| 1. |
S Kawamura, M Hirai, N Takenaka, C Hiramatsu, FB Radlwimmer, S Yokoyama, O Takenaka, Y-chromosomal red-green visual pigment genes of nocturnal New World monkey, Aotus trivirgatus, ANTHROPOLOGICAL SCIENCE, Vol.111, No.1, p.129, 2003.01. |
| 2. |
C Hiramatsu, S Kawamura, Color-vision typing of New World monkeys by examining DNA from fecal samples, ANTHROPOLOGICAL SCIENCE, Vol.111, No.1, p.139, 2003.01. |
| 3. |
Chihiro Hiramatsu, Shoji Kawamura, Color vision polymorphism in wild new world monkeys in Costa Rica examined by gene typing for red-green visual pigments, ZOOLOGICAL SCIENCE, Vol.21, No.12, p.1347, 2004.12. |
| 4. |
S. Kawamura, T. Tsutsui, C. Hiramatsu, A. D. Melin, L. M. Fedigan, C. M. Schaffner, F. Aureli, H. Innan, Trichromacy is not necessarily advantageous in New World monkeys: toward understanding the frequent color-vision deficiencies in humans, ANTHROPOLOGICAL SCIENCE, Vol.114, No.3, p.240, 2006.12. |
| 5. |
A. Melin, L. Fedigan, C. Hiramatsu, S. Kawamura, Effects of color vision phenotype on insect capture by free-ranging white-faced capuchin monkeys (Cebus capucinus) in Santa Rosa National Park, Costa Rica, AMERICAN JOURNAL OF PRIMATOLOGY, Vol.68, p.133, 2006.08. |
| 6. |
Shoji Kawamura, Chihiro Hiramatsu, Toko Tsutsui, Hideki Innan, Amanda Melin, Linda Fedigan, Colleen Shaffner, Filippo Aureli, Biological significance of color vision polymorphisin in wild New World monkeys evaluated by population genetics and behavioral observation, GENES & GENETIC SYSTEMS, Vol.81, No.6, p.425, 2006.12. |
| 7. |
Yoshifumi Matsumoto, Norihiro Ozawa, Chihiro Hiramatsu, Yugo Okabe, Shoji Kawamura, Spectral differentiation and molecular evolution of L/M opsin alleles in family Atelidae, GENES & GENETIC SYSTEMS, Vol.82, No.6, p.541, 2007.12. |
| 8. |
Harada T, Goda N, Hiramatsu C, Toyoda H, Sadato N, Komatsu H, Topography of color-selective activity in the monkey inferior temporal cortex, Neuroscience Research (第32回日本神経科学大会抄録）, 10.1016/j.neures.2009.09.105, Vol.65, No.Supplement, p.S50, 2009.09. |
| 9. |
平松千尋, 郷田直一, 小松英彦, ヒト視覚野腹側経路に沿った素材質感の物理的表現から知覚的表現への変化, Neuroscience Research (第33回日本神経科学大会抄録）, 10.1016/j.neures.2010.07.1182, Vol.68, No.Supplement, p.e266, 2010.09. |
| 10. |
Goda N, Hiramatsu C, Komatsu H, Transformation from image-based to perceptual category representation of surface materials in human visual cortex, Society for Neuroscience 40th Annual Meeting (Neuroscience 2010), p.675.12, 2010.11. |
| 11. |
Behavioral test of dichromatism in genetically identified dichromatic macaques. |
| 12. |
Hiramatsu C, Goda N, Komatsu H, Representations of materials in the human visual cortex (Summary of Awarded Presentation at the 29th Annual Meeting), 基礎心理学研究, Vol.30, No.1, pp.135-136, 2011.09. |
| 13. |
Goda N, Hiramatsu C, Komatsu H, Neural representation of material categories in human visual cortex, Perception of Material Properties Workshop, 2011.06. |
| 14. |
Hiramatsu C, Goda N, Komatsu H, Image-based and perceptual representation of materials, Program and Summary of the ASSC15, p.129, 2011.06. |
| 15. |
Koida K, Yokoi I, Okazawa G, Goda N, Hiramatsu C, Mikami A, Kanthi AW, Miyachi S, Togawa M, Takagi M, Komatsu H, Color discrimination performance of genetically identified dichromatic macaques, ICVS 2011 Abstract Book (Baraas RC ed), p.109, 2011.07. |
| 16. |
Chihiro Hiramatsu, Amanda Melin, William Allen, Constance Dubuc, James Higham, Is primate trichromacy optimized for detecting variation in face coloration?, PERCEPTION, Vol.45, p.208, 2016.08. |
| 17. |
The use of glasses during registration into a low-cost eye tracking device under different lighting conditions
© 2017 IEEE. It is known that the use of glasses can hamper the quality and speed of user registration into eye-tracking devices. Studies have been done in which the performances of various eye-tracking devices were compared, typically under ideal viewing angles, with the user sitting behind a display under a fixed lighting condition. Here we investigated the influence of the use of glasses on the quality and time of user registration into a low-cost eye-tracking device under various lighting conditions. Furthermore, we compared the use of glasses on registration within the same group of participants. Participants with prescription glasses were asked to register into the eye-tracking device both with and without their glasses, if possible, and users without prescription glasses or with contact lenses were also asked to register without glasses or with replica, nonprescription glasses. The present results showed indeed that the use of glasses negatively influenced registration quality and time - significantly here, however, only when registration was performed under artificial lighting. Under natural lighting, the difference in registration quality and speed did not reach significance, but bordered on significance. A follow-up measurement confirmed these results, and suggested that calibration with glasses can improve when participants register under 'ideal' viewing angles for their particular viewing position.. |
| 18. |
Measurement of viewing distances and angles for eye tracking under different lighting conditions
© and Eye Tribe©). The results showed that the minimum and maximum viewing limit of the Tobii EyeX© did not vary significantly with different lighting conditions, and neither did the viewing angle range. The maximum viewing distance of the Eye Tribe© was significantly different between two conditions of artificial lighting, although the average difference was just 1 cm. The lowest viewing angle that allowed registration into the Eye Tribe© system also differed significantly between the two artificial lighting conditions, but here too the average angle difference was small (0.63°). Taken together, the results show that the performance of the two low- cost eye trackers tested here is robust enough under different conditions of illuminance and luminance for registration into the system. © 2017 IEEE. Eye tracking can be used for eye-gaze-based authentication in public settings, such as for registration on personal computers and automated teller machines. In this study, we conducted a series of measurements with low-cost eyetracking devices to assess the feasibility of their use in such settings. We investigated the devices' minimum and maximum viewing distance limits as well as viewing angle range. Both these parameters were tested under three different lighting conditions. The eye-tracking devices used in the measurements were among the most cost-effective devices commercially available today (Tobii EyeX. |
| 19. |
Amanda D. Melin, Chihiro Hiramatsu, Linda M. Fedigan, Colleen M. Schaffner, Filippo Aureli, Shoji Kawamura, Polymorphism and adaptation of primate colour vision, Evolutionary Biology: Mechanisms and Trends, 10.1007/978-3-642-30425-5_13, pp.225-241, 2013.06, Opsins provide an excellent model system for studying evolutionary interconnections at genetic, phenotypic and behavioural levels. Primates have evolved a unique ability for trichromatic colour vision from a dichromatic mammalian ancestor. This was accomplished via allelic differentiation (e.g. most New World monkeys) or gene duplication (e.g. Old World primates) of the middle to long-wavelength sensitive (M/LWS) opsin gene. However, questions remain regarding the behavioural adaptations of primate trichromacy. Allelic differentiation of the M/LWS opsins results in extensive colour vision variability in New World monkeys, where trichromats and dichromats are found in the same breeding population, enabling us to directly compare visual performances among different colour vision phenotypes. Thus, New World monkeys can serve as an excellent model to understand and evaluate the adaptive significance of primate trichromacy in a behavioural context. In this chapter, we summarise recent findings on colour vision evolution in vertebrates, with special emphasis on primates, and introduce our genetic and behavioural study on primate colour vision polymorphism and adaptation.. |
| 20. |
S. Kawamura, C. Hiramatsu, A. D. Melin, C. Schaffner, F. Aureli and L. M. Fedigan, Post-Genome Biology of Primates, Chapter 7 Polymorphic Color Vision in Primates: Evolutionary Considerations, Springer, 2011.12. |
| 21. |
Adaptive Significance of Primate Color Vision. |
