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Masayuki Nakajima
2001 Volume 55 Issue 7 Pages
940-942
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Cinema Complex and Digital Cinema
Yusuke Okada
2001 Volume 55 Issue 7 Pages
943-944
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Toshihiko Furukawa
2001 Volume 55 Issue 7 Pages
945-946
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Yoshinori Watanabe
2001 Volume 55 Issue 7 Pages
947-952
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Hideo Tsuji
2001 Volume 55 Issue 7 Pages
953-955
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Delivering Movies Electronically
Steven Morley, Takayuki Nozaki
2001 Volume 55 Issue 7 Pages
956-959
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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HDW-F900
Yasuhiko Mikami
2001 Volume 55 Issue 7 Pages
960-962
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Mitsuru Hayakawa
2001 Volume 55 Issue 7 Pages
963-965
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Shuiti Yokobori
2001 Volume 55 Issue 7 Pages
966-967
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Sadao Nobe
2001 Volume 55 Issue 7 Pages
968-970
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Kenji Hasegawa, Syuuichi Fukuo, Tetsuro Miyazaki
2001 Volume 55 Issue 7 Pages
971-974
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Internet
Hideki Sunahara
2001 Volume 55 Issue 7 Pages
975-979
Published: July 20, 2001
Released on J-STAGE: August 17, 2011
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Hiroshi Jinzenji
2001 Volume 55 Issue 7 Pages
980-981
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Tomoharu Nagao
2001 Volume 55 Issue 7 Pages
982-983
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Masato Ogata, Kagenori Kajihara, Shigeru Muraki, Kazuro Shimokawa, Kwa ...
2001 Volume 55 Issue 7 Pages
1011-1018
Published: July 20, 2001
Released on J-STAGE: August 17, 2011
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Fast direct volume-rendering systems are in high demand due to the increasing amount of scientific data generated by a variety of computer simulations, of medical data obtained by MRI and CT scanners, and of geological, oceanographic, and meteorological data collected from various sensors. A notable characteristic shared by these data volumes is the sheer amount of data to be rendered. A huge amount of computing power is thus needed for animated visualization, which is essential to observe many physical phenomena. We propose a fast parallel volume-rendering method using multiple-shear composition and describe its implementation on a PC-cluster. In this system, a volume is divided into subvolumes, one for each PC, and each PC generates base-plane image from its subvolume. These images are composited into a single base-plane image that is warped to get the correct image on the screen. Our proposed “multiple-shear composition” method is nearly four time faster than a raycasting method we implemented on the same PC-cluster. In addition, it has processing scalability due to the low volume of communications between PCs. A large volume can be handled because each PC handles only a subvolume. This system is thus suitable for large-scale scientific simulations.
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Yoshinori Dobashi, Tsuyoshi Yamamoto, Tomoyuki Nishita
2001 Volume 55 Issue 7 Pages
1019-1024
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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An important element in enhancing the reality of computer graphics is the effect of atmospheric scattering. This effect creates shafts of light when atmospheric particles are illuminated. We have developed an accurate and fast method for displaying shafts of light produced by studio spotlights. To calculate the intensity of the light reaching the viewpoint, multiple semi-transparent planes are placed in front of the viewpoint. The intensities of these planes are set to the intensities of the light reaching the viewpoint. The shafts of light are displayed based on the intensities of the planes. These processes are accelerated by graphics hardware, using, in particular, color blending, texture mapping, shadow mapping, and multi-texturing functions. The proposed method renders the shafts of light very quickly, making it useful for designing lighting effects in sudios, on stages, and so on.
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Yoshimasa Satou, Hideyuki Shimada, Mitsuru Shiono, Yoshiya Miyagaki
2001 Volume 55 Issue 7 Pages
1026-1034
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Research into the the representation of flames using CG has focused on flame representation. There has been little research into the relation between the flame and the burning object. The burning object has been interpreted as the fuel resource, that is, the combustion root, or as an obstruction to the flame's motion. In this paper, we interpret combustion as deformation of both the flame and the objects and propose a CG representation method. The representation subject is the object which occured the shrinking deformation. Before our experiments, we observed actual scenes of combustion, then based on these observations, we represented the deformation and the color change. In this method, the burning object is modeled using 3D volume data, and the control parameters are set to these. The deformation and color change are represented by changing the parameters with cellular-automata and a heat equation. Our experiments showed that our method more realistically represents combustion and deformation, particularly of wood.
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Junji Sone, Naohide Goto, Yuichiro Kume, Norihiko Mori, Hiroshi Toriya ...
2001 Volume 55 Issue 7 Pages
1035-1038
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Yoshio Hagihara
2001 Volume 55 Issue 7 Pages
1039-1044
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Logarithmic-converting CMOS area image sensors with an FPN cancel circuit, fabricated using a conventional CMOS process, have been developed. The sensors have 540 (H) × 148 (V) pixels, each with a logarithmic-converting circuit and a simple FPN cancel circuit. Their cells are 7 μm (H) × 21 μm (V). They output a signal with a strength logarithmically proportional to the integrated amount of photo current generated by incident light. They can therefore capture bright and dark objects at the same time without using a frame memory. This sensor should thus find application in consumer (digital still cameras, digital video cameras, and so on) and industrial products.
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Minoru Nakayama, Yasutaka Shimizu
2001 Volume 55 Issue 7 Pages
1045-1048
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Yasuhiro Takeuti, Kazuhisa Haeiwa, Kazuhiro Akiyama
2001 Volume 55 Issue 7 Pages
1049-1052
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Junya Suzuki, Yuji Sagawa, Noboru Sugie
2001 Volume 55 Issue 7 Pages
1053-1057
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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Yongmei Liu, Tsuyoshi Yamamura, Toshimitsu Tanaka, Noboru Ohnishi
2001 Volume 55 Issue 7 Pages
1058-1061
Published: July 20, 2001
Released on J-STAGE: March 14, 2011
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An augmented method for finding character lines in a gray scene image is proposed. In the proposed approach, we use several heuristics of both characters (such as size, symmetry of pixels and bimodality of intensity histogram) and character lines (such as proximity of characters and alignment of arrangement) to discriminate characters from other objects in a scene image. Experimental results indicated that the method performed well for signboards imaged from a relatively wide range of viewing directions.
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