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Displaying 1-16 of 16 articles from this issue
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Article type: Cover
Pages Cover1-
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (12K) -
Article type: Index
Pages Toc1-
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (41K) -
Yoshihide SAITO, Yuichiro KUMEArticle type: Article
Session ID: HI2015-45/3DIT2015-1
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSMulti-modal sensations in addition to visual and auditory sensations are expected to be used for image and information equipment in order to enhance realties. Tactile and force displays have been studied and available commercially as somatic sensation display. Toward future systems, thermal displays are to be studied. Our research goal is to construct non-contact thermal displays to be used for image and information equipment. In this study, heat radiation with a near-infrared lamp and convection with weak cool air flow were employed to transmit thermal information to human skin. In this paper, feasibilities of this thermal display technique and thermal properties obtained by experiments are described.View full abstractDownload PDF (576K) -
Naoya SUZUKI, Wataru TERAMOTOArticle type: Article
Session ID: HI2015-46/3DIT2015-1
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSNeurophysiological studies demonstrate that somatosensory neurons in parietal lobe of monkeys can respond to visual stimulus presented in peripersonal space. Interestingly, some of these neurons are reported to respond to visual stimulus presented in the peripersonal space not only near the monkeys' body part but also in the corresponding space of their partner who faced them. A recent fMRI study showed the shared representations of peripersonal space in humans as well. The aim of the present study was to provide the behavioral evidence for such representations in humans by using psychophysical measurements.View full abstractDownload PDF (570K) -
Misae YAGI, Mie SATOArticle type: Article
Session ID: HI2015-47/3DIT2015-1
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSRecently, 3D printers with which you can create 3-Dimentional objects have come into the market. Also, 3-Dimentional modeling systems have been developed for modeling the 3-Dimentional shape of objects to print. However, it is necessary to learn hard how to operate these systems to model the 3-Dimentional shape. In this study, we aim to reduce complexity in modeling the 3-Dimentional shape, and propose a 3-Dimentional modeling system using an infrared sensor with which a user can model the 3-Dimentional shape intuitively with bare hands.View full abstractDownload PDF (773K) -
Sota SUZUKI, Mie SATOArticle type: Article
Session ID: HI2015-48/3DIT2015-1
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn this study, we aim to reduce incongruity in interaction between a user and a virtual object, and examine whether he/she perceive haptic feedback by pseudo-haptics effects in our augmented reality (AR) system that can allow the user to grasp the virtual object with a bare hand. Using our AR system, we conduct an impression evaluation experiment on grasping the virtual object by changing hardness and materials of the virtual object, and investigate there results to find effectiveness and problems of using pseudo-haptics effects in our AR system.View full abstractDownload PDF (9503K) -
Makoto NISHINO, Takeshi KOHAMA, Hisashi YOSHIDAArticle type: Article
Session ID: HI2015-49/3DIT2015-1
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn this study, we performed a simulation experiments using a mathematical model of a wide-scale retinal network considering the receptive fields' properties in parafovea. Vertical sinusoidal grating patterns and random dot patterns, which consist of particular spacial frequencies, were given as input patterns. We computed the retinal ganglion cells responses which were composed of either a high or a low spacial frequency. Simulation results of grating pattern input suggest that microsaccades enhance the membrane potential of ganglion cells for the low-frequency pattern, and as for the high-frequency patten, it is influenced by drifts and tremor, particularly on the responses of M-type cells under both conditions. On the other hand, they do not influence the activity of M- or P-type cells when any random dot pattern inputs was given. These results suggest that the strength of the effects derived by fixation eye movements on the retinal responses depend on the nature of the input patterns.View full abstractDownload PDF (9124K) -
Ken TOKUDOME, Takeshi KOHAMA, Sho KIKKAWA, Hisashi YOSHIDAArticle type: Article
Session ID: HI2015-50/3DIT2015-1
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn this study, we propose a mathematical model of fixation eye movements controlled by visual attention mechanisms to establish an index for quantitative evaluation of higher-order cognitive functions. It is known that Mean Square Displacement (MSD) profiles of fixation eye movements show a crossover phenomenon (Engbert & Kliegl. 2004), which indicates that multiple external factors contribute to control of movements. We formulated a model based on a hypothesis that stable gazing is controlled by rectifying retinal errors by drifts and microsaccades. Simulation results suggest that fractional Brownian motion and continuous feedback to correct gaze positions yield the MSD profile of fixation eye movements. Furthermore, microsaccades contribute to modulate the MSD profile during short-range lags.View full abstractDownload PDF (595K) -
Quantitative assessments of arousal level by analyzing fixation eye movements and pupil fluctuationsShogo HONDA, Takeshi KOHAMA, Hisashi YOSHIDAArticle type: Article
Session ID: HI2015-51/3DIT2015-1
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSPrevious studies have shown that microsaccade (MS) rates increase and pupil diameters continuously constrict antecedent to the occurrence of slow eye movements (SEMs). Since SEMs occur in connection with the depression of arousal, fixation eye movements and pupil fluctuations are candidate indicators to monitor arousal states. However, SEM detection methods of these studies are not sufficiently accurate. In this study, we propose a new SEM detection method to extract SEMs as sections and analyze MS rates and pupil fluctuations before the starting point of each SEM section. The results clearly show that gradual rise of MS rate and longitudinal miosis are observed prior to the initiation of SEMs, and these properties become more distinctive when they are restricted to primal SEMs. Moreover, we performed similar experiment using more precise equipment and the results show that periodical MS rate heave associated with nystagmus appears approximately two minutes prior to SEMs. This indicates that these profiles might be able to be used to estimate arousal states quantitatively.View full abstractDownload PDF (3648K) -
Ikuta KODANI, Atsuo YOSHITAKAArticle type: Article
Session ID: HI2015-52/3DIT2015-1
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIt is important to clarify the main subject in order to take 'good' photograph. Composition and depth of field are known as the techniques to make the subject visible. In this paper, we propose a shooting assistance method based on the composition and the depth of field. According to our preliminary survey, we found that professional photographers adjust the depth of field in accordance with the type of composition and the size of main subject. In the proposed method, we focus on the relation between the composition and the depth of field when a user to take photographs. It makes a resultant photograph visible in the sense of the theme by suggesting appropriate aperture operation considering the composition. Experimental result showed that photographs taken with the assistance of the proposed method follows more to the degree of adjustment of the depth of field by professionals than those taken by non-expert users without assistance.View full abstractDownload PDF (4270K) -
Tomohiro SAKAI, Kazuho FUKUDA, Keiji UCHIKAWA, Toshifumi MIHASHIArticle type: Article
Session ID: HI2015-53/3DIT2015-1
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe purpose of this work is to examine the chromatic property of color-discrimination of illuminant. For experiment, we use illuminant stimuli that obtain spectral distributions as similar as CIE daylight illuminants by solving constrained linear least squares problem. Five types of hyperspectral natural images illuminated by these illuminant stimuli were presented on the hyperspectral display. The results show that (1) thresholds of illuminant color-discrimination are larger than those of color discrimination and (2) thresholds of illuminant color-discrimination along D-direction that follows the daylight locus are larger than those along of N-direction that is negative line of D-direction.View full abstractDownload PDF (6312K) -
Tetsuya MURAOKA, Hiroaki IKEDAArticle type: Article
Session ID: HI2015-54/3DIT2015-2
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSVisual fatigue will be caused by PC operations for a long time a day, which might fail health of human eyes if it continues a week or more. Any action to check it by oneself needs to be done every time PC operations are continued for a multiple of hours. We propose a visual fatigue checker to simply test the fatigue of human eyes and to help us to resume visual health from the fatigue, if any, with some expected recovery time.View full abstractDownload PDF (6709K) -
Makoto TADENUMA, Toshiya MORITAArticle type: Article
Session ID: HI2015-55/3DIT2015-2
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSAs the screens of home TVs become larger, the number of viewers, who feel a sense of unpleasantness from shaking images may increase. In order to find and revise the images, which make viewers unpleasant, efficiently at the production stage, the authors have been developing a technique which automatically estimates the unpleasantness degree invoked by shaking images. However, it was found that the actually measured unpleasantness degree for ordinary images in broadcasting program is often significantly lower or higher than the estimated one using the developed method so far. The authors considered the causes of the occurring errors, and thought out a new method to reduce the estimation error. As a result of psychological estimation experiments with 96 "On Air" images, it was confirmed that the new method has an effect to reduce estimation error by approximately 30%.View full abstractDownload PDF (655K) -
Article type: Appendix
Pages App1-
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (81K) -
Article type: Appendix
Pages App2-
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (81K) -
Article type: Appendix
Pages App3-
Published: March 03, 2015
Released on J-STAGE: September 22, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (81K)
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