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Article type: Cover
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Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Article type: Index
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Published: January 30, 2002
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Takuma NAKAMORI, Naoto ISHIKAWA, Masato NAKAJIMA
Article type: Article
Session ID: HIR2002-19/MIP2002-3
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Our purpose is to prevent the rear-end collision of the vehicle, and propose a novel technique for a front-vehicle observation system using sequence of road images. In this research, we have developed the in-vehicle system that can be applied to real-time operation in a software-base using the algorithm with low calculation cost. In our method, we calculate projection conversion (a road surface is changed into the image seen from right above) of the vehicle's front image from the vehicle's front images taken by the single camera placed on the dashboard of our vehicle. Next, the difference of two projection conversion images calculated. Finally, we calculate degree of crushing risks depending on distance to front vehicle and running velocity of our vehicle, and give the warning to a driver. This system mounted on a vehicle has been tested in actual on expressway. As a result, the effectiveness of our method is verified.
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Hiroaki HASEGAWA, Noriyoshi OKAMOTO
Article type: Article
Session ID: HIR2002-20/MIP2002-3
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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In this paper, the detection method of closer front vehicle on a traffic lane is discussed. Then if preparation of a road infrastructure can come true, extraction of a traffic lane may be more simplified. And we premise that a vehicle can be detected. In experiments using the proposed method, for input image deleted color information of a road, boundary lines can be extracted and the vehicle region is detected by using the horizontal scanning. And we discuss about obtained detection accuracy. Next the prediction method of the dangerous scene based on the variance of vehicle size inter frames is investigated.
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Takashi MORIYA, Naoto ISHIKAWA, Masato NAKAJIMA
Article type: Article
Session ID: HIR2002-21/MIP2002-4
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Numerous car accidents occur on urban road. However, researches done so far on driving assistance are subjecting highways whose environment is relatively simple and easy to handle, and they do not deal with urban settings. Our purpose is to extend its support to urban traffic environment. In our system, stereo cameras are set in front of a vehicle and the captured images are processed through a computer. We create a projected Disparity Map from stereo image pair. With a speed meter and a steering sensor, observation-required area, is set within a projected disparity map. The method has been tested in urban traffic scenes and has shown to be effective for judging dangerous situation, and gives proper alarm to a driver.
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Takeshi TAKAHASHI, Akira NAKAGAWA, Kiyoshi SAKAI, Kiichi MATSUDA, Hide ...
Article type: Article
Session ID: HIR2002-22/MIP2002-4
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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In delay sensitive audiovisual applications such as sports relay or remote monitoring, it is required to suppress the end to end delay as small as possible. Especially, when video compression coding is associated, buffering of coded bitstream is the dominant element in low-bitrate communication of about hundred kbps. The buffering delay can be reduced by minimizing the size of bitstream buffer, however, it may introduce severe degradations in decoded imaged or collape of buffer in the worst case. In this paper, we propose a new scheme using Dynamic Resolution Conversion scheme included in the MPEG-4 ARTS profile and realizes a low delay audiovisual communication with improved image quality. In computer simulation experiments, we compare proposed scheme using ARTS profile to conventional scheme using simple profile in the view of subjective audiovisual quality, and objective statistics. Our conclusion indicates the effectiveness of proposed Dynamic Resolution Conversion scheme in low-delay MPEG-4 Communication System.
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Shinichi SAKAIDA, Osamu MIZUNO, Nagato NARITA, Hiroyuki IMAIZUMI, Yosh ...
Article type: Article
Session ID: HIR2002-23/MIP2002-4
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Digital terrestrial television broadcasting (DTTB) and digital terrestrial sound broadcasting (DTSB) in Japan will be started in 2003. DTTB and DTSB will provide new video services for mobile receiving equipment. These services will use low bit-rate video encoding systems such as MPEG-4 video standard. Since the quality of low bit-rate video will be lower than that of the former high-definition television systems, the encoding parameters such as frame rate and image size must be chosen so as to optimize subjective quality. We describe the procedure for setting encoding parameters based on the results of the subjective quality evaluation of low bit-rate video.
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Mei KODAMA
Article type: Article
Session ID: HIR2002-24/MIP2002-4
Published: January 30, 2002
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 telecturing 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 consider remote control methods based on MSP data. Especially, transformation methods are explained and these procedures are shown.
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Hidekazu TAKAHASHI, Mei KODAMA, Kazufumi KANEDA, Hideo YAMASHITA
Article type: Article
Session ID: HIR2002-25/MIP2002-4
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Today, we often use the video data in user personal equipment in multimedia communication services. Therefore, we consider the matching method of using the temporal characteristics in video searching system. In this paper, we pay attention to the feature of local area and make use of the correlation value of the histogram in luminance signal between current frame and next frame. In addition, we propose matching algorithm the grouping correlation value by threshold and matching time can be short. Finally, our proposed method is evaluated from the viewpoint of matching time and matching precision.
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Keiko KONDO, Miki HASEYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2002-26/MIP2002-4
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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This papaer proposes a new noise-detection method for restoration of images corrupted by impulsive noise. Restoration methods, which consist of an impulse detection and a noise filtering, remove the impulsive noise from corrupted according to the results of the impulse detection. Therefore, a more improved impulse detector is required for more accurate image restoration. The proposed method verifies whether each pixel once detected as an impulse is a noise or not. By using the proposed method, high accurate detection results can obtained.
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Satoshi UEMURA, Miki HASEYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2002-27/MIP2002-4
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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This paper presents a novel representation method for contour shape using Fractal Interpolation Functions (FIF). In the traditional idea of the FIF, the scope of its application has been limited to the case where the signal is represented by single-valued function. Therefore the traditional FIF cannot be applicable to multiple-valued signals. This proposed method can model a multiple-valued signal with an extended FIF derived by introducing new parameters to the traditional one. Furthermore the fractal dimension known as a measure of complexity is used to determine the parameters needed by the FIF and thereby the signal can be modeled based on its complexity. Experimental results show the validity of the proposed method.
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Mitsushige YAMAMOTO, Tomokazu SATO, Naokazu YOKOYA
Article type: Article
Session ID: HIR2002-28/MIP2002-4
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Pyrotechnicians must determine many factors such as timing, music, and places in the production of a fireworks show. However it is difficult to produce the show efficiently because the results of production can not be easily confirmed in a real environment due to the cost and danger. This paper proposes a fireworks production support system that realizes an efficient work for fireworks production. In this system, user this inputs information about fireworks types, launch positions and timing, and music. The fireworks show is simulated by using input information, and is visualized in a panorama viewer and on an HMD (Head Mounted Display). Fireworks show can be produced efficiently with the low cost by using the proposed system.
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Masahiko INAMI, Naoki KAWAKAMI, Dairoku SEKIGUCHI, Atsushi YOKOYAMA, N ...
Article type: Article
Session ID: HIR2002-29/MIP2002-4
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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This paper proposes an adaptive optics for Head-Mounted Projector (HMP) using "X'tal Vision (Crystal Vision)" technology. X'tal Vision is a projection-based augmented-reality system, which is compose of a projector with a small iris and a retro-reflective screen. With this adaptive optics, we can place an image plane at any distance.
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Kaname TOMITE, Kazumasa YAMAZAWA, Naokazu YOKOYA
Article type: Article
Session ID: HIR2002-30/MIP2002-4
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Recently, the walkthrough which enables us to look around a virtualized real world has been widely investigated. The walkthrough system can be applied to simulation, telepresence, and so on. This papaer describes a method of interactive walkthrough which takes a real scene and enables us to look around in the virtualized scene. Our method is based on acquiring omnidirectional images at multiple points in the real world by using an omnidirectional camera. The method generates an omnidirectional image at an arbitrary location from captured omnidirectional images, and presents a user a converted perspective image. In the experiment, we made the walkthrough using indoor omnidirectional images and confirmed the feasibility of the method.
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Hikaru ITOH, Mutsuki NIKI, Kenzi Kudoh, Toshiaki KOBA, Takashi Kanamar ...
Article type: Article
Session ID: HIR2002-31/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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The image recognition system using multiplex resolution expression of wavelet transforms was proposed. Since processing a lot of data in real time was needed in the image recognition field, we realized it by the Hw/Sw consolidated system that combines the rapidity of hardware, and the pliability of software. The chip of wavelet transform implemented on a FPGA, will run 20times faster than the wavelet transform program on a processor (600Mhz, 128K, cache). Moreover, the validity of template matching by the multiplex resolution of wavelet transform was showed by the easy example.
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Takahiro MOCHIZUKI, Mahito FUJII, Takayuki ITO
Article type: Article
Session ID: HIR2002-32/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Image retrieval systems that allow a user to express a query as a simple sketch are being actively investigated. However, their graphical user interfaces to sketch have only simple drawing and painting functions provided by the facile iamge-drawing tools. Therefore, the use of such conventional systems can't achieve the high-precision and efficient image retrieval because it doesn't have no facility to put the textures reflecting DB's feature on the query image. We propose a flexible image retrieval system enabling the user to express his retrieval intent widely, by sketching a query with the texture images that are extracted in advance as the representative ones in iamge repositories by clustering their image features.
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Tadayuki TAYAMA
Article type: Article
Session ID: HIR2002-33/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Two experiments concerning velocity aftereffect and velocity contrast were carried out. The result for aftereffect experiment showed that perceived test velocity usually decreased with the velocity of adaptation pattern whose motion direction was the same as test pattern. However, the increment of perceived velocity was also observed in the same direction condition. The result for contrast experiment showed that perceived velocity decreased with induced velocity in the same direction but increased in the opposite direction. The difference between experimental results was explained by a model based on two temporal-frequency channels.
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Shigemasa SUMI
Article type: Article
Session ID: HIR2002-34/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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In the Johansson type of side-view PLWs (Point-Light Walkers), pendulum-like motions, hierarchically organized into the pattern of a human biological motion, give a vivid impression of an invisible human being. Although the pendulum-motion principle is not held in back-view condition, the PLWs show clear images of human gait, indicating 72% or more correct gender-identifications. Their age, however, was less accurately recognized. Motion coordination of the point-lights or rhythmical relation among them seems to be playing an important role in the perception of back-vlew PLWs.
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Ko NAKAMURA, Shigemasa SUMI
Article type: Article
Session ID: HIR2002-35/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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The purpose of this study was to identify the information with which we perceive animacy or inanimacy from the motion of a single object. 26 animations of single-object motion were made by a personal computer on the basis of various motions extracted from the locomotion of several kinds of animals and insects and the movements of various objects caused by gravity and rebound, which were recorded by a digital video camera. Those animations were presented to 45 women's junior college students who were instructed to rate each animation on a 1-7 scale in terms of animacy. Results showed that motion based on real animal locomotion was judged to be animated motion, and that the reasons for this judgment included many changes in direction of motion, motion against gravity and motion with negative accleration (i. e. motion in which the velocity was faster just after a direction change, then gradually slowed down).
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Hisaki NATE, Kenji SUSAMI, Toyohiko HATADA
Article type: Article
Session ID: HIR2002-36/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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When observing an stereoscopic display, we sometimes cannot detect 3-D structure of some objects not to be able to normal depth by binocular disparity. This phenomenon is called cardboard effect. We examined if reduction in card board effect is caused by displaying picture including motion parallax and binocular disparity. The picture of the column in the situation of cardboard effect being noted was displayed on the scree. We set three conditions by varying depth cues in the picture (Motion parallax (head movement)+disparity condition (MH+D), motion parallax (no head movement)+disparity condition (NMH+D), disparity condition (D)). The subject's task was to compare the curvature of the real column with the curvature of the column on the screen. The result showed that the subjective curvature of it in the HM+D condition and the NMH+D condition was larger than in D condition. This indicated that motion parallax caused reduction in cardboard effect.
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Atsushi KURAMOCHI, Akihiko SUGIURA
Article type: Article
Session ID: HIR2002-37/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Recently, person having a visual function defect has been increasing. As one of this cause, there are sight decline and color blindness by increasing an opportunity that is used computer attended with CRT display. If it is possible seeing display device without using sight corrected tools like glasses, it can get information without a sense of incongruity. In this study, we suggest method that sees display device without a load to visual function by revising the part of display rather than the part of visual. We report a result by the experiment.
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Takahiro OZAWA, Yosifumi SIMODAIRA, Gousuke OHASI
Article type: Article
Session ID: HIR2002-38/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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An evaluation method of overall picture quality on a display proposed by the previous study. The method was composed on the bases of the postulate that factors of impairment of picture quality were independent each other. But it was pointed out that there seemed to be mutual dependence between the factors. We examined by subjective experiments that whether gamma and minimum luminance have mutual dependence or not on picture quality. Evaluation pictures were made of HDTV test charts, which had different gamma and minimum luminance from the original test chart. As the results of the subjective evaluation, it was found that the impairment of picture quality for a picture had larger minimum luminance was assuaged when gamma shifted to lower values.
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Kengo ITAKURA, Wanqing SONG, Yoshifumi SHIMODAIRA, Gosuke OHASHI
Article type: Article
Session ID: HIR2002-39/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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A liquid crystal display has characteristics that picture quality is largely change with viewing angle. Among the factors of the phenomena, maximum luminance and minimum luminance changes and gamma were taken up and examined how they affected picture quality. Even though contrast has large effect on picture quality, it was shown that quality of a picture having larger luminance was better than that having lower luminance and the same contrast. Gamma which gave the maximum picture quality decreased and gamma range where picture quality was higher than the acceptable limit decreased its width, when maximum luminance decreased.
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Shin OOYA, Miki HASEYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2002-40/MIP2002-5
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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An optimization method of a genetic algorithm for the problem of scheduling nurses has been proposed. This method optimizes the performance index that includes the weighted sum of the objective functions. However, the optimal solutions to the nurse scheduling problem are very difficult to achieve when each objective function has a different dynamic range. Therefore, this paper proposes a novel method to set the weighting factor with the standard deviations of the objective functions. The proposed method makes it possible to adopt any objective function and to actualize a practical scheduling system.
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Kenji SUZUKI, Miki HASEYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2002-41/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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This paper proposes a method which improves a search algorithm using a genetic algorithm and simulated annealing for a correspondence problem. The previous method may get caught in a local minimum. Due to an improvement in the search algorithm the proposed method detects good genes of each locus in search process of the previous method.
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Megumi TAKEZAWA, Miki HASEYAMA, Hideo KITAJIMA
Article type: Article
Session ID: HIR2002-42/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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In the fractal image coding, it is significant to determine a suitable contractive mapping, because the mapping has a serious influence on reconstructed images. The traditional fractal image coding methods determine it by minimizing the error (collage error) between an original image and an image obtained by once applying the mapping to the original. Therefore, minimizing the collage error dose not correspond to minimizing the error between the original image and the reconstructed image, that is the image obtained by decoding in the fractal image coding. Hence, in order to obtain the high-accuracy reconstructed image, we propose a new criterion-based method by using GA and SA to determine suitable IFS parameters that represent the best contractive mapping. The proposed method always provide better reconstructed images than the other conventional methods.
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Syunpei ISHII, Somchart CHOCHAITAM, Masahiro IWAHASHI
Article type: Article
Session ID: HIR2002-43/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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In this report, we propose a new signal processing to perform multistage-decomposition of Lossless/Lossy wavelet for Lossless/Lossy signal compression. Filter characteristic of our proposed multistage-decomposition with Lossless/Lossy wavelet is the same as that of the conventional octave-decomposition Lossless/Lossy wavelet but coding performance of our proposed Lossless/Lossy wavelet is better because of reduction of errors generated from rounding operations. This is because our proposed Lossless/Lossy is required less number of rounding operations.
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Tatsuroh HAYASHI, Akihiko SUGIURA
Article type: Article
Session ID: HIR2002-44/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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A method is proposed to improve the SNR of important area when the moving picture can be separated into the important area and the non-important area. The method utilize the translation table which determine the Quantization Parameter from Importance instead of using Rate Control. In our experimental evaluations, the proposed method improved the SNR of important area compared with conventional method.
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Takamitsu OKADA, Takahiko FUJISAKA, Yoshio KOSUGE
Article type: Article
Session ID: HIR2002-45/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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In the method which measures vehicles position on the road by image sensor and two dimensional radar assuming that road face is flat, tracking accuracy deteriorates by bias errors of vehicles position caused by gradient of a road and error of sensor-oriented direction. This paper presents a vehicle tracking method which estimate three dimensional position and velocity by using image sensor and two dimensional radar. Three dimensional state estimation becomes possible by utilizing the approximation of observation model of these sensors. We confirmed that the performance of this method is hardly affected by undulation of the road.
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Nobutsugu MINAMOTO, Ryuichi MITSUHASHI, Masahiro SUZUKI, Issei SASAKI
Article type: Article
Session ID: HIR2002-46/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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In every winter season, chain traffic accidents often occur on highway in heavy snowfall area, such as in Hokkaido, caused by low driving visibiliti with heavy snowfall or strong snowstorm. Under such bad weather condition, drivers easily lose sight of sideline or centerline which is undistinguishable from snow covering the road surface. In this report, a highly intelligent traffic communication system and lane-maintaining system is proposed to a solution of the problem. The system supports both lane keeping control and also inter load-vehicle communication that may be invaluable for providing information about traffic jam and accidents or various warning signals. We discuss particularly here about the position sensing method based on estimation of direction of radio wave radiation using network analyzer imitating an array ntenna. Basic experiments held in a darkroom demonstrate good results.
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Yuichi MORIOKA, Shinya TERASHI, Kazuhiko YAMAGUCHI, Hiroshi NAGANAWA, ...
Article type: Article
Session ID: HIR2002-47/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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To prevent the growing number of car collisions occuring every year, this paper will introduce the Magnetic Marker Inter-Vehicle System (MMIV System) combining the 5.8GHz inter-vehicle communication and the PN coded magnetic marker system which uses on-road magnetic markers organized in a PN Sequence. Through experiments conducted inside tunnels and at intersections, by using this system along with RTK-GPS, stable positioning can be made possible, and high accuracy can be maintained. Also, in the field of communication, when two vehicles are out of sight, over 100m from each other, one inside the tunnel and one outside, the received power can be maintain at a -90[dBm] level and packet error rate was kept at 0. This experiment can be said to be a valuable first step in the next generation ITS.
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Hirokazu YOSHIZAWA, Ichiro MATSUDA, Susumu ITOH
Article type: Article
Session ID: HIR2002-48/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Road environment recognition is needed for a driver assistance system which is one of promising applications in the field of ITS (Intelligent Transport Systems). We previously proposed a detection method of preceding vehicles out of on-board camera sequences. In the method, an image of a road area in the current frame is predicted from the previous on using a roa plane model, and the regions where prediction errors become large are detected as the vehicles. However, it is difficult to detect a vehicle in the edge of a road, because the upper part of such a vehicle is not projected onto a predictable area. To cope with the problem, we employ a new 3D lane model which can represent 3D structure of guardrails, soundproof walls, and so on, for the purpose of magnifying the predictable area. Simulation results indicate that the model can correctly detect the vehicles in the edge of a road.
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Munenori SEKINE, Takashi ENOMOTO, Masahiko MIKAWA, Sakae CHIKARA, Koji ...
Article type: Article
Session ID: HIR2002-49/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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As vehicle operation management for transportation, we propose the Event-Triggered Vehicle Operation Management System. In this system, onboard unit sends some information to center when it detects some event (arrival, departure, passage) at the address for delivery or the designated point. This paper describes the results (event detection performance, communication cost, and system qualities) of the study applying prototype of this system to transportation business.
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Tetsushi NODA, Masaji MURANAKA, Ryouji IGARASHI, Akira NAGAO
Article type: Article
Session ID: HIR2002-50/MIP2002-6
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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We developed an localized information (POI) Provision System using a vehicle's route information. The aim of this system is to supply the most appropriate information timely for vehicle by matching TPO of the driver (information receiver) with requirement about information provision of the customers (information provider). In this paper, we show the Information Input System, that enable customers to register their desired information according to location and time of day for which information is desired, and we show Information Provision System, which server provides timely information to the vehicle in accordance with the current location and vehicle's Route information.
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Takaaki HASEGAWA, Akira FUKUDA, Keisuke HATANO
Article type: Article
Session ID: HIR2002-51/MIP2002-7
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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This paper describes Airport experiments on a baggage handling system by using 13.56MHz band RFID technology based on ISO18000-3. After a brief introduction the experiments are explained and results are shown. Both modes of 1 and 5 are simultaneously examined. Each tag has an IC chip driven by received RF power. Mode 1 adopts an antenna printed on the tag using print technology as the first trial in the world, while mode 5 is the first trial in the world, Each mode of problems to be solved and prospects are made clear.
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Takaaki HASEGAWA, Kiyohito TOKUDA, Kiyoshi MIZUI
Article type: Article
Session ID: HIR2002-52/MIP2002-7
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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This papaer describes driving assistance systems that inter-vehicle communication and radar systems provide, based on inter-vehicle communication technology from the viewpoint of services, systems, and applications. After simple classification of services, media, driving assistance systems, application examples are mentioned to promote this field.
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Yosuke ARAGANE, Yukari TSUJI
Article type: Article
Session ID: HIR2002-53/MIP2002-7
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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The rapid development of mobile telecommunication technology has made it commonplace to communicate, via various media, with people or machines either inside or outside the vehicle. To control the information resource, providing timing, and amount of information are important for using these devices comfortable. In this paper, we focused in information amount that divided into amount itself and depth of related information in consideration of cognition process and judgment process. To control the information amount, we proposed "content set system." And we develop a prototype system.
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Fumihide KOJIMA
Article type: Article
Session ID: HIR2002-54/MIP2002-7
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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This paper reports the outline of The 2^<nd> Workshop on ITS Telecommunications (ITST2001) held on Oct. 25^<th> and 26^<th> at Yokosuka Research Park (YRP ; Yokosuka, Kanagawa). This international workshop focusing the telecommunications technologies for ITS is sponsored by Communications Research Laboratory, Yokosuka Research Park R&D COmmittee, and Telecommunications Advancement Organization of Japan. ITST2001 includes one keynote address session, and 10 technical sessions to which 56 papers are totally contributed. Moreover, several technical demonstration of ITS telecommunications is exhibited in ITST2001 as well as ITST2000, the 1^<st> opportunity of this international workshop series. ITST2001 has attracted a great deal of attentions due to its focus.
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Yusuke NISHIMURA, Noriyoshi OKAMOTO
Article type: Article
Session ID: HIR2002-55/MIP2002-7
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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In this paper, the action analysis of the walker who crosses a pedestrian crossing is considered using a Freeman's chain code. The purpose of this paper is analyzing walking speed and the moving directions of a walker on a pedestrian crossing using image processing technology. It can give a warning message to a driver. First an input image is obtained from the fourth floor of a building. Then, subtraction with background Image extracts a person. Walker is pursued from the extracted person region. Danger is examined using these.
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Satoshi NISHIDA, Akihiko SUGIURA
Article type: Article
Session ID: HIR2002-56/MIP2002-7
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Recently, various media (film, TV, computer and so on) are changing from analog to digital, and human movement on computer graphics become the center of public attention. Therefore we do research in new human model on computer graphics. We use muscle based model "action unit", and make a software. This software can make lower extremity movement and composition. We estimate our software by comparing general other software. The way of experimentation is based on "Usability Engineering".
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Satoshi NAKAGAWA, Masahiro FUJIMOTO, Noboru BABAGUCHI, Masahiro KITAHA ...
Article type: Article
Session ID: HIR2002-57/MIP2002-7
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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In this paper, we discuss problems of generating animations based on the natural language instructions. These animations describe human behaviors and changes in environment. The instructor usually focused on the objects for animations without noticing the description of the environment. This requires the supplement of information about the circumstance of the scene on generating a human behavior animation within the scene. Because there is no general method to solve the problem, we cope with it in favor of the domain specific knowledge that is a well-known way to deal with this kind of problems.
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Satoshi YONEMOTO, Rin-ichiro TANIGUCHI
Article type: Article
Session ID: HIR2002-58/MIP2002-7
Published: January 30, 2002
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 it 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.
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Wona LEE, Kenji OHMORI
Article type: Article
Session ID: HIR2002-59/MIP2002-7
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Three-dimensional CG is currently visualized, based on polygonization modeling with single layer structure. However, characteristic properties of objects cannot be preserved by a single layer structure. Therefore, this paper describes how to build data structure of objects with multiple layered structure. Cell structured spaces give means of a cell model to represent abstract classes of an object, and are helpfurl as effective tools for expressing the abstract model for visualization.
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Arei Kobayashi, Satoru Takagi, Naomi Inoue
Article type: Article
Session ID: HIR2002-60/MIP2002-7
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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This paper proposes the transformation method from raster image data to SVG (Scalable Vector Graphics). SVG is a WWW standard data format for two-dimensional vector graphics officially formulated at W3C in September 2001. By using this method, application can deal with raster images as vector graphics, and therefore application can sufficiently utilize some merits of SVG. This paper shows the general outline of SVG and the results of evaluation tests, and this paper also shows the effectiveness of the transformation technology for SVG conversion
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Article type: Appendix
Pages
App1-
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
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Article type: Appendix
Pages
App2-
Published: January 30, 2002
Released on J-STAGE: September 20, 2017
CONFERENCE PROCEEDINGS
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