&lt;title&gt;New stereoscopic video camera and monitor system with central high resolution&lt;/title&gt;

Matsunaga, Katsuya; Nose, Yasuhiro; Minamoto, Masahiko; Shidoji, Kazunori; Ebuchi, Kazuhisa; Itoh, Daisuke; Inoue, Tomonori; Taketo, Hayami; Matsuki, Yuji; Arikawa, Yuko; Matsubara, Kenjiro

doi:10.1117/12.307160

Cited by 10 publications

(6 citation statements)

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“…The Q stereoscopic video system was able to improve the performance of teleoperation and depth perception more than the conventional stereoscopic video system [2,11,13]. However, the Q stereoscopic video system requires four video signal channels to produce compound images.…”

Section: Introductionmentioning

confidence: 93%

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Stereoscopic video system with embedded high spatial resolution images using two channels for transmission

Ienaga

Matsunaga

Shidoji

et al. 2001

Proceedings of the ACM Symposium on Virtual Reality Software and Technology

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Teleoperation requires both wide vision to recognize a whole workspace and fine vision to recognize the precise structure of objects which an operator wants to see. In order to achieve high operational efficiency in teleoperation, we have developed the Q stereoscopic video system which is constructed of four sets of video cameras and monitors. It requires four video channels to transmit video signals. However, four channels are not always available for a video system because of the limitation of the number of radio channels when multiple systems are used at the same time. Therefore we have tried to reduce the number of channels on this system by sending images from the right and left cameras alternately by field. In experiment 1, we compared the acuity of depth perception under three kinds of stereoscopic video systems, the original Q stereoscopic video system, the Q stereoscopic video system with two channel transmission, and the conventional stereoscopic video system. As the result of the experiment, the original Q stereoscopic video system enabled us to perceive depth most precisely, the Q stereoscopic video system with two channel transmission less so, and the conventional stereoscopic video system even less. In experiment 2, we compared the Q stereoscopic video system with two channel transmission to the original Q stereoscopic video system. The result showed that the operators were able to work more efficiently under the original Q stereoscopic video system than under the Q stereoscopic video system with two channel transmissions. In experiment 3, we compared the Q stereoscopic video system with two channel transmission to the conventional stereoscopic video system. It was found out in this study that the new stereoscopic video system we developed enabled operators to work more efficiently and to perceive depth more precisely than the conventional stereoscopic video system, although the number of channels for image transmission of this system was equal to that of the conventional stereoscopic video system.

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Section: Introductionmentioning

confidence: 93%

“…We developed the Q stereoscopic video system which is able to display wide-angle and high-resolution images simultaneously [2,11,13]. This system was designed with regard to human vision, which has high-resolution in the central area and low-resolution in the periphery.…”

Section: Introductionmentioning

confidence: 99%

Stereoscopic video system with embedded high spatial resolution images using two channels for transmission

Ienaga

Matsunaga

Shidoji

et al. 2001

Proceedings of the ACM Symposium on Virtual Reality Software and Technology

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“…When a subject actually works in the real work spot, force, tactile, and acoustic senses are also used besides vision. In the conventional type of teleoperated robots, the lack of sense information except vision may be the reason for the inefficient cognition of working space 6,7) . There were some studies which tried to improve the performance of the teleoperation by providing sense information which subjects usually use in a real working spot 8,9,10) .…”

Section: Introductionmentioning

confidence: 99%

Effect of force and acoustic feedback on teleoperation work

2003

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It has been reported that the operation efficiency during teleoperation under stereoscopic video images is inferior to that of using the naked eye on the spot in real working environments. One of the reasons to explain this might be the smaller amount of information which is provided to the subject when working under stereoscopic images compared with that gotten by direct viewing in the real working environment. In our daily lives, we obtain information through various senses; the visual sense, acoustical sense, tactile sense and so on. The smaller amount of information causes a low working performance in the teleoperation. Some papers showed the improvement of operation efficiency when the subject got acoustic and/or tactile feedback as well as visual feedback in a simulated environment. We investigated to clarify the effects of force and acoustic feedback information with stereoscopic video images to subjects on the performance of the teleoperation using an actual robot. In experiment 1, we used the teleoperated system in which subjects could control the robot arm (the slave manipulator) to pick up cylindrical objects and to insert them in a hole by operating the input-and-tactile-information-display-system (the master manipulator). The results of experiment 1 showed that the force and acoustic information did not improve the working performance, and rather interfered with it. In experiment 2, we investigated the operation efficiency under conditions that force or acoustic feedback was given in the teleoperated work by eliminating contact information acquirable from vision. As a result of the experiment, force and acoustic information was not an effective way to shorten the completion time when the actual teleoperated robot was used.

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“…Regrettably HDTV is too expensive for many sites and still insufficient for the human vision system. We developed the new stereoscopic video system that gave the operators compound images 1,2) . Its images had the high-resolution area in the center and the wide projected area in its surroundings.…”

Section: Introductionmentioning

confidence: 99%

<title>Effect of overlap rate between stereoscopic images on performance in a teleoperation</title>

et al. 2001

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According to the results of the simulated teleoperation experiment, the larger the ratio of the overlapping area of stereoscopic images, the smaller the completion times and the number of errors. For this paper we did an experiment using the actual stereoscopic video system. We examined the performance of the teleoperation of an insert task in two experiments. In experiment 1, we set three fixed overlap rate conditions for the stereoscopic image pairs. (High overlap rate condition): The convergence point of the two cameras was set at the goal point where a cylindrical object was inserted. When subjects fixated their eyes on the goal point, the overlap rate of the images from the cameras was 95%. (Middle overlap rate condition): The convergence point of the cameras was set at the center of the working area. When subjects fixated their eyes on the goal points, it was 76.7%. (Low overlap rate condition): Convergence point of the camera was set at the point in the situation where the ratio of the overlapped area was 49% when subjects fixated to the goal point. Completion times and the numbers of errors of the insert task were measured. As a result, these were smallest at the high overlap rate condition. In experiment 2, we compared the performance between a fixed and a variable overlap rate conditions in a pick-and-insert task. The experimental results suggested that the number of errors of variable overlap rate condition was less than that of the fixed condition although the completion time of the former condition was not shorter than that of the latter condition.

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<title>New stereoscopic video camera and monitor system with central high resolution</title>

Cited by 10 publications

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Stereoscopic video system with embedded high spatial resolution images using two channels for transmission

Stereoscopic video system with embedded high spatial resolution images using two channels for transmission

Effect of force and acoustic feedback on teleoperation work

<title>Effect of overlap rate between stereoscopic images on performance in a teleoperation</title>

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