著者

荒井 祐介 若林 憲一 吉川 雅英 奥 寛雅 石川 正俊

出版者

一般社団法人 日本ロボット学会

雑誌

日本ロボット学会誌 (ISSN:02891824)

巻号頁・発行日

vol.31, no.10, pp.1028-1035, 2013 (Released:2014-01-15)

参考文献数

16

被引用文献数

1 1

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Recently, flagella and cilia have gathered attension since their important role in mammal cells and relation to genetic diseases of human were revealed. Chlamydomonas is one of the model organism of flagella and phototaxis research. The purpose of our research is to track a freely swimming individual Chlamydomonas cell to observe its flagella and whole body movement with dark field microscopy to investigate the phototactic reaction of Chlamydomonas. In this paper, a method for three-dimensional tracking of Chlamydomonas using high-speed visual feedback in dark field microscopy is proposed. The method was implemented to an existing microscope tracking system. It demonstrated successful three-dimensional tracking of a swimimng Chlamydomonas for several tens of seconds. The precisions of the 3D position measurement were estimated as ±1[μm] (XY) and ±10[μm] (Z).

著者

野村 美友 奥 寛雅

出版者

一般社団法人 日本機械学会

雑誌

ロボティクス・メカトロニクス講演会講演概要集

巻号頁・発行日

vol.2019, pp.1A1-R01, 2019

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<p>In this presentation, we propose an edible lens with a build-in aperture that can be eaten. The proposed lens is made of agar for transparent part and soft adzuki-bean jelly for an aperture to stop incident light. The aperture of a prototype worked properly to form image without an additional aperture. The prototype also showed a certain optical resolution of 5.56 LP/mm.</p>

著者

奥村 光平 石井 将人 巽 瑛理 奥 寛雅 石川 正俊

出版者

公益社団法人 計測自動制御学会

雑誌

計測自動制御学会論文集 (ISSN:04534654)

巻号頁・発行日

vol.49, no.9, pp.855-864, 2013 (Released:2013-10-16)

参考文献数

17

被引用文献数

5 1

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In spite of high demands in a lot of industrial fields, it is viewed as difficult to capture a stuff flying at the speed of hundreds [m/s] order same as acoustic velocity. A high-frame-rate camera (≈10000 [fps]) is often adopted to observe it. However, this method gives us only a short-lasting recorded data. Furthermore, a quite short exposure time (≈ 5 [µs]) and regionally concentrated illumination are required in order to cut down a motion blur. In this paper, a measurement means specialized for such a high-speed object is proposed. A high-speed gaze controller, called Saccade Mirror keeps its camera gaze casting the matter while soaring. We successfully obtained the longer images with brightness and a little motion blur.

著者

奥村 光平 奥 寛雅 石川 正俊

出版者

一般社団法人 日本ロボット学会

雑誌

日本ロボット学会誌 (ISSN:02891824)

巻号頁・発行日

vol.29, no.2, pp.201-211, 2011 (Released:2011-04-16)

参考文献数

19

被引用文献数

12 7

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The purpose of our study is to realize an active vision capable of casting its gaze in any desired direction in ms-order. It is, however, difficult even if a vision sensor itself is controlled directly by high-speed actuators. Therefore, we propose a high-speed gaze control subsystem, called “Saccade Mirror.” Using this system and a high-speed vision, image sequences that each image has different direction of gaze in msorder has been successfully obtained. Measuring the frequency response of the gaze control, this result has exceeded the preceding study. That is to say, the utility of our proposal has been ascertained.

著者

宇治 貴大 張 依婷 奥 寛雅

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.22, no.4, pp.535-543, 2017 (Released:2017-12-31)

参考文献数

13

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Retroreflectors can reflect incident light to the light source, and they are often used as the optical marker for machine vision. Most of the conventional retroreflectors are made from glass or plastic, and they are not edible. Thus, it is difficult to apply them to foods or inner wall of digestive organs. This paper proposes edible retroreflector made from foodstuffs. A recipe of the edible retroreflector using kanten, which is traditional Japanese cooking ingredient to form a transparent jelly, is described. A prototype made from kanten showed retroreflective function from reflectance measurement experiment. Dynamic projection mapping on a Swiss roll was successfully demonstrated using the prototype as an optical marker.

著者

奥 寛雅 末石 智大

出版者

一般社団法人 日本ロボット学会

雑誌

日本ロボット学会誌 (ISSN:02891824)

巻号頁・発行日

vol.35, no.8, pp.605-609, 2017 (Released:2017-11-15)

参考文献数

12

著者

末石 智大 長谷川 圭介 奥村 光平 奥 寛雅 篠田 裕之 石川 正俊

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.19, no.2, pp.173-183, 2014-06-30 (Released:2017-02-01)

被引用文献数

1

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In this paper, we propose an image and tactile presentation system for quickly moving objects, high-speed dynamic information environment, and a calibration method between a camera and Airborne Ultrasound Tactile Display(AUTD), which can present tactile sensation noncontactly as focused ultrasound. We realize one example of high-speed dynamic information environment that even if an object is moving, we can use the object as a tool for human interfaces without delay by combining a high-speed gaze controller by rotational mirrors. An accuracy of position, however, is not sufficient against difference threshold between images and tactile sensation because of mainly error of position between AUTD and camera. We calibrate the AUTD-camera system by visualizing the invisible focal position using Frustrated Total Internal Reflection(FTIR). Experimental results show that estimation accuracy is better than the threshold.

著者

奥村 光平 奥 寛雅 石川 正俊

出版者

一般社団法人 映像情報メディア学会

雑誌

映像情報メディア学会誌 (ISSN:13426907)

巻号頁・発行日

vol.67, no.7, pp.J204-J211, 2013 (Released:2013-06-25)

参考文献数

19

被引用文献数

1 2

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Recently, augmented reality (AR) by using a projector, which is often called projection-based AR, has been focused on and widely studied. We propose a projection-based AR system, named “Lumipen” for a high-speed or high-frequency object, using a 1000-fps vision sensor and a high-speed optical axis controller. Conventional research on projection-based AR has mainly focused on static objects or circumstances. In our system, the projected direction and projected image can be controlled based on the dynamic object behavior detected by a 1000-fps vision sensor. Instead of a rotational basement, the high-speed optical axis controller is an essential subsystem to catch up with the speed of the 1000-fps vision sensor. Lumipen is expected to provide high-quality visual information addition even in dynamic live content (e.g. a play, sport game, music concert) similar to CG in video content.

著者

末石 智大 奥村 光平 奥 寛雅 石川 正俊

出版者

特定非営利活動法人 日本バーチャルリアリティ学会

雑誌

日本バーチャルリアリティ学会論文誌 (ISSN:1344011X)

巻号頁・発行日

vol.18, no.2, pp.181-190, 2013

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In this paper, we propose a stereo measurement system to observe continuously an object which moves and deforms quickly and irregularly, and to reconstruct its high-resolution 3D shape. The system is a stereo vision system using two gaze controllers by rotational mirrors. Each gaze controller tracking a quickly moving object, the system captures stereo images, and temporally continuous 3D shapes of the object are reconstructed from the stereo images. We discuss settings of the system considering characteristics of a gaze controller by rotational mirrors. The experimental results show that the system can capture stereo images tracking a quickly and irregularly moving object, and can reconstruct temporally continuous high-resolution 3D shapes of the object.

著者

奥村 光平 奥 寛雅 石川 正俊

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.7, pp.J204-J211, 2013

被引用文献数

2

---

Recently, augmented reality (AR) by using a projector, which is often called projection-based AR, has been focused on and widely studied. We propose a projection-based AR system, named "Lumipen" for a high-speed or high-frequency object, using a 1000-fps vision sensor and a high-speed optical axis controller. Conventional research on projection-based AR has mainly focused on static objects or circumstances. In our system, the projected direction and projected image can be controlled based on the dynamic object behavior detected by a 1000-fps vision sensor. Instead of a rotational basement, the high-speed optical axis controller is an essential subsystem to catch up with the speed of the 1000-fps vision sensor. Lumipen is expected to provide high-quality visual information addition even in dynamic live content (e.g. a play, sport game, music concert) similar to CG in video content.