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Tetsuo Funada, Masao Kasuga
2000 Volume 54 Issue 6 Pages
752-755
Published: June 20, 2000
Released on J-STAGE: August 17, 2011
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Shinji Hayashi
2000 Volume 54 Issue 6 Pages
756-759
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Tohru Takagi
2000 Volume 54 Issue 6 Pages
760-764
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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From Speech Recognition to Spoken Message Understanding
Sadaoki Furui
2000 Volume 54 Issue 6 Pages
765-768
Published: June 20, 2000
Released on J-STAGE: August 17, 2011
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Hiroki Mori, Hideki Kasuya
2000 Volume 54 Issue 6 Pages
769-772
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Hareo Hamada
2000 Volume 54 Issue 6 Pages
773-778
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Kenji Kobayashi
2000 Volume 54 Issue 6 Pages
779-784
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Tomoshi Hirayama
2000 Volume 54 Issue 6 Pages
785-790
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Masahiro Yoshizaki
2000 Volume 54 Issue 6 Pages
791-797
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Hiroshi Yamamoto, Kenji Mizutani, Kenji Iwano
2000 Volume 54 Issue 6 Pages
798-801
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Assessment Technique of Multimedia-The Outline of Subjective Assessment on Images, Audio and Printing, and of Human Interface-
Masaru Kanazawa, Setsu Komiyama, Toshihiko Inagaki, Kazunari Morimoto
2000 Volume 54 Issue 6 Pages
802-811
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Takashi Ida
2000 Volume 54 Issue 6 Pages
812-813
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Kohtaro Asai
2000 Volume 54 Issue 6 Pages
814-815
Published: June 20, 2000
Released on J-STAGE: August 17, 2011
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Tomonori Masuno, Suguru Saito, Hiroki Takahashi, Masayuki Nakajima
2000 Volume 54 Issue 6 Pages
833-839
Published: June 20, 2000
Released on J-STAGE: August 17, 2011
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Various types of interface devices operated with the hands have been developed and are widely used. However, we use our legs for walking in the real world, so it is natural to use an interface devices operated with the legs for moving around a virtual environment. In this paper, we have developed a new interface device “Waraji (WAlking, Running, And Jumping Interface)”. Using Waraji, users can work at ease in a virtual environment because their hands are free from movement operations. In addition, because Waraji is smaller than other interfaces for movement, it can he easily worn. Experiments have shown that Waraji provides operationality similar to that of a joystick. It will be useful for surround-display virtual-environment systems such as CAVE (CAVE Automatic Virtual Environment).
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Tetsuya Watanabe, Yuichiro Kume, Tohru Ifukube
2000 Volume 54 Issue 6 Pages
840-847
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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To provide visually-impaired people access to graphical information, we previously developed a device called a “tactile mouse.” It consists of a computer mouse and a small tactile display. Tactile information is fed back to the fingers according to the mouse's movements, giving the user the feeling of exploring tangible drawings. Because the tactile display is small, however, users tend to deviate from the tangible graphics when they move the mouse too much. To identify conditions for reducing this deviation, we conducted two experiments : one on line following and one on shape discrimination. We found that when the parameter called “hand-movement-to-pin ratio” was too low, the chances of deviation increased, and when it was too high, discrimination failures occurred more frequently. Consequently, intermediate conditions that led to less deviation and fewer discrimination failures were found to be adequate for the efficient use of the tactile mouse.
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Kazuyuki Imagawa, Rin-ichiro Taniguchi, Daisaku Arita, Hideaki Matsuo, ...
2000 Volume 54 Issue 6 Pages
848-857
Published: June 20, 2000
Released on J-STAGE: August 17, 2011
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A sign-language recognition system should use information from both global features, such as hand movement and location, and local features, such as hand shape and orientation. We designed a system that first selects possible words by using the detected global features, then narrows the choices down to one by using the detected local features.
In this paper, we describe an adequate local feature recognizer for a sign-language recognition system. Our basic approach is to represent the hand images extracted from sign-language images as symbols corresponding to clusters by using a clustering technique. The clusters are created from a training set of extracted hand images so that images with a similar appearance can be classified into the same cluster in an eigenspace. Experimental results showed that our system can recognize a signed word even in two-handed and hand-to-hand contact cases.
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Katsunori Isono, Mitsuo Yamamoto, Masaomi Oda, Shigeru Akamatsu
2000 Volume 54 Issue 6 Pages
858-864
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Available methods for synthesizing facial expressions synthesize basic expressions. Few methods synthesize subtle facial expressions such as a knavish smile or a cold smile. We developed a system for synthesizing subtle facial expressions. It uses an interactive interface based on a genetic algorithm. We use the five main parts of the face : eyebrows, eyes, mouth, and contours. These parts are deformed independently. Using this system, subtle facial expressions can be synthesized by iterating a deformation process for each part. Experiments showed that this system can efficiently synthesize subtle facial expressions.
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Keiichi Yonemura, Akihiko Sugiura, Hotaka Takizawa, Shinji Yamamoto, H ...
2000 Volume 54 Issue 6 Pages
865-870
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Cerebral disease is becoming a more serious problem as society ages. Methods are thus needed to evaluate the extent of cerebral disease so that rehabilitation can be provided. In our study, we are trying to detect early sign of cerebral disease by making use of the recognition mechanism of the face and synthesizing facial images using computer technology. We evaluated the extent of cerebral disease by performing two kinds of experiments : parts synthesis and expression synthesis. By detecting cerebral disease early, we start rehabilitation early and reduce the load on medical doctors. Based on the results, we classified prosopagnosia patients as having cerebral disease or being normal. We then identified those in the second group that had a risk of slight cerebral disease by conducting a parts-movement experiment.
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Yuichiro Kume, Akira Inoue
2000 Volume 54 Issue 6 Pages
871-874
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Masanori Nishimura, Atsushi Nishikawa, Kengo Koara, Fumio Miyazaki
2000 Volume 54 Issue 6 Pages
875-879
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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Minako Sawaki, Hiroshi Murase, Norihiro Hagita
2000 Volume 54 Issue 6 Pages
881-886
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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We developed an adaptive dictionary-selection method for recognizing low-quality characters in scene images. First, the environmental conditions of the input image are estimated using an initial dictionary. Then, a relevant dictionary from several dictionaries reflecting different environmental conditions is automatically selected based on the estimation and used for recognition. Experiments on characters in images of bookshelves showed that this method achieves a higher recognition rate (89.8%) than that using one fixed dictionary (76.4%). Furthermore, recognition accuracy improved from 89.8% to 95.2% when contextual postprocessing was used.
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Sachiko Ohno, Kazuhiko Ukai
2000 Volume 54 Issue 6 Pages
887-891
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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We investigated the effect of using a head-mounted display (HMD) to play game. Thirty young subjects were asked to fill in a questionnaire with 28 items concerning eye strain, motion sickness, and display-work related symptoms before and after 20 minutes of playing TV games. Each subject performed two sessions, in one session, a conventional TV monitor was used, and in the other, a commercially available HMD was used. Using factor analysis, we classified these items into an eye-strain related group and a motion-sickness related group. Almost all symptoms were worsen after game playing. Fourteen items in the TV-monitor sessions and 22 items in the HMD sessions were statistically significant. Statistical tests showed that seven symptoms related to motion sickness were significantly worse only with the HMD.
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Quality of Facial Coloration
Tohru Tamura, Iwao Ohishi
2000 Volume 54 Issue 6 Pages
892-900
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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We tested the image quality of face color for several color reproduction ranges. Image quality was subjectively measured according to a five-grade scale. We prepared test images by using a software program to add white into the image data to decrease the color saturation of the test images. Six different color reproduction ranges, 69%, 50%, 39%, 29%, 19%, and 12% the NTSC color reproduction range, were simulated by changing the amount of white added. Nine portraits were used as the test images. Test participants were asked to judge the quality of the face color and also to judge the amount of perceived unnatural whiteness in the face color.
The results show that the quality of facial coloration decreases and that the perceived unnatural whiteness increases as the color reproduction range is reduced. We found that 50% or more color reproduction was necessary to achieve “fair” to “good” quality color and that no unnatural whiteness was perceived when the color quality was better than intermediate between “fair” and “good”. We also found that the saturation of face color was about 80% that of the original image color.
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Seiji Hotta, Kohei Inoue, Kiichi Urahama
2000 Volume 54 Issue 6 Pages
901-903
Published: June 20, 2000
Released on J-STAGE: August 17, 2011
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Makoto Sato, Katsuya Kudo, Takashi Seki, Masami Aizawa, Noboru Taga, T ...
2000 Volume 54 Issue 6 Pages
904-910
Published: June 20, 2000
Released on J-STAGE: March 14, 2011
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