Publications (Part of publications)

Visual Pattern Recognition

2004: Ishizuka, Y. and Hirai, Y. "Segmentation of road sign symbols using opponent-color filters." Presented at ITSWC2004 Nagoya.(Paper pdf: 597KB) (Slide file pdf: 802KB)
1997: Sasaki, M. and Hirai, Y. "Unconstrained handwritten numerals recognition using line features extracted by DOG filters." ICONIP'97, pp.1215-1218
1992: Kim, W., Furukawa, T., Tokunaga, R. and Hirai, Y. "Extraction and reconstruction of road segments by spatial filters." Proceedings of IAPR Workshop on Machine Vision Applications, pp.515-518
1992: Kawashima, M., Tokunaga, R. and Hirai, Y. "Contour map reconstruction via multi-module parallel processing system." Proceedings of IAPR Workshop on Machine Vision Applications, pp.87-91
1992: Furukawa, T., Kim, W. and Hirai, Y. "Restoration of road information occluded by map symbols using spatial filters." Proceedings of the IJCNN'92, pp.Vol.I/603-608
1991: Kim, W., Hirai, Y., Furukawa, T. and Arita, H. "A neural network extracting road segments from maps using necessary and sufficient features." Proceedings of the IJCNN'91, pp.Vol.I/665-670
1990: Hirai, Y. and Tsukui, Y. "Position independent patten matching by neural network." IEEE SMC, Vol.SMC-20, No.4, pp.816-825

Visual Information Processing

2002: Ogiya, M., Sakai, K. and Hirai, Y. "Integration of space and time leading the simultaneous perception of depth and motion - Perception of objects moving behind a thin slit -." Proceedings of the ICONIP'02, pp.1231-1235
2000: Tsujimura, S., Shioiri, S. Hirai, Y. and Yaguchi, H. "Technique to investigate the temporal shift between L- and M-cone inputs to the luminance mechanism." JOSA A, Vol.17, No.5, pp.846-857
1999: Tsujimura, S., Shioiri, S. Hirai, Y. and Yaguchi, H. "Selective cone suppression by the L-M- and M-L-cone-opponent mechanisms in luminance pathway." JOSA A, Vol.16, No.6, pp.1217-1228
1997: Tsukahara, T. and Hirai, Y. "Stereo matching by forbidden cone (in Japanese)." Journal of IEICE Japan, Vol.J80-D-II, No.2, pp.660-668
1996: Takahashi, T. and Hirai, Y. "Self-organization of spatio-temporal visual receptive fields." IEICE Trans. on Inf. and Sys., Vol.E79-D, No.7, pp.980-989
1996: Tsukahara, T. and Hirai, Y. "A stereo matching network and its biological implications." ICONIP'96, pp.335-361
1994: Hirai, Y. and Tsukahara, T. "A stereo matching network finding curved surfaces from random-dot stereograms." Proceedings of the Third Workshop on Neural Networks: From Biology to High energy Physics, pp.183-188 (pdf: 248KB)
1994: Takahashi, T. and Hirai, Y. "Self-organization of spatio-temporal receptive fields." Proceedings of ICONIP'94, pp.960-965

Signal Processing

• 2004: Yamashita, J., Tatsuta, S. and Hirai, Y. "Estimation of propagation delays using orientation histograms for anechoic blind source separation." to be presented at IJCNN2004 (sound)
2004: Yamashita, J. and Hirai, Y. "Blind source separation using orientation histograms in joint mixture distributions." 2nd IASTED International Conference on Neural Networks and Computational Intelligence, pp.152-157
2002: Shindo, H. and Hirai, Y. "Blind source separation by a geometrical method", Prpceedings of IJCNN 2002, pp.1109-1114 (pdf:1,666KB)
1998: Pun, M. O. and Hirai, Y. "A simple variable step algorithm for blind source separation (BSS)." Proceedings of the 1998 IEEE Signal Processing Society workshop, pp.73-82

Associative Media Information Processing

2004: Nakano, K. and Hirai, Y. "Japanese named entity extraction with bunsetsu features (in Japanese) ." Journal of IPSJ, Vol.45, No.3, pp.934-941
1999: Kawamura, M., okada, M. and Hirai, Y. "Dynamics of selsective recall in an associative memory with one-to-many associations." IEEE Trans. on Neural Networks, Vol.10, No.3, pp.704-713
1989: Ma, Q. and Hirai, Y. "Modeling the acquisition of counting with an associative network." Biological Cybernetics, Vol.61, No.4, pp.271-278
1988: Hirai, Y. and Ma, Q. "Modeling the process of problem-solving by associative networks capable of improving the performance." Biological Cybernetics, Vol.59, No.6, pp.353-365
1987: Hirai, Y. and Kamijyo, K. "On the psychological validity of a model of human associative processor, HASP (in Japanese)." Journal of IEICE Japan, Vol.J70-D, No.1, pp.175-184
1985: Hirai, Y. "Mutually linked HASPs: A solution for constraint satisfaction problems by associative processing." IEEE Trans. on SMC, Vol.SMC-15, No.3, pp.432-442
1983: Hirai, Y. "A model of human associative processor (HASP)." IEEE Tras. on SMC, Vol.SMC-13, No.5, pp.851-857

Hardware Implementation of Neural Networks

2001: Hirai, Y., Ochiai, T. and Yasunaga, M. "A neural network system composed og 1000 neurons and one million 7-bit synapses (in Japanese)." Journal of IEICE Japan, Vol.J84-D-II, No.6, pp.1185-1193 (pdf: 3,363KB)
2001: Hirai, Y. and Nishizawa, K. "Hardware implementation of real-time PCA learning networks (in Japanese)." Journal of IEICE Japan, Vol.J84-D-II, No.4, pp.688-707 (pdf: 897KB)
2000: Hirai, Y. and Nishizawa, K. "Hardware implementation of a PCA learning network by an asynchronous PDM digital circuit." IJCNN2000, in CD-ROM, 6 pages (pdf: 150KB)
1997: Hirai, Y. "A 1,000-neuron system with one million 7-bit physical interconnections." NIPS 10, pp.705-711 (pdf: 561KB)
1989: Yasunaga, M., Masuda, N., Asai,M., Yamada, M., Masaki, A. and Hirai, Y. "A wafer scale integration neural network utilizing completely digital circuits." Proceedings of the IJCNN'89, pp.Vol.II/213-217
1989: Hirai, Y., Kamada, K., Yamada, M. and Ooyama, M. "A digital neuro-chip with unlimited connectability for large scale neural networks." Proceedings of the IJCNN'89, pp.Vol.II/163-169