Dr. Hiroyuki Morikawa Profile

Dr. Hiroyuki Morikawa

at Aoyama Gakuin Univ.

SPIE Involvement:

Author

Publications (9)

Proceedings Article | 17 March 2015 Paper

Partially converted stereoscopic images and the effects on visual attention and memory

Sanghyun Kim, Hiroyuki Morikawa, Reiko Mitsuya, Takashi Kawai, Katsumi Watanabe

Proceedings Volume 9391, 939119 (2015) https://doi.org/10.1117/12.2084842

KEYWORDS: Visualization, 3D image processing, 3D acquisition, 3D displays, Eye, 3D metrology, Time metrology, Target recognition, 3D vision, LCDs

Read Abstract +

This study contained two experimental examinations of the cognitive activities such as visual attention and memory in viewing stereoscopic (3D) images. For this study, partially converted 3D images were used with binocular parallax added to a specific region of the image. In Experiment 1, change blindness was used as a presented stimulus. The visual attention and impact on memory were investigated by measuring the response time to accomplish the given task. In the change blindness task, an 80 ms blank was intersected between the original and altered images, and the two images were presented alternatingly for 240 ms each. Subjects were asked to temporarily memorize the two switching images and to compare them, visually recognizing the difference between the two. The stimuli for four conditions (2D, 3D, Partially converted 3D, distracted partially converted 3D) were randomly displayed for 20 subjects. The results of Experiment 1 showed that partially converted 3D images tend to attract visual attention and are prone to remain in viewer’s memory in the area where moderate negative parallax has been added.

In order to examine the impact of a dynamic binocular disparity on partially converted 3D images, an evaluation experiment was conducted that applied learning, distraction, and recognition tasks for 33 subjects. The learning task involved memorizing the location of cells in a 5 × 5 matrix pattern using two different colors. Two cells were positioned with alternating colors, and one of the gray cells was moved up, down, left, or right by one cell width. Experimental conditions was set as a partially converted 3D condition in which a gray cell moved diagonally for a certain period of time with a dynamic binocular disparity added, a 3D condition in which binocular disparity was added to all gray cells, and a 2D condition. The correct response rates for recognition of each task after the distraction task were compared. The results of Experiment 2 showed that the correct response rate in the partial 3D condition was significantly higher with the recognition task than in the other conditions. These results showed that partially converted 3D images tended to have a visual attraction and affect viewer’s memory.

Proceedings Article | 6 March 2014 Paper

Disparity modifications and the emotional effects of stereoscopic images

Takashi Kawai, Daiki Atsuta, Yuya Tomiyama, Sanghyun Kim, Hiroyuki Morikawa, Reiko Mitsuya, Jukka Häkkinen

Proceedings Volume 9011, 901115 (2014) https://doi.org/10.1117/12.2042376

KEYWORDS: 3D image processing, Neodymium, 3D displays, 3D modeling, Ions, Analytical research, Information technology, Visualization, Eye, Ear

Read Abstract +

Proceedings Article | 12 March 2013 Paper

Applications of 2D to 3D conversion for educational purposes

Yoshihisa Koido, Hiroyuki Morikawa, Saki Shiraishi, Soya Takeuchi, Wataru Maruyama, Toshio Nakagori, Masataka Hirakata, Hirohisa Shinkai, Takashi Kawai

Proceedings Volume 8648, 86481X (2013) https://doi.org/10.1117/12.2008729

KEYWORDS: Surgery, 3D image processing, Computer graphics, 3D printing, Cameras, Lawrencium, Lenses, Cognition, Medicine, Image processing

Read Abstract +

Proceedings Article | 12 March 2013 Paper

A stereoscopic archive for the heritage of industrial modernization and its evaluation

Hayoung Yoon, Hiroyuki Morikawa, Kohei Ando, Keiji Ohta, Takashi Kawai

Proceedings Volume 8648, 86481Y (2013) https://doi.org/10.1117/12.2003602

KEYWORDS: 3D image processing, Buildings, Head-mounted displays, 3D displays, Visualization, Video, 3D vision, Eye, Head, Stereoscopic cameras

Read Abstract +

Proceedings Article | 16 February 2011 Paper

Psycho-physiological effects of visual artifacts by stereoscopic display systems

Sanghyun Kim, Junki Yoshitake, Hiroyuki Morikawa, Takashi Kawai, Osamu Yamada, Akihiko Iguchi

Proceedings Volume 7863, 78631Q (2011) https://doi.org/10.1117/12.872373

KEYWORDS: Visualization, 3D displays, Near infrared spectroscopy, Glasses, Eye, 3D image processing, Spatial resolution, Heart, Camera shutters, Stereoscopic displays

Read Abstract +

Proceedings Article | 15 February 2011 Paper

Ergonomic evaluation of crosstalk in stereoscopy through heart activity and forehead blood flow

Satoshi Toyosawa, Hiroyuki Morikawa, Koichi Nakano, Takashi Kawai, Chin-Sen Chen, Hung-Lu Chang, Jinn-Cherng Yang

Proceedings Volume 7863, 786311 (2011) https://doi.org/10.1117/12.872199

KEYWORDS: Heart, Blood circulation, Visibility, Near infrared spectroscopy, Video, Tolerancing, Optical spheres, Stereoscopy, Eye, Sensors

Read Abstract +

Proceedings Article | 11 February 2011 Paper

Psycho-physiological effects of head-mounted displays in ubiquitous use

Takashi Kawai, Jukka Häkkinen, Keisuke Oshima, Hiroko Saito, Takashi Yamazoe, Hiroyuki Morikawa, Göte Nyman

Proceedings Volume 7881, 788107 (2011) https://doi.org/10.1117/12.878864

KEYWORDS: Head-mounted displays, Video, Information visualization, Visualization, Heart, Eye, Sensors, Head, Multimedia, Image resolution

Read Abstract +

Proceedings Article | 28 January 2010 Paper

Ergonomic evaluation of ubiquitous computing with monocular head-mounted display

Takashi Kawai, Jukka Häkkinen, Takashi Yamazoe, Hiroko Saito, Shinsuke Kishi, Hiroyuki Morikawa, Terhi Mustonen, Jyrki Kaistinen, Göte Nyman

Proceedings Volume 7542, 754202 (2010) https://doi.org/10.1117/12.839173

KEYWORDS: Head-mounted displays, Video, Heart, Visualization, Sensors, Switching, Information visualization, Image quality, Head, Goggles

Read Abstract +

Proceedings Article | 21 May 2004 Paper

Development of a stereoscopic 3D display system to observe restored heritage

Hiroyuki Morikawa, Mami Kawaguchi, Takashi Kawai, Jun Ohya

Proceedings Volume 5291, (2004) https://doi.org/10.1117/12.526441

KEYWORDS: Cameras, LCDs, Buildings, Control systems, 3D modeling, Zoom lenses, Switches, Transparency, 3D image processing, Imaging systems

Read Abstract +

Showing 5 of 9 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years