| 2004 | AVI | Interactive interfaces of Treecube for browsing 3D multimedia data. | Yoichi Tanaka, Yoshihiro Okada, Koichi Niijima |
| 2004 | ICCVG | User-Controlled Multiresolution Modeling of Polygonal Models. | Muhammad Hussain, Yoshihiro Okada, Koichi Niijima |
| 2004 | MMM | LOD Modelling of Polygonal Models Based on Multiple Choice Optimization. | Muhammad Hussain, Yoshihiro Okada, Koichi Niijima |
| 2004 | WSCG | Efficient and Feature-Preserving Triangular Mesh Decimation. | Muhammad Hussain, Yoshihiro Okada, Koichi Niijima |
| 2003 | EJC | Treecube: 3D Visualization Tool for Hierarchical Information. | Yoichi Tanaka, Yoshihiro Okada, Koichi Niijima |
| 2003 | GMP | A Fast and Memory-Efficient Method for LOD Modeling of Polygonal Models. | Muhammad Hussain, Yoshihiro Okada, Koichi Niijima |
| 2003 | ICIP | Fast face detection by lifting dyadic wavelet filters. | Turghunjan Abdukirim, Koichi Niijima, Shigeru Takano |
| 2003 | IV | Treecube: Visualization Tool for Browsing 3D Multimedia Data. | Yoichi Tanaka, Yoshihiro Okada, Koichi Niijima |
| 2002 | MVA | Robust Tracking Algorithm Based on Color and Edge Distribution for Real-time Video Based Motion Capture Systems. | Yoshiaki Akazawa, Yoshihiro Okada, Koichi Niijima |
| 2001 | IV | Efficient Simplification of Polygonal Surface Models. | Muhammad Hussain, Yoshihiro Okada, Koichi Niijima |
| 2000 | ICIP | Subimage Extraction by Integer-Type Lifting Wavelet Transforms. | Shigeru Takano, Koichi Niijima |
| 2000 | VCIP | Impulse noise reduction from corrupted images using lifting wavelet filters. | Shigeru Takano, Koichi Kuzume, Koichi Niijima |
| 1999 | DIS | Rules Extraction by Constructive Learning of Neural Networks and Hidden-Unit Clustering. | Marghny H. Mohamed, Koichi Niijima |
| 1999 | DIS | Automatic Detection of Geomagnetic Sudden Commencement Using Lifting Wavelet Filters. | Shigeru Takano, Teruya Minamoto, Hiroki Arimura, Koichi Niijima, Toshihiko Iyemori, Tohru Araki |
| 1999 | ICIP | New Supervised Learning of Neural Networks for Satellite Image Classification. | Akito Ohkubo, Koichi Niijima |
| 1998 | DIS | Discovery of Differential Equations from Numerical Data. | Koichi Niijima, Hidemi Uchida, Eiju Hirowatari, Setsuo Arikawa |
| 1998 | DIS | Moving Object Recognition Using Wavelets and Learning of Eigenspaces. | Shigeru Takano, Teruya Minamoto, Koichi Niijima |
| 1998 | ICONIP | Learning of Three Layer Neural Networks Based on Domains of Attraction. | Marghny H. Mohamed, Akito Ohkubo, Teruya Minamoto, Koichi Niijima |
| 1998 | ICONIP | A Soil Moisture Map Generated from Satellite Data by Using Domains of Attraction in Neural Networks. | Akito Ohkubo, Marghny H. Mohamed, Koichi Niijima |
| 1992 | ALT | Domains of Attraction in Autoassociative Memory Networks for Character Pattern Recognition. | Koichi Niijima |