transforms. We have suggested watermarking techniques based on the number theoretic transform which is a type of orthogonal tranform. The number theoretic transform can be calculated without round-off error and has fragile nature of coefficient. In this paper, we introduce fragile and lossless watermarking techniques using the characteristics of the NTT.
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Rong HOU, Naofumi AOKI, Yoshinao AOKI
Article type: Article
Session ID: HIR2003-62/ME2003-62
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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In recent years, biometrics has been arising as a technique for user identification. Biometrics employs user's biological characteristics, such as fingerprint, face, and DNA, as ID. In order to apply this technology safely, it is necessary to guarantee the certainty of biometrics data. Digital-watermarking technology has been proposed for this purpose. This technology is used basically for embedding copyright information imperceptibly into digital contents, in order to protect the contents from malicious use. In this study, a robust digital watermarking technique is proposed for the protection of fingerprint image.
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Kousuke MATSUMOTO, Naofumi AOKI, Yoshinao AOKI
Article type: Article
Session ID: HIR2003-63/ME2003-63
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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In this paper, we propose a new watermark technique, where we embed two kinds of watermark data into DCT coefficients of JPEG images. The first watermark data is a series of compressed binary data related to great and small relations of the coefficients of JPEG image. The second watermark data is a side information. Those two kinds of watermark data are embedded into the low frequency region of DCT. We confirm the validity of proposed method, where we can restore the original clear image by using user's Key from the embedded unclear image. Moreover, we consider the application to MPEG.
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Shigehiko WATABE, Masaru KAWABATA, Hidetoshi MISHIMA, Fumio HASEGAWA
Article type: Article
Session ID: HIR2003-64/ME2003-64
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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All over the world, digital broadcasting services are starting, high-speed network is spread.But it is essential to construct efficient contents creating environment, and recycle the former cortents effectively for providing so many programs. Therefore we expand to digital watermark data for editing operation in addition to it. We present that we watermark a time code from an original tape (or cassette). This information is useful to administrat e many contents in the archives. Further more, we present the contrivance that by using the watermarked time code, we are able to keep recycled MPEG picture quality with editing video stream..
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Haruo HIKI, Kyohei SATO, Manabu ITO, Fumio HASEGAWA
Article type: Article
Session ID: HIR2003-65/ME2003-65
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Content production using video materials in an archive becomes more efficiently for the time and cost than taking new shots. However it is difficult to find an appropriate material among many materials stored in the archive. So new retrieval method is required. We studied MPEG-7 description for moving pictures in order to retrieve such video materials efficiently. Two elements, representative still-picture and explanatory sentence, are considered. This paper describes the experimental result of the retrieval using these elements and effective description method for Internet editing.
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Kota NAKAHIRA, Isao NAGAYOSHI, Tsuyoshi HANAMURA, Hideyoshi TOMINAGA
Article type: Article
Session ID: HIR2003-66/ME2003-66
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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In a network that has the protocol performing congestion control of TCP etc..., the amount of transmitted data to a network is restricted to some extent by congestion control, when a lot of packets are passed at a certain time and the bandwidth decrease temporarily. This phenomenon appears as a decrease of the processing speed for transcoder. By using such character, the bandwidth estimation technique completed only by transcoder is established.
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Hiroshi SAKURAI, Naofumi AOKI, Kazuyuki YAMAMOTO, Yasunobu NITADORI
Article type: Article
Session ID: HIR2003-68/ME2003-68
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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This research objective is to investigate about the fundamentals on the possibilities of embedded ubiquitous computing and its application development. In this research, hardware platform is developed to construct the environment for ubiquitous computing.
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Megumi TAKEZAWA, Miki HASEYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2003-69/ME2003-69
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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In fractal image coding, it is actually impossible to find the optimal IFS parameters, which provide the highest quality reconstructed image, by minimizing the error in the reconstructed image because of heavy computation. Hence, most of the fractal image coding determines the suitable IFS parameters by minimizing the error in the collage image instead of the reconstructed image in short time. However, these obtained IFS parameters do not necessarily provide a high-quality reconstructed image whose error is small. Therefore, in order to obtain the high-quality reconstructed image, we have before proposed a fractal image coding method which can find the optimal IFS parameters in low computational costs by using a genetic algorithm and simulated annealing. In this paper, to achieve further reduction in its computational costs, our previous method is improved by adopting a new procedure.
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Masashi MURASAKI, Mei KODAMA, Kazufumi KANEDA, Hideo YAMASHITA
Article type: Article
Session ID: HIR2003-71/ME2003-71
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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A scalable bitstream syntax currently is used to realize the scalable video requirement. Compared with non-scalable video decoder, a much more complex video decoder is need to decode scalable bitstreams. However, it is considered that a video decoder should implement as simple as possible to play some quality video which users want. From this view point, a scalable video coding scheme by updatable bitstream is proposed to realize the scalability without scalable video decoder. In this paper, we pay attention to spatial updatable scalability and explain this algorithm. Finally, our proposed method is evaluated from simulation.
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Shoko IMAIZUMI, Hitoshi KIYA
Article type: Article
Session ID: HIR2003-72/ME2003-72
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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A method is described for efficient partial-scrambling of JPEG2000 images that avoids generating marker codes and improves the ability to control the degree, strength, and computational complexity of scrambling. This higher control ability is due to the use of a parameter. This parameter also controls the scrambling time, an important consideration for real-time proccessing.
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Yasuharu OKAMOTO
Article type: Article
Session ID: HIR2003-73/ME2003-73
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Today, the cellular phone has spread especially. The feature of a cellular phone is that we can use it anywhere and anytime. In future, it is thought that "Ubiquitous Computing"(There are many computers everywhere and anyone can use them) and "Wearable Computing"(Users wear small and light computers, and they can use computers more comfortable) will spread instead of Mobile Computing. This paper proposes the input-and-output system using CyberGlove which sensors perceive the motions of fingers.
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Satoshi YONEMOTO, Hiroshi NAKANO, Rin-ichiro TANIGUCHI
Article type: Article
Session ID: HIE2003-74/ME2003-74
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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This paper describes an real-time interaction system which enables 3D direct manipulation. Our purpose is to do seamless mapping of human action in the real world into virtual environments. With the aim of making computing systems suited for users, we have developed a vision based 3D direct manipulation interface as smart pointing devices. Our system realizes human motion analysis by 3D blob tracking, and human figure motion synthesis to generate realistic motion from a limit number of blobs. For the sake of realization of smart interaction, we assume that virtual objects in virtual environments can afford human figure action, that is, the virtual environments provide action information for a human figure model, or an avatar. Extending the affordance based approach, this system can employ scene constraints in the virtual environments in order to generate more realistic motion. We have also developped a virtual camera control mechanism using physical motions.
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Thitiporn LERTRUSDACHAKUL, Akinori TAGUCHI, Terumasa AOKI, Hiroshi YAS ...
Article type: Article
Session ID: HIR2003-75/ME2003-75
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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With the recent broadband telecommunications networks, there has been a corresponding expansion in a videoconferencing system. It can be realized that the eyes of users are an important cue for a decision making process and in increasing the feeling of presence between participants in a videoconference meeting. In addition, simple user interface such as pointing is also considered to be a significant part to improve the efficiency of a conference. In this paper, we propose a multiparty videoconference for IshinDenshin System; a videoconferencing system in which participant's image and shared workspace are naturally merged. The synchronous pointing and gaze communications for multiparty videoconference of IshinDenshin System will be described.
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Fumio SUMI, Masayuki NAKAJIMA
Article type: Article
Session ID: HIR2003-76/ME2003-76
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Creating an animation sequence needs tremendous workloads and talented animators to specify and control motions. But it is very popular to make completely new animation without reusing existing sequences of animation. One of the reasons is the difficulty of retargeting the motion to the other models and deformation of the model shapes. If it is possible to provide the animation database, we can efficiently produce a new animation sequence using existing sequences. There are many research works in retargeting the motion data captured from motion capture system, but those are almost for 3D computer animation and there is none of the works in 2D animation.We propose a standard 2D animation database system, in which there are model data with motion in reusable form, and utility tools for deformation of model shapes and motions. We develop such techniques implemented in the tools as making reusable form of model shapes by vectorization, and educing motions from input bitmap images.
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Yuusuke Koine, Jin Hou, Yoshinao Aoki
Article type: Article
Session ID: HIR2003-77/ME2003-77
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Non-verbal language plays an important role in interactive human communication. It is the best efficient way to communicate feelings, and especially helps understanding between cultures. We have previously proposed a new conception, avatar language, to describe various non-verbal behaviors around the world. We have made investigations into the way of 3-Dimentional Avatar Chat System on the Internet and Web Browser with VRML Plugin. And We developed the Online Avatar Language Dictionary System with CGI and VRML technique in the process of that 3-D Avatar Chat System.
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Masaki KURITA, Yousuki YAMADA, Naofumi AOKI, Yoshinao AOKI
Article type: Article
Session ID: HIR2003-78/ME2003-78
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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Today the internet uses a lot of text, pictures, videos, animations, etc. to communicate eachother. In this article, we expose the Communicating System using Avator that is easy to make, easy to move, and easy to communicate for everyone. We made two types of 3D models based on MPEG-4 facial animation parameters. One is real face model, the other is a ANIME-model. We will make a database of human emotions that will contribute to easy making facial 3D animation.
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Xuejun LIU, Yoshinao AOKI
Article type: Article
Session ID: HIR2003-79/ME2003-79
Published: February 04, 2003
Released on J-STAGE: September 20, 2017
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This Study has developed Avatar Language Databases that can be employed for a network environment share. This Study also developed an Avatar Language Management system. Drawings into the XML Techniques We establish the database of Avatar Language and realize the Connecting of each other of different element database basing on SVG generate Motivation.
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Article type: Appendix
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Published: February 04, 2003
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Article type: Appendix
Pages
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Published: February 04, 2003
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