Papers by Takefumi Hayashi
SIGGRAPH Asia 2014 Posters
The aim of our research project is to construct 'cultural capital content' that makes peo... more The aim of our research project is to construct 'cultural capital content' that makes people rediscover valuable art works in their own localities and bring the benefits of regional promotions. We have already developed the digital content of an old picture scroll of 'Landscapes of Osaka along the Yodo River (Shunboku, 1745)' using ultra-high resolution images and have presented some content with its high quality replica [Hayashi, 2014]. The present research reports on further development of interactive content for the practice of exhibitions in Osaka, Japan.
SIGGRAPH Asia 2014 Posters
Citrus plants have a long history in human societies, during which various cultivation techniques... more Citrus plants have a long history in human societies, during which various cultivation techniques have been devised to increase yields and are still being developed. King Mandarin, one of the most important citrus cultivars in southern Vietnam, is not an exception. The Southern Horticultural Research Institute, formerly the Southern Fruit Research Institute, of Vietnam (SOFRI) has been working on this issue for many years, but these techniques have rarely been utilized in southern Vietnam, and their value is not widely acknowledged either by growers or by officers of this area. The present research is an attempt to visualize the growth process of the King Mandarin trees which are treated with the appropriate cultivation technique and also to develop an interactive system for rapid extension and wide acceptance of the technique in southern Vietnam.
The Journal of The Institute of Image Information and Television Engineers, 2019
1990 IEEE International Conference on Systems, Man, and Cybernetics Conference Proceedings
Four psychological experiments using a computer graphics system were conducted to investigate hum... more Four psychological experiments using a computer graphics system were conducted to investigate human spatial recognition performance. It was found that the exponent of the power function for remembered distance decreases as the memory load increases. This exponent decrease was predicted by a psychological model based on signal detection theory. In addition, the spatial recognition process while navigating in a complicated space was examined and the capacity of the spatial memory clarified.<<ETX>>
International Journal of Psychology, 2016
Technical report of IEICE. HIP, 2014
paniment, and the chances are that you will hear lots of stirring major chords. The Star-Spangled... more paniment, and the chances are that you will hear lots of stirring major chords. The Star-Spangled Banner is a perfect example: When you sing "Oh say, can you see?" you are singing the three notes (one of them raised an octave) of a major chord. Now think of a wistful, pensive song, and there is a good chance that the mood will be set by minor chords. For example, in the Beatles' Yester day, when Paul McCartney intones "Why she had to go, I don't know, she wouldn't say," the notes "why-had go" form a minor triad. Music theorists were, of course, aware of the different emotional reso
IEEJ Transactions on Electronics, Information and Systems, 2021
Technical report of IEICE. PRMU, 2012
The Proceedings of the Annual Convention of the Japanese Psychological Association, 2010
The Proceedings of the Annual Convention of the Japanese Psychological Association, 2010
The Proceedings of the Annual Convention of the Japanese Psychological Association, 2011
The Proceedings of the Materials and processing conference, 2000
Journal of Psychology Research, 2011
A visible-surface can be reconstructed either from binocular disparity or motion parallax, and se... more A visible-surface can be reconstructed either from binocular disparity or motion parallax, and several previous studies have revealed the similarity of the surface properties from either type of reconstruction. In the present research, we have studied the ability for interpolation of reconstructed surfaces, that is, a gap-spanning task was conducted using both static and dynamic random dot patterns which give the same surface perception viewed binocularly and monocularly. We found that: (1) The ability for surface interpolation based on binocular disparity is more effective than that based on motion parallax; and (2) The experimental data correspond to the simulation result of a computational model is based on standard regularization theory. Based on these results, the brain mechanisms of surface reconstruction were discussed.
JSME international journal. Ser. 1, Solid mechanics, strength of materials, 1988
JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry, 1991
i-Perception, 2012
It is well known that depth can be perceived from motion parallax. To produce motion parallax, ob... more It is well known that depth can be perceived from motion parallax. To produce motion parallax, observers (with head movement) or objects (without head movement) need to move. In previous studies, the magnitude of perceived depth with head movement was compared with that without head movement using several corrugated surfaces. It was found that perceived depth with head movement was larger than that without head movement. The purpose of the present research was to investigate the influence of discontinuities on the perceived surface. We used stair-like (square-wave) stimuli, and investigated the magnitude of perceived depth with or without head movement. We found that: (1) the magnitude of perceived depth increased as the number of square-waves increased. (2) There was a tendency to perceive larger depth with head movement than without head movement, but the difference between magnitudes of depth with and without head movements decreased as the number of square-waves increased. (3) Observers tended to perceive 4-and 6-step square-wave stimuli as continuous. (4) For the 2-step square-wave stimulus, observers tended to grossly underestimate the magnitude of depth or could not perceive depth at all. These findings suggest the possibility that perception of increased depth is caused by the perception of surfaces as continuous.
Journal of the Magnetics Society of Japan, 1989
This report describes a technique for detecting head disk media contact in order to evaluate perp... more This report describes a technique for detecting head disk media contact in order to evaluate perpendicular magnetic disk media. The detector uses a small piezoelectric transducer(PZT) , attached to the flying head slider, called PZT-Contact Detection Sensor(PCS). It is most useful for evaluating microscopic projections and dust particles adhering to the perpendicular magnetic disk medium surface which could result in head crash. Experimental results and analyses of AE signals derived from the PCS were detailed. To improve the SNR of an AE signal from the PCS, a new frequency converter circuit with a mixer and a new type of PZT , called D-PZT , was developed. Additionally the mechanism of AE signal production from the PCS when head comes in contact with or passes over a projection on the media surface was also clarified.
Transactions of the Japan Society of Mechanical Engineers Series C, 1989
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Papers by Takefumi Hayashi