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RIKEN Center for Advanced Intelligence Project Geoinformatics Team

Team Leader: Naoto Yokoya (D.Eng.)

Research Summary

Naoto  Yokoya(D.Eng.)

We are studying geoinformatics to understand the current state of the Earth from multimodal spatio-temporal data such as satellite images, mobile data, and disaster data. In particular, we are working on intelligent data analysis based on image processing and machine learning to understand what is happening on the Earth in a timely manner from a large and diverse set of images obtained from visible, near-infrared, thermal infrared, and microwave based remote sensing. We are conducting research to support solutions to international social issues, such as disaster monitoring and environmental monitoring.

Research Subjects:

  • Earth observation data analysis
  • Data fusion
  • Machine learning

Main Research Fields

  • Informatics

Related Research Fields

  • Engineering
  • Complex Systems
  • Perceptual information processing
  • Intelligent informatics


  • Image processing
  • Remote sensing
  • Data fusion
  • Machine learning

Selected Publications

  • 1. Baier, G., He, W., and Yokoya, N.:
    "Robust nonlocal low-rank SAR time series despeckling considering speckle correlation by total variation regularization"
    IEEE Transactions on Geoscience and Remote Sensing, Early Access, pp. 1-13, (2020).
  • 2. Adriano, B., Yokoya, N., Miura, H., Matsuoka, M., and Koshimura, S.:
    "A semiautomatic pixel-object method for detecting landslides using multitemporal ALOS-2 intensity images"
    Remote Sensing, vol. 12, no. 3, pp. 561, (2020).
  • 3. Uezato, T., Yokoya, N., and He, W.:
    "Illumination invariant hyperspectral image unmixing based on a digital surface model"
    IEEE Transactions on Image Processing, vol. 29, no. 1, pp. 3652-3664, (2019).
  • 4. Chen, Y., He, W., Yokoya, N., and Huang, T.-Z.:
    "Non-local tensor ring decomposition for hyperspectral image denoising"
    IEEE Transactions on Geoscience and Remote Sensing, vol. 58, no. 2, pp. 1348-1362, (2019).
  • 5. He, W., Yokoya, N., Yuan, L., and Zhao, Q.:
    "Remote sensing image reconstruction using tensor ring completion and total-variation"
    IEEE Transactions on Geoscience and Remote Sensing, vol. 57, no. 11, pp. 8998-9009, (2019).
  • 6. Xu, Y., Du, B., Zhang, L., Cerra, D., Pato, M., Carmona, E., Prasad, S., Yokoya, N., Hansch, R., and Le Saux, B.:
    "Advanced multi-sensor optical remote sensing for urban land use and land cover classification: Outcome of the 2018 IEEE GRSS Data Fusion Contest"
    IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 12, no. 6, pp. 1709-1724, (2019).
  • 7. He, W., Yao, Q., Li, C., Yokoya, N., and Zhao, Q.:
    "Non-local meets global: An integrated paradigm for hyperspectral denoising"
    Conference on Computer Vision and Pattern Recognition (CVPR), pp. 6868-6877, (2019).
  • 8. Hong, D., Yokoya, N., Chanussot, J., and Zhu, X.X.:
    "An augmented linear mixing model to address spectral variability for hyperspectral unmixing"
    IEEE Transactions on Image Processing, vol. 28, no. 4, pp. 1923-1938, (2018).
  • 9. He, W., and Yokoya, N.:
    "Multi-temporal Sentinel-1 and -2 data fusion for optical image simulation"
    ISPRS International Journal of Geo-Information, vol. 7, no. 10, pp. 389, (2018).
  • 10. Yokoya, N., Ghamisi, P., Xia, J., Sukhanov, S., Heremans, R., Tankoyeu, I., Bechtel, B., Le Saux, B., Moser, G., and Tuia, D.:
    "Open data for global multimodal land use classification: Outcome of the 2017 IEEE GRSS Data Fusion Contest"
    IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 11, no. 5, pp. 1363-1377, (2018).


Related Links

Lab Members

Principal investigator

Naoto Yokoya
Team Leader

Core members

Junshi Xia
Senior Research Scientist
Clifford Broni-Bediako
Postdoctoral Researcher
Masashi Matsuoka
Visiting Scientist
Shunichi Koshimura
Visiting Scientist
Wei He
Visiting Scientist
Bruno Adriano Ortega
Visiting Scientist
Calimanut Ionut Cira
Visiting Scientist
Lihan Ouyang
Xiaoyu Dong
Junior Research Associate
Wanshui Gan
Junior Research Associate
Zhihao Liu
Junior Research Associate
Weihao Xuan
Junior Research Associate
Jian Song
Research Part-time Worker I
Or Raveh
Research Part-time Worker I
Tianyi Zhang
Research Part-time Worker I
Huanjian Zhou
Research Part-time Worker I
Zhiyuan Zhan
Research Part-time Worker I
Soichiro Nishimori
Research Part-time Worker I
Chao Ning
Research Part-time Worker I
Boyo Chen
Research Part-time Worker I
Yimin Wei
Research Part-time Worker I


Position Deadline
Seeking Research Scientists or Postdoctoral Researchers (W23324) Open until filled

Contact Information

Nihonbashi 1-chome Mitsui Building, 15th floor,
1-4-1 Nihonbashi,
Chuo-ku, Tokyo
103-0027, Japan
Email: naoto.yokoya [at] riken.jp