| 1998 | ICIP | The Surface-Shape Operator based Shading-Tolerant Method for Multiscale Image Analysis. | Phongsuphap Sukanya, Ryo Takamatsu, Makoto Sato |
| 1998 | ICPR | Image classification using the surface-shape operator and multiscale features. | Phongsuphap Sukanya, Ryo Takamatsu, Makoto Sato |
| 1996 | ICIP | A new operator for image structure analysis. | Phongsuphap Sukanya, Ryo Takamatsu, Makoto Sato |
| 1996 | ICPR | A hierarchical description of digital grayscale images based on image dipoles. | Supoj Chinveeraphan, Ryo Takamatsu, Makoto Sato |
| 1996 | ICPR | Stimulus-driven segmentation by Gaussian functions. | Shun Ido, Satoshi Arai, Ryo Takamatsu, Makoto Sato |
| 1996 | ICPR | A new operator for describing topographical image structure. | Phongsuphap Sukanya, Hideki Tanuma, Ryo Takamatsu, Makoto Sato |
| 1996 | MVA | Texture Classification Based on Topographic Image Structure. | Phongsuphap Sukanya, Ryo Takamatsu, Makoto Sato |
| 1995 | CAIP | Understanding of Ridge-Valley Lines on Image -Intensity Surfaces in Scale-Space. | Supoj Chinveeraphan, Ryo Takamatsu, Makoto Sato |