著者

吉田 匠 城 堅誠 南澤 孝太 新居 英明 川上 直樹 舘 [ススム]

出版者

The Institute of Image Information and Television Engineers

雑誌

映像情報メディア学会誌 : 映像情報メディア = The journal of the Institute of Image Information and Television Engineers (ISSN:13426907)

巻号頁・発行日

vol.63, no.6, pp.801-809, 2009-06-01

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A wide field of vision is important for driver safety and vehicle operability. However, the window area of vehicles is limited. Therefore, we developed head-tracked retro-reflective projection technology that displays vehicle blind spot information. The system enables the driver to observe the surroundings in the blind spot as if seeing through the inner wall of the vehicle. The system uses a head-mounted projector and multiple cameras. We describe the system design, the implementation of a prototype, and performance evaluation experiments. Early experiments showed that the system effectively displayed the blind spot information corresponding to the operator's looking around motion.

著者

Nobuyuki Yagi Yasuhiro Itou Shuichi Fujisawa

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.7, no.3, pp.112-117, 2019 (Released:2019-07-01)

参考文献数

11

被引用文献数

1 2

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The distance at which TV is viewed in the home is analyzed in terms of the conditions of the surroundings. Newly developed survey method makes it possible to collect a lot of reliable data at a considerably cheaper cost and in a shorter period than in a field survey although based on a questionnaire survey. The results show that the relative viewing distance is around 5 screen heights (H), which is 1 H shorter than before. This change is primarily because the screen size of TVs at home have become bigger despite that the room area has not changed. Absolute viewing distance depends on room area, but screen size does not depend on room area so much. The viewing distance is shorter than the average if the viewer is closely focused on the TV or if interactive services are frequently used.

著者

Hiroaki Yano Tomohiro Yendo

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.11, no.2, pp.43-48, 2023 (Released:2023-04-01)

参考文献数

16

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The multi-projection-based light-field display is a family of glasses-free three-dimensional(3-D) displays that is easy to scale up. We propose a method for creating a light-field display using a projector and kaleidoscope-like optics in this paper. Using optical simulations, we investigate how the kaleidoscope can adjust the display parameters. In addition, for a prototype system, we developed a semi-automatic calibration method. It has been established that a glasses-free 3-D display is possible with a small number of readily available parts and quite a simple structure.

著者

Takeyuki Kobayashi Ryosuke Naito Fumihiko Sakaue Jun Sato

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.2, no.2, pp.192-198, 2014 (Released:2014-04-01)

参考文献数

16

被引用文献数

1

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Recent progress in coded imaging has enabled us to recover sharp images from undesirable image blurs caused by depth and motion. However, the existing methods are limited to single types of blurs, such as depth blur or motion blur. The coded imaging must also tackle the problem of image noise caused by decreasing of input light. In this paper, we propose a method, which enables us to deblur both depth blur and motion blur simultaneously by coding image capture both in space and time. In particular, we show that by changing the aperture pattern efficiently, accurate image deblurring can be achieved under the existence of image noise.

著者

Yuichi Mashiba Hisham E. Bilal Salih Naoto Wakatsuki Koichi Mizutani Keiichi Zempo

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.10, no.4, pp.216-224, 2022 (Released:2022-10-01)

参考文献数

43

被引用文献数

1

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In this paper, we develop an automatic image sonification system using auditory icons and their stereophonic presentation. We evaluated the effects of scene sounds and action sounds on the understanding of the scene and the sense of presence. The results showed that the scene sounds contributed to the understanding of the scene and the sense of presence and that action sounds also improved the sense of presence. On the other hand, it was confirmed that object sounds alone can convey scene information in images and have a high index of sense of presence. Our sonification system is expected to provide not only a more immersive experience for sighted people through images but also an opportunity for people with visual impairments to share the experience through social networking services (SNSs).

著者

Hirohito Shibata Kengo Omura

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.6, no.4, pp.255-261, 2018 (Released:2018-10-01)

参考文献数

32

被引用文献数

6 6

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Handwriting is preferred when people take notes or annotate during listening to lectures or reading documents. This paper proves the effects of handwriting experimentally. Two experiments using a dual task method revealed that the cognitive load of handwriting was smaller than that of typing and typing interfered with memorization more than handwriting. Moreover, this tendency was also observed for people who can type fast with touch typing. This indicates that handwriting has a strong advantage in keeping information without interfering with other cognitive activities regardless of people's typing skill.

著者

吹抜 敬彦

出版者

The Institute of Image Information and Television Engineers

雑誌

映像情報メディア学会大会講演予稿集

巻号頁・発行日

pp.11, 2003 (Released:2004-03-26)

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The 3-dimensional(3-d) frequency [horizontal-vertical-temporal frequency] domain can be understood easily and directly by the newly proposed SZB(Spherical Zone Ball), which is the direct extension of the 2-d CZP(Circular Zone Plate) to the 3-d one. This paper also proposes the direct-observing method of the 3-d frequency characteristics.

著者

Masayoshi Higuchi Yukio Fujii Yoji Hisamatsu

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.9, no.4, pp.228-233, 2021 (Released:2021-10-01)

参考文献数

21

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Metallo-supramolecular polymers (MSPs) are a novel type of electrochromic (EC) materials. Ru(II)-based MSP (polyRu) composed of Ru(II) and bis(terpyridyl)benzene showed reversible color changes between orange and pale green. The orange color was caused by the metal-to-ligand charge transfer (MLCT) absorption in polyRu and disappeared by the electrochemical oxidation of Ru(II) to Ru(III). The pale green was returned to the original orange by the electrochemical reduction of Ru(III) to Ru(II). EC devices with polyRu were fabricated by the combination of an electrolyte solution, counter material, and two ITO glasses. The character images were displayed on the EC devices using insulating films. The insulating films prevented the electron transfer between the ITO glass and the polyRu layer and made the image stand out in the device. The fabricated EC display devices were presented at a science museum of Japan as experience-based exhibits.

著者

Junichi Shibasaki Kenichi Aoshima Shintaro Aso Nobuhiko Funabashi Takahiro Ishinabe Yosei Shibata Hideo Fujikake Kenji Machida

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.9, no.4, pp.240-246, 2021 (Released:2021-10-01)

参考文献数

22

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We compare the diffraction characteristics of ferroelectric (FLC) and nematic liquid crystal (NLC) devices with one-dimensional stripe patterns of 1-10 µm pixel pitches. The polarizing micrographs show pixel boundaries of black/white pixels blur as the pixel pitch becomes smaller. The blur of NLC is more remarkable than that of FLC. The first-order diffraction efficiency of NLC remains constant for the pixel pitch of 4-10 µm and sharply decreases for the pixel pitch of < 2 µm. By contrast, the FLC efficiency decreases with the pixel pitch decrease from 10 to 4 µm and remains constant for the pixel pitch of < 3 µm. The FLC efficiency (5.5%) is four times larger than that of NLC (1.4%) with a 1 µm pixel pitch. The Fourier transform calculation shows the efficiency degradation of FLC is caused by the blur at the pixel boundary, whereas that of NLC caused by the blur and contrast deterioration.

著者

Keiichiro Kagawa

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.9, no.2, pp.114-121, 2021 (Released:2021-04-01)

参考文献数

31

被引用文献数

4

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Multi-tap CMOS pixels that are composed of a single photodiode, multiple sets of a charge transfer gate and storage diode, and a draining gate can implement functional imaging. In this paper, imaging systems based on the multi-tap CMOS pixel are categorized into those with synchronized active illuminations and those using coded exposure. Applications for quantitative wide-field imaging based on spatial frequency domain imaging (SFDI) using structured light projection and multi-exposure laser speckle contrast blood flow imaging (MELSCI) utilizing multiple exposure times are shown. The multi-tap CMOS pixel provides additional benefits like suppression of ambient light and motion artifact with SFDI and efficient sampling at a video rate with MELSCI.

著者

安藤 聖泰

出版者

The Institute of Image Information and Television Engineers

雑誌

映像情報メディア学会誌 (ISSN:13426907)

巻号頁・発行日

vol.68, no.3, pp.J111-J116, 2014

被引用文献数

1

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地上デジタル放送が開始され10年以上が経過した.それ以降に開始されたFacebookやTwitterといったSNSサービスは短期間で利用者を増やしている.特にここ2~ 3年の間でSNSでの盛り上がりがテレビの視聴行動に影響する事例が多く見られるようになり,テレビ局もSNSを無視することができなくなってきた.日本テレビはこれまで取組んできた"双方向"と呼ばれる機能やサービスをソーシャルへ進化させる取組みとして,JoinTVをスタートさせた.多くの人が番組を見ながら交流して楽しめるJoinTVサービスを紹介する.

著者

中村 晴幸 山内 達郎 西田 泰章 山崎 順一 砂崎 俊二 山元 浩幸 石田 薫

出版者

The Institute of Image Information and Television Engineers

雑誌

映像情報メディア学会大会講演予稿集

巻号頁・発行日

pp.117, 2003 (Released:2004-03-26)

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Conventional converters without motion compensation tend to exhibit double images and other picture-quality problems when handling scenes that contain motion.We develop a compact and lightweight PAL-HDTV standard converter which converts directly between PAL and HDTV.Accurate motion vector detection is achieved by two-way motion detection for smooth transitioning.

著者

石沢 千佳子 佐藤 諒 西田 眞

出版者

The Institute of Image Information and Television Engineers

雑誌

映像情報メディア学会誌 (ISSN:13426907)

巻号頁・発行日

vol.67, no.8, pp.J319-J322, 2013

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Portable storage media, such as universal serial bus (USB) ash drives, are used to carry digital data. However, a great deal of data leaks as a result of users forgetting to delete data copied to a personal computer from portable storage media. We propose a technique to detect the remains of copy content files by analyzing the clipboard and directory logs obtained from a personal computer. Our experimental result suggests that the technique can be used to accurately detect files containing copy left behind.

著者

江藤 剛治 武藤 秀樹 近藤 泰志

出版者

The Institute of Image Information and Television Engineers

雑誌

映像情報メディア学会大会講演予稿集

巻号頁・発行日

pp.95, 2003 (Released:2004-03-26)

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In 2000, the authors developed an image sensor and a video camera of 1,000,000 fps. The image sensor was an in-situ storage image sensor (ISIS) with slanted linear CCD storage. Possible structures for the next-generation ISIS are discussed. A backside-illuminated ISIS is one of the promising structures.

著者

都竹 愛一郎 永塚 守 三浦 龍

出版者

The Institute of Image Information and Television Engineers

雑誌

映像情報メディア学会大会講演予稿集

巻号頁・発行日

pp.139, 2003 (Released:2004-03-26)

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Research and development of the stratospheric platform (SPF) has been aggressively pursued. SPF is useful for wireless communications, broadcasting and scientific observations. Although stably control of the SPF is difficult by means of strong wind in the stratosphere. In this paper, we described the wind velocity in the stratosphere, and proposed new operation method of the SPF.

著者

Kenta Masui Genki Okada Norimichi Tsumura

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.8, no.1, pp.49-59, 2020 (Released:2020-01-01)

参考文献数

35

被引用文献数

10

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The market size of online video advertising is expanding rapidly along with the spread of smartphones and social media. In this study, we estimate advertising effectiveness in the natural environment using online data collection and the remote measurement of webcam facial expressions and physiological responses. We collected 4, 108 videos of the faces of 411 Japanese people who were watching the video advertisement in their natural environment via the Internet. Facial expression and physiological responses such as heart rate and gaze were remotely measured by analyzing facial videos. We found that the accuracies of ad liking and purchase intent prediction are better when various acquired features are combined and machine learning is used than when only single-mode features are used. In addition, we aim to improve prediction accuracy by clustering the personality of the subjects and designing an estimation model for each personality.

著者

岩田 洋夫

出版者

The Institute of Image Information and Television Engineers

雑誌

映像情報メディア学会誌 (ISSN:13426907)

巻号頁・発行日

vol.66, no.3, pp.219-222, 2012 (Released:2014-03-28)

参考文献数

3

被引用文献数

1

著者

渋谷 圭祐 谷添 秀樹 平川 辰博 飯村 和之 増田 暁雄 野田 秀夫 奥田 博志 金子 英之 杉浦 博明

出版者

The Institute of Image Information and Television Engineers

雑誌

映像情報メディア学会大会講演予稿集

巻号頁・発行日

pp.69, 2003 (Released:2004-03-26)

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This paper presents development of a wide color gamut CRT display monitor that has 93[%] color gamut compare to NTSC color gamut. It provides the color gamut nearly equal to the Adobe RGB color space. In this paper we would like to report about a prototype of wide color gamut CRT display monitor. We compared color gamut of our prototype vs. a major standard color patches. And more we checked about the gamut change accrording to the viewing angle. We believe that our monitor is useful for soft proofing of DTP as replacement of conventional CRT displays.

著者

Wei-Ta Chu Hideto Motomura Norimichi Tsumura Toshihiko Yamasaki

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.7, no.2, pp.60-67, 2019 (Released:2019-04-01)

参考文献数

72

被引用文献数

3

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With the advances in digital media processing technologies and the tremendous growth in the amount of digital media that have been created, new artworks are becoming possible and drawing much attention from researchers, industry, and consumers. A related emerging research area is the evaluation of such multimedia artworks by machine learning techniques. We call this research area “attractiveness computing.” Attractiveness computing is made possible by the great accumulation of such multimedia artworks and of consumers' responses. In this paper, we review existing research on multimedia artworks analysis and attractiveness computing.

著者

Cathal Gurrin Klaus Schoeffmann Hideo Joho Andreas Leibetseder Liting Zhou Aaron Duane Duc-Tien Dang-Nguyen Michael Riegler Luca Piras Minh-Triet Tran Jakub Lokoč Wolfgang Hürst

出版者

The Institute of Image Information and Television Engineers

雑誌

ITE Transactions on Media Technology and Applications (ISSN:21867364)

巻号頁・発行日

vol.7, no.2, pp.46-59, 2019 (Released:2019-04-01)

参考文献数

31

被引用文献数

69

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The Lifelog Search Challenge (LSC) is an international content retrieval competition that evaluates search for personal lifelog data. At the LSC, content-based search is performed over a multi-modal dataset, continuously recorded by a lifelogger over 27 days, consisting of multimedia content, biometric data, human activity data, and information activities data. In this work, we report on the first LSC that took place in Yokohama, Japan in 2018 as a special workshop at ACM International Conference on Multimedia Retrieval 2018 (ICMR 2018). We describe the general idea of this challenge, summarise the participating search systems as well as the evaluation procedure, and analyse the search performance of the teams in various aspects. We try to identify reasons why some systems performed better than others and provide an outlook as well as open issues for upcoming iterations of the challenge.