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Displaying 1-13 of 13 articles from this issue
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Article type: Cover
Pages Cover1-
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (18K) -
Article type: Index
Pages Toc1-
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (71K) -
Article type: Appendix
Pages App1-
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (61K) -
Masayuki SHIRAKAWA, Yasuto SUMIYA, Shigeru OZEKIArticle type: Article
Pages 1-8
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSSome aircraft accidents occurred due to bad visibility like in fog. Enhanced Vision System is one of possible solutions to improve these situations. Presently we have three options for EVS. Infrared camera, milimeter RADAR and computer graphics. Since Infrared or milimeter wave system is used as an actual world view tool, they may work as a supplemental tool in unexpected situations like car accidents on taxiway or runway. Since there is no single measures for EVS presently, a fusion of two images is discussed in this paper.View full abstractDownload PDF (1368K) -
Yuko Yamanouchi, Masaki Hayashi, Seiki Inoue, Shigeru ShimodaArticle type: Article
Pages 9-16
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have made a fixed principal point camera head for composing camera images to high resolution omnidirectional image or panoramic image. With zooming and focusing of camera lens, the principal point of camera lens usually moves forward or backward. And if the point is not on the center of rotation of the camera, the composed image does not go well. In this paper, we describe the newly developed camera head which can fix the principal point with zooming or focusing data. Using this camera head, we construct horizontal and vertical high resolution panoramic images from about 150-1000 camera images, and finally could compose them to the whole view image.View full abstractDownload PDF (1020K) -
Hideki MITSUMINE, Yoshiaki TANAKA, Hideo SUZUKIArticle type: Article
Pages 17-22
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWigs were often used in a period drama production. Recently, they have been also used in a HDTV period drama production. But, it is causing some problems with increasing resolution. One of some problems is that a boundary of the wig is unnatural. Therefore, we have newly developed an image processing method for erasing the boundary of the wig automatically. We are describing the method and results in this paper.View full abstractDownload PDF (1046K) -
Takashi OZEKI, Fujio KOBAYASHIArticle type: Article
Pages 23-28
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn this paper, the restoration problem of blurred images which are blurred by the point spread function with Gauss distribution. Usually, it is difficult to presume the original image if the blurred image does not have something a special condition. Therefore, original images in this paper is limited to binary images. To restore the original image, we introduce a new function which evaluates a binary degree of images. This evaluation function is defined by using Otsu's method which is the technique of making to binarization of the gray scale image. Restoration of the original image is enabled by presuming standard deviation of Gauss distribution by using this function. By computer simulation, it was shown that the original image took the maximum of the evaluation function. Hence, if this evaluation function is used, it is confirmed to be able to restore the original image.View full abstractDownload PDF (659K) -
Takanori NAGAE, Hiroshi NAGAHASHIArticle type: Article
Pages 29-35
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn usual cases, most cells in a volume data set are empty, and this means almost all rendering time is wasted simply in traversing the empty cells along the viewing rays in raycasting computation. To accelerate raycasting, all the non-empty cells are sandwiched by a pair of pre-calculated depth maps, and 3DDDA is only applied to the interval. Also a shadow map is used to eliminate 3DDDA process from shadowing. Additionally, we study and compare some cubic root solvers necessary for intersection tests of trilinearly interpolated isosurfaces.View full abstractDownload PDF (992K) -
Takanori NAGAE, Hiroshi NAGAHASHIArticle type: Article
Pages 37-43
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe propose a new volume rendering technique called cell projection, which is a hybrid approach using both forward and backward projections. It renders high quality images as well as raycasting. Non-empty cells are forward projected onto the projection plane, from each pixel within the projected region of the cell, a ray is back-projected to the cell, and the intersections are inserted and sorted in depth order in the intersection list map. Using this intersection map, instead of using traditional raycasting, we can accelerate rendering translucent layered structures presented in a huge volume dataset.View full abstractDownload PDF (955K) -
Hideki Shirai, Masashi Kameda, Makoto Miyahara, Masakazu TeradaArticle type: Article
Pages 45-50
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe are investigating the important physical factors for the reproduction of the high order artistic impression (high order sensation) in a display of images. Related to the faithful reproduction of image depth, some physical factors of CRT display have been discoverd. In this report, we are focusing on the effect of the halation. After exhaustive observations, we formed the hypothesis that halation on the surface of CRT might cause a serious degradation of image quality such as "image depth". The increase of luminance around a white rectangle caused by the halation have been measured and the result of assessment test has shown that the halation deterioretes the reproduction of the high order sensation seriously.View full abstractDownload PDF (722K) -
Shigeru Akamatsu, Masashi Kameda, Makoto MiyaharaArticle type: Article
Pages 51-56
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe aim to clear the construction of the high order Audio-Visual system focusing on a reproduction of high order artistic impressions. When we are given attention at the reproduction of high order artistic impressions, the relationship between a picture quality and physical factors has not been clarified. From the view point of High Order Sensation which is defined as high order artistic impressions, we consider that a new relationship between the picture quality and physical factors is obtained. Therefore, we are investigating the above relationship. In this report, we have collected 332 assessment words and 22 constructive factors composing pictures, based on the transmission of artistic impressions. Applying the KJ method to collected assessment words, we have obtained 21 representative assessment words. Then, we have analyed the hierarchical structure among these words using the Dematel method.View full abstractDownload PDF (787K) -
Makoto Miyahara, Yukio Kobayashi, Hideki Shirai, Hidehiko HayashiArticle type: Article
Pages 57-64
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe are finding new possibility to reproduce the high order sensation by an electric imaging sysytem. A new discovery is that a pilot system of the Extra High Quality Imaging System can display deep impression than the impression accepted by a direct observation of the original photograph. We have considered the reason. Extrapolating the fact above, we have tried to improve the reproduction of Renoire's the famous "Nude in the sun" which young girl's skin of shadow has been observed as a skin which have gone bad. We are expecting the bad observation is improved to a skin lit by sunshine beams shining through branches of trees.View full abstractDownload PDF (1011K) -
Article type: Appendix
Pages App2-
Published: November 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (74K)
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