主な著書：K.Okajima (1990), A possible role of backward connections in the visual system. In E.Iwai & M.Mishkin eds., Vision, Memory and the Temporal Lobe. pp. 411-415, Elsevier Science Publishing, New York. (単行本の章)／K.Okajima (2001), An infomax learning algorithm for visual neural networks. In N.Mastorakis Ed., Advances in Neural Networks and Applications. pp. 158-163 (2001). World Scientific and Engineering Society Press, Athens.(単行本の章)
教育・研究テーマ
担当科目：基礎コンピュータ概論II／プログラム入門／プログラミングI/プログラミングⅡ／生体情報
学／AUT教育入門／キャリア形成と職業Ⅱ／キャリア形成と職業Ⅵ／情報セミナー／卒業研究
研究分野：機械学習／画像処理・認識／生体情報処理モデル
研究課題：顔画像検出に関する研究／画像診断支援システムに関する研究／脳の視覚情報処理モデルに
関する研究
主な学術論文
K.Okajima (2014) Spatiotemporal receptive fields of direction selective cells self-organized by an infomax-based learning mode. Neurocomputing (2014), pp. 548-555
K.Okajima (2010) Direction seletive cells generated through an Infomax based learning algorithm. Neuroscience Research, Volume 68, Supplement 1, 2010, Page e321
S. Obi, K.Okajima, Y.Kosizumi, and M.Murata (2006) Introduction of Learning Algorithm and Application of oil spill detection in SAR images, 電気学会論文誌A、IRRJ Trans. FM, Vol. 126 No. 6, pp.496-503
K.Okajima (2004) Binocular disparity encoding cells generated through an Infomax based learning algorithm. Neural Networks vol. 17, pp. 953-962.
H.Imaoka, K.Okajima (2004) An algorithm for the detection of faces on the basis of Gabor features and information maximization, Neural Computation, vol. 16, pp. 1163-1191.
K.Okajima, H.Imaoka (2002) Infomax and receptive field localization, Journal of Japanese Neural Network Society, vol. 9(4), pp. 224-233.
K.Okajima, H.Imaoka (2001) Receptive fields of visual cortical neurons as derived by infomax. Electronics and communications in Japan Part 3, vol. 84, pp.11-19.
K.Okajima (2001) An infomax-based learning rule that generates cells similar to visual cortical neurons. Neural Networks, vol.14, pp.1173-1180.
K.Okajima, H.Imaoka (2001) A complex cell-like receptive field obtained by information maximization. Neural Computation, vol.13, pp. 547-562.
K.Okajima (1992) Modeling of visual information processing in the brain. FED Journal, 1992 vol. 2, pp.32-36.
K.Okajima (1991) A recurrent system incorporating characteristics of the visual system: a model for the backward neural connections in the visual system. Biological Cybernetics, vol.65, pp.235-241.
K.Okajima (1986) A mathematical model of the primary visual cortex and hypercolumn. Biological Cybernetics, vol.54, pp.107-114.
K.Okajima, S.Tanaka (1984) Electronic conduction in the commensurate charge density wave state of 1T-TaS2. Journal of the Physical Society of Japan, vol. 53, pp.2332-2341.
T.Tani, K.Okajima, T.Itoh, S.Tanaka (1981) Electronic transport in 1T-TaS2. Physica 105B, pp.127-131.
S.Uchida, K.Okajima, S.Tanaka (1981) Temperature and electric field dependences of conductivity in 1T-TaS2. Solid State Communication, vol. 37, pp.799-802.
S.Uchida, K.Tanabe, K.Okajima, S.Tanaka (1980) Negative magnetoresistance and nonlinear conduction in Ti0.99V0.01Se2. Physica 99B, pp.199-203.
S.Uchida, K.Tanabe, K.Okajima, S.Tanaka (1979) Negative magnetoresistance and nonlinear conduction in Ti0.99V0.01Se2. Solid State Communication, vol. 31, pp.517-520.
その他
学会発表
S.Obi, K.Okajima, Y.Koizumi, and T.Yamashita (2005) Adopting Infomax learning algorithm for pattern extraction in SAR images, Proc. of SPIE Vol. 5980, pp59800H.
K.Okajima (2001) An infomax learning algorithm for visual neural networks. Proceedings of 2001 WSES International Conferences on Neural Networks and Applications (Puerto De La Cruz, Spain) pp. 4061-4066
K.Okajima (1998) Complex receptive field obtained by infomax coincides with the energy model for complex cells in the visual cortex. Proceedings of the International Conference on Neural Information Processing Systems (Kitakyushu, Japan) pp.657-660.
K.Okajima (1996) The Gabor-type receptive field as derived by the mutual-information maximization. Proceedings of the International Workshop on Brainware (Tokyo, Japan) pp.
M.Miyashita, K.Okajima (1995) Backward neural connection model of the visual cortex II: application to fugure-background discrimination problem and representation of three dimensional object shape. Proceedings of the 5th International Symposium on Bio
K.Okajima, M.Miyashita (1995) Backward neural connection model of the visual cortex I: mathematical framework of three dimensional object segmentation. Proceedings of the 5th International Symposium on Bioelectronic & Molecular Electronic Devices (Okinawa, Japap) pp.235-236.
K.Okajima (1995) The Gabor-type receptive field of a visual cortical neuron extracts the maximum information from input local images. Proceedings of the 5th International Symposium on Bioelectronic & Molecular Electronic Devices (Okinawa, Japap) pp.290-293.
K.Okajima (1993) A model for the horizontal neural connections in the primary visual cortex. Proceedings of International Joint Conference on Neural Networks (Nagoya, Japan) pp.45-48.
K.Okajima (1992) A model visual cortex incorporating the feedback and the intrinsic neural connections. Proceedings of 4th International Symposium on Bioelectronic & Molecular Electronic Devices (Miyazaki, Japan) pp.21-22.
K.Okajima(1991) Modeling of visual information processing. International Workshop on Future Electron Devices (Tokyo).
K.Okajima (1990) A recurrent system including a layer which performs localized spatial frequency analysis. Proceedings of International Neural Networks Conference (Paris) pp.504-507.
K.Okajima (1988) A possible role of backward connections in the visual system. Proceedings of International Symposium on Bioelectronic & Molecular Electronic Devices (Fujiyoshida, Japan), pp.101-104
K.Okajima, S.Tanaka, S.Fujiwara (1987) A heteroassociative memory network with feedback connection. Proceedings of 1st International Conference on Neural Networks (San Diego) pp. 711-718.
K.Okajima, S.Fujiwara (1985), Towards Bioelectronics -a possible model of the visual cortex. International. Symposium on Future Electron Devices (Tokyo)
S.Uchida, K.Okajima, S.Tanaka (1984), Temperature and electronic field dependences of conductivity in 1T-TaS2. Proceedings of 15th Intl. Conf. Physics of Semiconductors (Kyoto), p. 883.
T.Tani, K.Okajima, T.Itho, S.Tanaka (1980) Electronic transport properties in 1T-TaS2. Proceedings of the Yamada Conference IV, Physics & Chemistry of Layered Materials (Sendai, Japan) pp.127-131.
宮下真信，野村正英，岡島健治，藤原正三(1995) Modelling of.spatial and spatio-temporal receptive fields of cells in the visual system. 第14回新機能素子技術シンポジウム予稿集(東京)，pp.119-124.
