| 1. |
Tsukasa Muraya, Hikari Hamasaki, Momoka Nagatomi, Reina Chikara, Takuya Harada and Shoji Sunaga , Development and Evaluation of a Color Scheme Training Application for Digital Devices in Color Education, Proceedings of the 2022 Conference of Asia Colour Association, 175-180, 2022.10. |
| 2. |
Kajitsu Yoshitake, Kyoko Kido, Satoshi Hano, Shigehito Katsura, Shoji Sunaga, Development of a color sample set from the viewpoint of dichromats for color universal design, Proceedings of the 5th Conference of Asia Colour Association, 616-671, 2019.11. |
| 3. |
Takeharu Seno, Masaki Ogawa, Shoji Sunaga, Hiroyuki Ito, Effects of colors on the illusory self-motion perception (vection), Proceedings of the 5th Conference of Asia Colour Association, 672-674, 2019.11. |
| 4. |
Shigehito Katsura, Yoshino Tanaka, Kei Kawamoto, Shoji Sunaga, Emotional responses of dichromats to colors and color names, Proceedings of the 5th Conference of Asia Colour Association, 675-680, 2019.11. |
| 5. |
Rachapoom Punsongserm, Shoji Sunaga, Hisayasu Ihara, Effectiveness of homologous Thai letterforms presented in parafoveal vision, Information Design Journal, https://doi.org/10.1075/idj.00002.pun, 24, 2, 92-115, 2018.12. |
| 6. |
Hirohisa Yaguchi, Rentaro Suto, Shigehito Katsura, Shoji Sunaga, Aging Effect of Observer Metamerism for Wide Color Gamut Display, Proceedings of the 4th Conference of Asia Colour Association, 207-211, 2018.12. |
| 7. |
Yusuke Hishikawa, Shigehito Katsura, Shoji Sunaga, Influence of Difference in S-Cone Stimulus Value between Target and Distractors on Visual Search Task, Proceedings of the 4th Conference of Asia Colour Association, 227-230, 2018.12. |
| 8. |
Shoji Sunaga, Rentaro Suto, Shigehito Katsura, Hirohisa Yaguchi, Observer Metamerism in Wide Color Gamut Display for Anomalous Trichromats, Proceedings of the 4th Conference of Asia Colour Association, 236-240, 2018.12. |
| 9. |
Shoji Sunaga, Rentaro Suto, Shigehito Katsura, Hirohisa Yaguchi, Observer Metamerism for Anomalous Trichromats and the Elderly in a Wide Color Gamut Display, Proceedings of International Display Workshop ’18, 1046-1049, 2018.12. |
| 10. |
A proposal of a color universal design method based on the viewpoint of dichromacy using categories of color name designation. |
| 11. |
Survey on concerns and knowledge of color vision deficiencies to teachers at kindergartens and nursery schools. |
| 12. |
Yusuke Hishikawa, Shigehito Katsura, Shoji Sunaga, Influence of the Number of Distractor Colors on Performance in the Visual Search Task Cued by S-cone Stimulus Value, Proceedings of the International Colour Association AIC Color 2018 Lisbon, 693-703, 2018.09. |
| 13. |
Kyoko Kido, Shigehito Katsura, Shoji Sunaga, Categories on a Color Plane Constituted by Yellow-blue and Lightness in Dichromats, Proceedings of the International Colour Association AIC Color 2018 Lisbon, 751-775, 2018.09. |
| 14. |
Shigehito Katsura, Shoji Sunaga, Categorical Color Naming in Anomalous Trichromats for Color Stimuli with Different Durations, Proceedings of the International Colour Association AIC Color 2018 Lisbon, 699-703, 2018.09. |
| 15. |
Evaluation of Universal Design Fonts 1 - Aesthetics Evaluation and the Visual Attributes of Typefaces that Affects it as Factors. |
| 16. |
Analysis of confusing colors of crayons: to discover color deficiency from color usages in children’s crayons. |
| 17. |
Comparisons of visual search performances cued by the S-cone stimulus value between trichromats and severe anomalous trichromats. |
| 18. |
Rachapoom Punsongserm, Shoji Sunaga, Hisayasu Ihara, Thai Typefaces (Part 2): Criticism Based on Legibility Test of Some Isolated Characters, Archives of Design Research, 30, 2, 23-45, 2017.05. |
| 19. |
Rachapoom Punsongserm, Shoji Sunaga, Hisayasu Ihara, Thai Typefaces (Part 1): Assumption on Visibility and Legibility Problems, Archives of Design Research, https://doi.org/10.15187/adr.2017.02.30.1.5, 30, 1, 5-23, 2017.02. |
| 20. |
Tomomi Koizumi, Hiroyuki ITO, Shoji Sunaga, Masaki Ogawa, Directional Bias in the Perception of Cast Shadows, i-Perception, 10.1177/2041669516682267, 1-17, 2017.01, Previous studies have demonstrated that the perception of shading is based upon assumptions about lighting direction, for example, light from above. However, it is not clear whether these assumptions are used in the perception of cast shadows. Moreover, it is unclear whether a perceptual interaction exists between shading and cast shadows because until now they have been studied separately. In this study, we investigated through three experiments whether the light-from-above (or another direction) assumption is used in interpreting ambiguous cast shadows, and whether shading information influences the interpretation of cast shadows. Our results indicate the existence of the light-from-above assumption in interpreting cast shadows. Consistent shading information enhanced the interpretation, and judgments of lighting direction were also based on both cast shadow and shading information. However, the perceptual determination of shape from shading was relatively independent of the cast shadow interpretation or the lighting direction judgments of the scene.. |
| 21. |
Shigehito Katsura, Sachiyo MItsuyasu, Shoji Sunaga, Superiority of dichromats in visual search task cued by S-cone stimulus value, Proceedings of the International Colour Association AIC Color 2016 Santiago, 120-123, 2016.10. |
| 22. |
Shigeko Kitamura, Jun Tsuchiya, Shoji Sunaga, Visual Evaluation of a Wooden-finish Room and the Colorimetry of Wood, Proceedings of the International Colour Association AIC Color 2015 Tokyo, 1221-1224, 2015.05. |
| 23. |
Shigehito Katsura, Shoji Sunaga, A Proposal of Colour Universal Design Game for Learning Dichromats’ Confusion Colours, Proceedings of the International Colour Association AIC Color 2015 Tokyo, 954-957, 2015.05. |
| 24. |
Wataru nakashima, Shoji Sunaga, Seno Takeharu, Naoyuki Oi, Investigation of Spectral Power Distributions of LED Light sources to Provide Preferred Colored of Natural Objects, Proceedings of the 12th Congress of the International Colour Association AIC Color 2013 Newcastle upon Tyne, 655-658, 2013.07. |
| 25. |
Hiroyuki ITO, Masaki Ogawa, Shoji Sunaga, Evaluation of an organic light-emitting diode display for precise visual stimulation, Journal of Vision, 13, 7 article 6, 1-21, 2013.06. |
| 26. |
Shoji Sunaga, Tomomi Ogura, Takeharu Seno, Evaluation of a dichromatic color-appearance simulation by a visual search task, Optical Review, 20, 2, 83-93, 2013.04, We used a visual search task to investigate the validity of the dichromatic simulation model proposed by Brettel et al.
Although the dichromatic simulation could qualitatively predict reaction times for color-defective observers, the
reaction times for color-defective observers tended to be longer than those of the trichromatic observers in
Experiment 1. In Experiment 2, we showed that a reduction of purity excitation of simulated colors can provide a good
prediction. Further, we propose an adaptive dichromatic simulation model based on the color differences between a
simulated target color and simulated distractor colors in order to obtain a better quantitative prediction of reaction times
in the visual search task for color defects.. |
| 27. |
Takahru Seno, Takahiro Kawabe, Hiroyuki ITO, Shoji Sunaga, Vection modulates emotional valence of autobiographical episodic memories, Cognition, 126, 115-120, 2012.10. |
| 28. |
Genki Yamasaki, Shoji Sunaga, Takeharu Seno, Tomoaki Kozaki, Examination of a suitable lighting for a nap in a resting room of an office, Proceedings of the International Colour Association AIC Color 2012 Taipei, pp.759-762, 2012.09. |
| 29. |
Takahru Seno, Hiroyuki ITO, Shoji Sunaga, Stephen Palmisano, Hunger enhances vertical vection, Perception, 41, 1003-1006, 2012.09. |
| 30. |
Takahru Seno, Stephen Palmisano, Hiroyuki ITO, Shoji Sunaga, Vection can be induced without global motion awareness., Perception, 41, 493-497, 2012.05. |
| 31. |
Takahru Seno, Hiroyuki ITO, Shoji Sunaga, Vection can be induced in the absence of explicit motion stimuli, Experimental Brain Research
, 10.1007/s00221-012-3083-y, 291, 235-244, 2012.03, The present study utilized two separate experiments
to demonstrate that illusory self-motion (vection) can
be induced/modulated by cognition. In the Wrst experiment,
two curved lines, which simulated road edges seen while
driving at night, were employed. Although the lines
induced adequate strength of forward vection, when one of
the lines was horizontally reversed, vection was signiWcantly
reduced. In the second experiment, two static converging
lines with moving characters, which simulated side
edges of a straight road with a traYc sign, were utilized.
The road sign moved only during the Wrst 5 s. After the sign
disappeared, only static lines or a blank screen were able to
induce vection. These results suggested that vection was
largely aVected by cognitive factors and that vection could
be induced by implicit motion stimuli.. |
| 32. |
Takeharu Seno, Masaki Ogawa, Hiroyuki Ito, Shoji Sunaga, Consistent air flow to the face facilitates vection, Perception, 40, 10, pp.1237-1240, 2011.10, We examined whether a somatosensory cue suggesting forward self-motion facilitated vection. We provided a consistent air flow to subjects’ faces by using an electric fan. Vection strength was increased when the air flow was provided.
. |
| 33. |
Takeharu Seno, Shuichiro Taya, Hiroyuki Ito, Shoji Sunaga, The mental number line in depth revealed by vection, Perception, 40, 10, pp.1241-1244, 2011.10, To explore how numbers are represented in depth in our mental space, we asked participants to sequentially speak random numbers while they observed forward/backward vection. We found that participants tended to generate larger numbers when they perceived backward self-motion. The results suggest that numerical magnitudes were topographically mapped onto our mental space from front to rear in an ascending order. . |
| 34. |
Go Matsumoto, Shoji Sunaga, Takeharu Seno, Contribution of colour and texture information to the recognition of
natural objects, Proceedings of the International Colour Association AIC Color 2011 Zurich, pp.564-567, 2011.06, Various visual attributes i.e. shape, colour, and texture etc, contribute to the recognition of natural
objects. The colours of natural objects which we memorize are known as the memory colours of
the object. It is well known that memory colours have higher saturation than the colours of the real
natural objects have. In most of the past studies about memory colour, uniformly-coloured patches
were used as stimuli, and the interaction between texture and memory colour wasn’t investigated.
In this study, we investigated whether texture information of a natural object had an influence on
memory colour of the object or not. We measured the plausibility of colour with or without texture
information of a cabbage and a piece of a watermelon. The results showed that the most plausible
colour for the coloured textured patch had lower saturation than that for the uniform patch had.
The colour region which provided high plausibility evaluations was smaller for the coloured
textured patch than for the uniformly-coloured patch. These results suggest the addition of texture
information restricts the colour region which provides high plausibility as the colour of the natural
object.. |
| 35. |
Tomomi Ogura, Shoji Sunaga, Takeharu Seno, The evaluation of dichromatic simulation by a visual search task, Proceedings of the International Colour Association AIC Color 2011 Zurich, pp.617-620, 2011.06, Dichromatic simulations (Brettel et al. 1997) are used widely in social and educational
environments. We evaluated the validity of dichromatic simulation by using a visual search task.
The stimulus images consisted of 13 coloured disks (one target and 12 distractors). Two colours
were assigned to 6 disks as distractor, respectively. Six trichromats and three strongly anomalous
trichromats participated in this experiment. The observer’s task was to detect the target colour
which was different from other disks as soon as possible. The reaction times (RTs) of the
dichromatic simulated colour stimulus for the trichromats were qualitatively similar to those of
the original colour stimulus for the anomalous trichromats. However, the RTs of the anomalous
trichromats tended to be longer than those of normal trichromats in some particular colour
combinations. Thus there is a possibility that the simulation overestimates the dichromats’ colour
detection. We can conclude that the simulation of the dichromats does not always agree with the
real dichromatic people’s colour perception.. |
| 36. |
Shoji Sunaga, Yellow-blue colour discrimination in red-green colour deficiency, Proceedings of the International Colour Association AIC Color 2011 Zurich, pp.759-762, 2011.06, We measured the colour discrimination thresholds on the equal-luminance colour plane of
CIE1976u’v’ UCS diagram for trichromats and red-green colour-deficient trichromats. We
compared between their thresholds in the yellow-blue direction. The results showed that the
thresholds in yellow-blue colour changes for the red-green colour-deficient trichromats were not
always larger than those for the normal trichromats. Further, our data suggest that the poor ability
of the yellow- blue colour discrimination for the trichromats was caused by the interaction between
the L-M mechanism and the S mechanism, although the S mechanism acts in the same way for
both the red-green colour-deficient observers and the normal trichromatic observers.. |
| 37. |
Erika Tomimatsu, Hiroyuki Ito, Shoji Sunaga, Gerard B. Remijn, Halt and recovery of illusory motion perception from peripherally viewed static images, Attention, Perception & Psychophysics, Vol.73, pp.330-335, 2011.05. |
| 38. |
Takeharu Seno, Hiroyuki Ito, Shoji Sunaga, Self-motion perception compresses time experienced in return travel, Perception, 40, 4, pp.497-499, 2011.04, It is often anecdotally reported that time experienced in return travel (back to the start
point) seems shorter than time spent in outward travel (travel to a new destination). Here, we report
the first experimental results showing that return travel time is experienced as shorter than the
actual time. This discrepancy is induced by the existence of self-motion perception.. |
| 39. |
Takeharu Seno, Hiroyuki Ito, Shoji Sunaga, Inconsistent locomotion inhibits vection
, Perception, 40, 6, pp.747-750, 2011.04, We measured the strength of illusory self-motion perception (vection) with and without locomotion on a treadmill. The results revealed that vection was inhibited by inconsistent locomotion, but facilitated by consistent locomotion.
. |
| 40. |
Shinji Nakamura, Takeharu Seno, Hiroyuki Ito, Shoji Sunaga, Coherent modulation of stimulus colour can affect visually induced self-motion perception, Perception, Vol.39, pp.1579–1590, 2010.12. |
| 41. |
Hiroyuki Ito, Shoji Sunaga, Erika Tomimatsu, Yukiko Ogata, Rapid learning in walking observers wearing a reversing or inverting prism, Perception , Vol.39, pp.1354-1364, 2010.10. |
| 42. |
Takeharu Seno, Hiroyuki Ito, Shoji Sunaga, Vection aftereffect from expanding / contracting stimuli, Seeing & Perceiving, Vol.23, pp.273-294, 2010.07. |
| 43. |
Takeharu Seno, Shinji Nakamura, Hiroyuki Ito, Shoji Sunaga, Static visual components without depth modulation alter the strength of vection, Vision Research, Vol.50, pp.1131-1139
, 2010.06. |
| 44. |
ErikaTomimatsu, Hiroyuki Ito, Takeraru Seno, Shoji Sunaga, The ‘Rotating Snakes’ in smooth motion do not appear to rotate. , Perception, 2010.05. |
| 45. |
Takeharu Seno, Hiroyuki Ito, Shoji Sunaga , and Shinji Nakamura, Temporonasal motion projected on the nasal retina underlies expansion-contraction asymmetry in vection. , Vision Research, In Press. (2010)
, 2010.04. |
| 46. |
Takeharu Seno, Hiroyuki Ito, Shoji Sunaga, The object and background hypothesis for vection, Vision Research, Vol.49, pp.2973-2982 , 2009.10. |
| 47. |
Influences of hue difference and element size on global color impressioms of two-colored textured patterns. |
| 48. |
Shoji Sunaga, Measurement of global brightness impression of the multicoloured textured pattern, Proceedings of the 11th Congress of the International Colour Association AIC Color 2009 Sydney, 0909015Final00129.pdf in CD-ROM, 2009.09. |
| 49. |
Yukyu Araragi, Hiroyuki Ito, Shoji Sunaga, Perceptual filling-in of a line segment presented on only one side of the blind spot, Spatial Vision, Vol.22, pp.339-353, 2009.08. |
| 50. |
Jun Tsuchiya, Shoji Sunaga, Visual effects of building stone texture, 11th International Conference on Durability of Building Materials and Components, T15-130, 2008.09. |
| 51. |
Yukyu Araragi, Hiroyuki Ito, Shoji Sunaga, Appearance of an illusory object in the blind spot, Perception, Vo1.37 1301-1304, 2008.08. |
| 52. |
Shoji Sunaga, Masayuki Sato, Natsuko Arikado, Hiroshi Jomoto, A static geometrical illusion contributes largly to the footsteps illusion, Perception, Vol.37 pp.902-914, 2008.06. |
| 53. |
Shoji Sunaga, Yukio Yamashita, Global color impression of multicolored textured patterns with equal unique hue elements, Color Research and Application, Vol.32, pp.267-277, 2007.08. |
| 54. |
Shoji Sunaga, Yukio Yamashita, Investigation on chromatic mechanism mediating the whole color impressions from multi-colored texture patterns, Proceedings of the 1st International Workshop on KANSEI 2006, pp.114-116, 2006.02. |
| 55. |
Shoji Sunaga, Yukio Yamashita, Color impressions from multi-colored texture patterns are not based on colorimetric averages of their elements' colors, Proceedings of the 10th Congress of the International Colour Association AIC Color 2005 Granada, pp.1131-1134, 2005.05. |
| 56. |
Yukio Yamashita, Philsu Lee, Shoji Sunaga, Thresholds of color attribute differences in detecting comouflaged textures, Journal of Physiological Anthropology and Applied Human Science, Vol.23, 237-241, 2005.01. |
| 57. |
Effects of Color and Luminance Stimuli on Kanizsa Shrinkage Illusion, Rie Ishida, Shoji Sunaga, and Sachio Nakamizo, Vision, Vol.17 1-9 (2005) [in Japanese with English abstract]. |
| 58. |
Shoji Sunaga, Yukio Yamashita, Evaluation of the color impression of colored texture patterns by a color naming method, Proceedings of the International Colour Association AIC Color 2004 Porto Alegre, pp.13-17, 2004.10. |
| 59. |
Shoji Sunaga, Yukio Yamashita, Test of the Additivity of a Color Impression from Colored Texture Pattern, Proceedings of the International Colour Association AIC Color 2003 Bangkok, pp.35-38, 2003.08. |
| 60. |
Shoji Sunaga, Satoshi Shioiri, Hirohisa Yaguchi, Luminance type additive mechanism produces shading, Optical Review, vol.7, pp.260-265, 2000.01. |
| 61. |
Shoji Sunaga, Satoshi Shioiri, Hirohisa Yaguchi, Spectral luminous efficiency and additivity test for shading perception, Proceedings of the 8th Congress of the International Colour Association AIC Color 1997 Kyoto, pp.322-325, 1997.07. |
| 62. |
Shoji Sunaga, Satoshi Shioiri, Hirohisa Yaguchi, Souichi Kubo, Effect of spatial frequency on the equal-luminance point for the mechanism of shape from shading, Optical Review, vol.2, pp.81-84, 1995.01. |
| 63. |
Norihisa Kobayashi, Shoji Sunaga, Ryo Hirohashi
, Effect of additive salts on ion conductivity characteristics in solid polymer electrolytes, Polymer, Vol.33, No.14, pp.3044-3048
, 1992.07. |
| 64. |
Satoshi Shioiri, Shoji Sunaga, Souichi Kubo, Luminance is the intensity dimension of shading, OSA Advances on Color Vision Topical Meeting, pp.217-219, 1992.03. |
